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The housing unit method of population estimation is often characterized as being imprecise and having an upward bias. In an earlier paper we argued that the method itself cannot be properly characterized by a particular level of precision or direction of bias. Only specific techniques of applying the method can have such characteristics. In that paper we presented several new techniques for estimating the number of households and average number of persons per household (PPH). However, the testing of these new techniques was limited by the lack of census results against which the estimates could be compared. Complete census data on population, households, and PPH are now available and can be used to test alternate estimation techniques. In this paper we replicate the tests reported in our earlier paper using 1980 census data for Florida's 67 counties. These tests provide further evidence that the new techniques produce more precise, less biased estimates than previously used techniques. [ABSTRACT FROM AUTHOR]

Childbearing motivation may be conceptualized as based upon psychological traits and shaped by experiences during childhood, adolescence, and early adult life. This paper explores what those traits and developmental experiences are. Two measures of childbearing motivation, one positive and the other negative, are described. Using a sample of 362 married men and 354 married women, the paper systematically examines the factors associated with these measures. In addition to a set of basic personality traits, these factors include parental characteristics, teenage experiences, and a number of variables from young adult behavior domains such as marriage, education, work, religion, and parental relationships. Stepwise multiple regression analyses lead to two final constrained, simultaneous-equation regression models. These models indicate the importance of both personality traits and diverse life-cycle experiences in the development of childbearing motivation, the differential gender distribution of predictors, and the different experiential antecedents of positive and negative motivation. [ABSTRACT FROM AUTHOR]

This paper examines the relation between unmarried cohabitation and three important determinants of fertility-frequency of sexual intercourse, contraceptive practice, and the expectation to have a child within five years. Analyses based on data from the 1982 National Survey of Family Growth show that formerly married cohabitants are similar to married women with respect to these fertility determinants, but that never married cohabitants may have lower fertility in the short run because of extremely high levels of contraceptive practice. The paper also compares self-reported data on cohabitation with an inferred measure based on household composition. [ABSTRACT FROM AUTHOR]

This paper has developed estimates of the age-specific mortality rates prevailing during the Great Irish Famine and has analyzed fertility trends during the 25 years before the Famine. Our calculations confirm that 1 million Irish people perished as a result of this disaster. This figure does not include the deaths among the 1.3 million emigrants who left Ireland during the Famine period. The Famine produced a significant drop in the fertility rate, and we estimate that more than 300,000 births did not take place as a result of the Famine. The effects were especially severe on the very young and the very old, a result echoed in the findings of demographic analyses of other famines. Our procedure permits a reconstruction of the Irish population by age and sex during the period 1821-1841. In addition, it yields year-by-year estimates of the birth rate over this period. We estimate that the rate fell by about 14 percent, a result robust to our assumptions regarding emigration. Economic historians have debated this issue, and we hope that our evidence, although preliminary, will be of assistance. Our analysis also permits year-by-year reconstruction of Irish population totals for the period 1821-1851. Two years are of particular interest. Virtually all recent writers, with the notable exception of Lee (1981), have suggested that the 1831 census returns overestimated the actual population resident in Ireland at that date. Our reconstruction supports the validity of the 1831 census figure. We obtain a total of 7,847,000, which is in good agreement with the disputed census figure of 7,767,000. But perhaps the most interesting figure is the population total for the end of 1845, the highest ever achieved in Ireland. We estimate that the population on the eve of the Great Famine was 8,525,000. Throughout the paper we have tried to highlight those areas in which the data are unreliable, unavailable, or distorted. We have tried to devise cross-checks for consistency and to test the sensitivity of the results to a range of assumptions. A case in point concerns the age-sex profile and volume of emigration to England, Scotland, and Wales. Additional work at the micro level would be helpful here. More solid evidence on Famine births would also be helpful. The parish registers we have sampled certainly provide a clue to trends, but we have only made a start in that respect. A much more comprehensive survey is needed to convey the national picture.(ABSTRACT TRUNCATED AT 400 WORDS) [ABSTRACT FROM AUTHOR]

By restricting the number of age groups to two and by introducing continued fractions, the dynamics of populations with deterministically changing vital rates are completely specified at all times. Explicit expressions for the sequence of the product of population projection matrices are given. From these, relative age distribution and reproductive values to any desired accuracy are obtained as functions of the vital rates. Thus, the results given in this paper are stronger than any existing weak ergodic theorems. [ABSTRACT FROM AUTHOR]

This paper addresses the question of whether the crude birth rate (CBR) can be used as a proxy for more refined fertility measures in cross-national models of fertility determinants. It responds to a recent claim that the CBR represents an inappropriate fertility measure for these purposes. In the analysis, several strategies are used to assess the degree to which results based on the CBR are sensitive to lack of adjustment for age structure. The paper concludes that using the CBR as a proxy has minor and unimportant effects upon conclusions regarding fertility determinants. [ABSTRACT FROM AUTHOR]

This paper discusses recent migration to North America with reference to the 1962 and 1967 Canadian immigration regulations and the 1965 United States Immigration and Nationality Act. Despite the similar emphasis on manpower and kinship criteria as the basis for the admission of immigrants, differences between Canada and the United States exist with respect to the importance of immigration for the respective economies, the organization of immigration, the formal regulations, and the size and composition of migrant streams. After an examination of the volume, origin, and occupational composition of immigration to Canada and the United States, flows between the two countries are studied. The paper concludes with a scrutiny of changes in immigration regulations which are pending in both countries. [ABSTRACT FROM AUTHOR]

Researchers have long wondered whether marital-status differences in mortality arise largely from selection mechanisms or from causal processes typically known as marriage protection. Unfortunately, many investigators have relied on aggregate patterns of mortality differentials--such as age schedules of excess mortality in the single population or the relationship between the level of excess mortality and the relative size of the single population--to make inferences about the relative importance of selection and causal processes. In this paper, a simple mathematical simulation model is used to demonstrate that many inferences derived from observed patterns are simply not justified. This finding highlights the importance of prospective data for assessing the relative importance of selection and causal factors in accounting for the excess mortality of the unmarried. [ABSTRACT FROM AUTHOR]

This paper uses the family mode of organization framework to link together hypotheses relating social change to fertility limitation. Experiences in nonfamily activities are predicted to affect fertility behavior, with the outcome depending on the social, economic, and cultural context. To provide individual-level tests of hypotheses, the paper uses data from a Nepalese community which recently began dramatic family and fertility transitions. The findings show that experiences in nonfamily activities before marriage increase the odds of subsequently adopting fertility limitation in this setting. The evidence also demonstrates the importance of including measures of husbands' experiences in models of fertility decisions. [ABSTRACT FROM AUTHOR]

This paper adds to our limited knowledge of racial and ethnic variation in union formation by describing and analyzing the first unions of mainland Puerto Rican women. Retrospective history data show that Puerto Ricans have shared in the post-1970 shift toward cohabitation. Puerto Rican women, however, are much more likely to enter informal first unions than the general population, and have a low propensity to transform informal unions into legal marriages. The paper examines the influence of family background and current activities on union timing and type. The relationship between partner attributes and the choice between formal and informal coupling is also considered. [ABSTRACT FROM AUTHOR]

It is widely believed that structural variables such as inequitable land distribution, lack of rural employment opportunities, and rural-urban wage and amenity gaps influence population movements in developing countries. Yet quantitative evidence is scant. In this paper a multilevel model is used to investigate the effects of individual-, household-, and areal-level factors on rural-urban out-migration in the Ecuadorian Sierra. Data from a detailed survey carried out in 1977-1978 and from government macro-areal statistics are used to investigate factors affecting the out-migration of youths aged 12-25. Preliminary conclusions are presented on the usefulness of multilevel models in studying migration and policy implications for Ecuador. [ABSTRACT FROM AUTHOR]

The formula for the age distribution and other relationships that follow from it for any (non-stable) population presented by Preston and Coale are significant contributions to demography. The formulas summarize the relationships among various demographic measures precisely, and are formally analogous to the relationships that hold for stable populations. The significance of these formulas cannot be overstated; they allow us to understand clearly the relationships among demographic measures in any arbitrary population. However, when it comes to using them for estimating demographic measures when census data are defective, the method of estimation is still affected by defective data. The reason is that the series of age-specific growth rates reflects the observed census age distributions exactly so that any defects in the census data are summarized in the growth rates. This paper begins with the formulation of the discrete version of the "new synthesis" developed by Preston and Coale. With the discrete formulation, the three kinds of errors introduced when the continuous time formulas are applied to real data can be avoided. Then it is pointed out that when two accurate census data are available, the Preston-Coale procedure of "estimating" the age distribution at the second census is equivalent to checking the identity of the age distribution formula. Also "estimating" mortality by the procedure of Preston-Coale is shown to be equivalent to obtaining mortality directly from intercensal survival rates. That the procedure which involves the age-specific growth rates is equivalent to those that involve the intercensal survival rates may have escaped notice because there are no a priori constraints for patterns of age-specific growth rates to follow. The irregularity in growth rates due to defective data are not distinguishable from true irregularity that exists in the population, contrary to the well-known regularity in the pattern of survival rates in human populations. [ABSTRACT FROM AUTHOR]

This paper has analyzed a theoretical model of mobility decision-making. The model relies entirely on individual-level factors rather than macro-level factors as determinants of migration decision-making. The individual-level variables included in the model are: recent mobility history, urban social contacts, information about urban areas, evaluations of different locations, migration plans, and actual movements in the period subsequent to an initial interview. The empirical results indicate that with some exceptions there are relatively strong links of the type suggested in the model among these variables. The model was evaluated separately for two groups of villages for movement to Bangkok and for movement to Northeast Thai towns. Thus, four submodels were estimated, providing an opportunity to observe how robust the model is with respect to varying destinations and origins. Although certain differences are found among the four submodels, the overwhelming feature is their similarity. Where differences do exist, they generally reflect differences in the effectiveness of prior mobility as a predictor of other variables in the process. Clearly, a villager's previous history of movement is a key factor affecting subsequent movement and the entire decision-making process. The primary effect of having friends and relatives in a particular urban center is to increase the amount of information a villager has about that urban center. Information has a significant effect on evaluations and plans. Except in one submodel, evaluations have a significant effect on plans; and the existence of plans-which to some extent represent a culmination of social contacts, information, and evaluations-is the only factor other than previous mobility which has a significant direct effect on subsequent movement. Thai policy makers are searching for ways to stimulate the growth of regional urban growth centers and reduce the growth of Bangkok. From the standpoint of intervention, a key variable in this process would appear to be information. Not only is information level related to evaluations of an urban area and mobility plans, but, compared to other variables in the model, it appears to be relatively amenable to modification by inputs deriving from a source external to the village itself. It appears difficult to modify evaluations or migration plans directly, though both could be indirectly influenced by informational inputs. Movement history would be difficult, if not impossible, to manipulate; while villagers could be sponsored for short trips to town, this is not likely to produce much long-range effect. The possibility of expanding the network of urban social contacts-to build "social bridges" connecting the villages to Northeast towns-has a certain theoretical appeal, but in practical terms it would appear to be more feasible to introduce appropriate information into the village to alter subsequent mobility patterns. [ABSTRACT FROM AUTHOR]

In this paper, we have traced changes in the patterns of first marriage in the United States for cohorts of men and women born in 1880 through 1965 and for the years from 1900 through 1983. There were striking changes in marriage rates associated with each of the world wars and with the depression of the 1930s. In addition to these short-term fluctuations, a long-term shift in marriage rates is observed over the period from after World War II until about 1970. By the end of the 1970s, however, marriage rates had returned to levels similar to those observed before the war. The basic similarity in the timing of changes in marriage rates across age levels and for both men and women, blacks and whites, is a striking characteristic of these marriage curves. There are also, however, important differences among these groups with respect to the magnitude and slopes of the shifts. The postwar marriage boom was strongest among the young (those under age 24) and among whites. Similarly, the declines in marriage rates observed in the 1970s were greatest among the young. The marriage rates for teenagers display trends that diverge in many respects from those of older persons. For example, the marriage rates of male teenagers did not show the "peaks" and "valley" associated with World War II for older age groups and female teenagers. Moreover, there is little sign of the postwar marriage boom among black teenagers of either sex. Indeed, the marriage rates of black teenagers began to decline soon after the war, and by the 1970s the marriage rates of both male and female black teenagers had fallen below those of their white counterparts, reversing the pattern that had existed through the first half of this century. During the twenty-five or so years of the postwar marriage boom, which we believe can be characterized best as a period phenomenon, there were trends-eddies within the mainstream-which are probably most easily interpreted as the consequence of a cohort effect.(ABSTRACT TRUNCATED AT 400 WORDS) [ABSTRACT FROM AUTHOR]

Our analysis of changing birth interval distributions over the course of a fertility transition from natural to controlled fertility has examined three closely related propositions. First, within both natural fertility populations (identified at the aggregate level) and cohorts following the onset of fertility limitation, we hypothesized that substantial groups of women with long birth intervals across the individually specified childbearing careers could be identified. That is, even during periods when fertility behavior at the aggregate level is consistent with a natural fertility regime, birth intervals at all parities are inversely related to completed family size. Our tabular analysis enables us to conclude that birth spacing patterns are parity dependent; there is stability in CEB-parity specific mean and birth interval variance over the entire transition. Our evidence does not suggest that the early group of women limiting and spacing births was marked by infecundity. Secondly, the transition appears to be associated with an increasingly larger proportion of women shifting to the same spacing schedules associated with smaller families in earlier cohorts. Thirdly, variations in birth spacing by age of marriage indicate that changes in birth intervals over time are at least indirectly associated with age of marriage, indicating an additional compositional effect. The evidence we have presented on spacing behavior does not negate the argument that parity-dependent stopping behavior was a powerful factor in the fertility transition. Our data also provide evidence of attempts to truncate child- bearing. Specifically, the smaller the completed family size, the longer the ultimate birth interval; and ultimate birth intervals increase across cohorts controlling CEB and parity. But spacing appears to represent an additional strategy of fertility limitation. Thus, it may be necessary to distinguish spacing and stopping behavior if one wishes to clarify behavioral patterns within a population (Edlefsen, 1981; Friedlander et al., 1980; Rodriguez and Hobcraft, 1980). Because fertility transition theories imply increased attempts to limit family sizes, it is important to examine differential behavior within subgroups achieving different family sizes. It is this level of analysis which we have attempted to achieve in utilizing parity-specific birth intervals controlled by children ever born. First, our analysis of all birth intervals for a series of cohorts, across the fertility transition, controlling for CEB, suggests that even during the periods of natural fertility, there were, at least among our population, a group of women who both spaced and limited the number of children ever born. Over the course of the transition, because increasing numbers of women modify their behavior to terminate childbearing at lower levels of children ever born, they appear to adopt a pattern of birth spacing already evident among a small group of women in earlier, seemingly natural fertility birth cohorts. Our discussion has also identified several difficulties or compositional effects which may arise in computing simple averages of birth intervals as indicators of the relevant extent of spacing and stopping behaviors. This study was designed also to determine whether the transition within our study population was principally the result of women adopting birth spacing schedules already extant within sub- groups of the population or the product of fertility limitation late in the childbearing career. Our data indicate that birth intervals for the population as a whole increase following the early period of natural fertility. These conclusions are consistent with earlier maórosimulation studies (Anderton et al., 1982; Willigan et al., 1982) in which it was found that a hypothetical simulation model fits observed data only when the model specified a set of increasing birth intervals spread across a considerable range of parities for women of any given completed family size. Accompanying, and abetting, this change in fertility behavior was a shift to older ages of marriage characterized by longer birth intervals. There are, of course, practical issues to be addressed if one is to accept the argument that spacing was involved in limiting fertility, and that the fertility transition involved a compositional shift from subcohorts with short intervals to subcohorts with long birth intervals. First, there is substantial evidence from historical demographic research that the fertility transition is marked primarily by parity dependent control, reduced age at last birth and lengthened penultimate and ultimate birth intervals. Such conclusions are also supported by evidence from a number of family planning pro- grams in developing societies with high fertility. Specifically, adoption of contraception is most frequent among high parity, older women. We do not dispute these findings. We do, however, suggest they may be incomplete. Large samples of historical populations which make it possible to disaggregate populations over the course of the entire transition by CEB and parity provide additional information. A second practical issue is whether the means to space systematically and there-by to limit family size were available prior to the introduction of modern contraceptive technology. Prior to the time studied in this paper, and in the absence of modern contraceptive technology, women in France reduced family size substantially. Fertility had also declined significantly among the populations of the Eastern sections of the United States from which the original members of the LDS Church, heavily represented in our sample, had been recruited. It seems, therefore, that modern contraceptive technology is not a necessary condition for family limitation. The results of this analysis have implications for both historical demographic research and contemporary family planning policies. We have clearly supported previous authors' suggestions that birth interval analyses provide valuable in- sights to behavioral change and supplement other fertility indices in historical demographic research. The combined evidence of increasingly long birth intervals over cohorts and the presence of individuals demonstrating such behavior during the "natural" fertility period suggest adaptive fertility behavior rather than innovative behavior underlying the fertility transition within this population. In turn, our analysis suggests that further study of birth intervals and the spread of fertility limitation may be relevant to contemporary settings. [ABSTRACT FROM AUTHOR]

This paper assesses the ways in which the availability of family planning program outlets influences the likelihood of contraceptive use in rural Thailand. It focuses on a village-level measure of actual availability of sources rather than respondent perceptions of availability. Individual-level and village-level data collected as part of the second Thailand Contraceptive Prevalence Survey are used to test three hypotheses about the effects of actual availability: that (a) availability of family planning outlets increases the likelihood of contraceptive use; (b) it enhances the effect of a desire for no more children on the likelihood of use; and (c) it weakens the positive relationship between education and the likelihood of use. [ABSTRACT FROM AUTHOR]

This paper estimates ever-married birth rates by age and duration since first marriage and ever-married total fertility rates for the Republic of Korea, derived by applying an extension of the own-children method of fertility estimation to the 1975 and 1980 censuses. Since each census provides annual estimates for the 15-year period previous to enumeration, there is a ten-year period of overlapping estimates that facilitates checks for consistency and accuracy. Comparisons are also made with estimates derived from the 1974 Korea National Fertility Survey, which was part of the World Fertility Survey. The method works well, except in its application to the 1975 Census where the evidence suggests considerable misreporting of age at first marriage because of the way the question was asked and coded. Results confirm that ever-married fertility fell substantially in Korea between 1961 and 1980, with a temporary resurgence in the late 1960s and early 1970s. Ever-married fertility rose at younger ages and shorter durations and fell at older ages and longer durations. Ever-married fertility differentials by urban-rural residence and by education were usually in the expected direction, with urban fertility generally lower than rural fertility and the fertility of those with more education usually lower than the fertility of those with less education. Differential ever-married fertility by urban-rural residence and education declined over the estimation period. [ABSTRACT FROM AUTHOR]

Many theories of geographic mobility assume that the change-of-residence process includes a substantial degree of choice. This paper classifies stated reasons for moving from the 1973 through 1977 Annual Housing Survey into forced, imposed, and preference-dominated categories. About 25 percent of residential mobility and 40 percent of migration occurred under conditions of substantial constraint. Mobility was most often constrained by family dynamics; for migration, occupational relocations frequently imposed the decision-to-move process and determined destinations. The volume of constrained movement indicates that its impact upon individuals, population dynamics, and voluntaristic theories of mobility deserves greater consideration. [ABSTRACT FROM AUTHOR]

In this paper we develop and test a theory of childhood mortality after the first month of life. Parents are assumed to have well-defined family size and sex composition objectives and to face severe budget constraints. In this set of circumstances, it is understandable that they will make allocative decisions that will affect the survival probabilities of children. These decisions and the environmental influences on mortality are the basic forces which determine whether a child will survive through the post-neonatal period. The model is tested with survey data from rural Uttar Pradesh, India. The results are consistent with the hypothetical framework discussed above. The burden of this pattern of choice is felt particularly strongly by female births. [ABSTRACT FROM AUTHOR]

This paper analyzes cross-cohort trends in the age pattern of women at first birth in the United States. The analysis involves fitting the Coale-McNeil marriage model to the age distribution of first birth frequencies for a number of recent white and nonwhite cohorts. Methodologically, the results (a) provide support for the application of the Coale-McNeil marriage model to first birth data, and (b) demonstrate the ability of the model to accurately project first birth fertility for cohorts which have yet to complete their childbearing years. Substantively the results indicate (a) that the proportion of women who will never have a first birth is increasing across cohorts and can be expected to be as high as .25 and .20 for recent white and nonwhite cohorts respectively; (b) that recent nonwhite cohorts have an appreciable number of first births at earlier ages than their white counterparts, as well as a lower mean age at first birth and increasingly less dispersion (across cohorts) in their age at first birth; and (c) that the mean age at first birth and the proportion of first births occurring between ages 25 and 34 is increasing across cohorts of white women but is stable across cohorts of nonwhite women. [ABSTRACT FROM AUTHOR]

This paper is part of a long-term investigation known as the Mormon Historical Demography Project. It examines the capability of a simulation model, originally proposed by John Bongaarts (1976), to fit the natural fertility pattern which characterized the mid-nineteenth century Mormon population. Application of this model permits estimates to be made of the historical timing and age-incidence of fertility limitation. A sensitivity analysis of the model's parameters demonstrates that simple changes in the model's proximate determinants of fertility, excluding contraceptive practices, would be insufficient to account for later transition effects. Thus the results successfully capture the dynamics underlying the Mormon natural fertility pattern as well as offer a framework for future modeling of the transition away from natural fertility. [ABSTRACT FROM AUTHOR]

Recent work with samples of black and white urban American women showed a clear behavioral sequence relating age at menarche to age at first intercourse to age at first birth. This paper shows that the linking of ages at menarche, intercourse, marriage, and first birth is a pattern which occurs in very diverse cultures. We present confirmatory data from the United States, Belgium, and Pakistan, and from Malay and Chinese women in Malaysia. We interpret our findings as indicating a biological process leading to (a) social interpretations of readiness for reproduction, and (b) persisting biological differences between early and late maturing women. [ABSTRACT FROM AUTHOR]

The purpose of this paper is to shed light on the causes of the rapid decline in the infant mortality rate in the United States in the period after 1963. The roles of four public policies are considered: Medicaid, subsidized family planning services for low-income women, maternal and infant care projects, and the legalization of abortion. The most striking finding is that the increase in the legal abortion rate is the single most important factor in reductions in both white and nonwhite neonatal mortality rates. Not only does the growth in abortion dominate the other public policies, but it also dominates schooling and poverty. [ABSTRACT FROM AUTHOR]

This paper examines determinants of timing of marriage for young women by modeling the transition from the single to the married state by age. This approach, combined with a large longitudinal data set, allows us to disaggregate the analysis into fine age groupings and to include situational and attitudinal factors in our model. We find that those characteristics of a young woman's parental family that reflect the availability of parental resources tend to decrease the chances of a marriage during the early teens. Chances of marrying appear to decrease with increases in the availability and attractiveness of alternatives to the wife role and in the costs of assuming it. We discuss these results from the perspective of the societal and parental normative pressures which affect timing of marriage for young women. [ABSTRACT FROM AUTHOR]

Breast-feeding is the focus of rapidly growing interest. Research on the determinants of breast-feeding is only beginning. The research in this paper is based on World Fertility Survey data for Sri Lanka. We develop what we believe to be an appropriate probit model and find that there are significant socioeconomic factors that influence breast-feeding, in addition to the demographic factors focused upon in the literature. Moreover, some of them have clear policy implications, which are elaborated herein with respect to labor force, education, family planning and internal migration policies. In the course of the paper we also address a number of generally neglected statistical issues that should be considered in analyzing the determinants of breast-feeding, including problems resulting from digit preference or age heaping, the need to use dichotomous dependent variables, unavoidable truncation biases in the basic data, and structural shifts in the determinants of breast-feeding at different durations. [ABSTRACT FROM AUTHOR]

While births may be dichotomous, fertility intentions are not inherently so. Intentions are predictions about the future and, as such, are couched in considerable uncertainty. Ignoring this uncertainty hides much of what could be learned from data on fertility intentions. This paper presents a model which allows analysis of the full range of intentions. This paper presents a model which allows analysis of the full range of intentions. After selecting a sample of women in the later stage of childbearing (e.g., those who intend fewer than two additional children) from the 1965 and 1970 National Fertility Studies, it is shown that: (1) substantial portions of women at this stage of the reproductive life cycle were indeed uncertain of their parity-specific intention; (2) this certainty, like more firm intentions, varies by age and parity as the model predicts; and (3) there were significant shifts in the level of certainty between 1965 and 1970. Specifically, while intentions for third, fourth, and fifth births declined, more women "didn't know" if they intended to have another child or not. Among those not intending another child, more seemed uncertain of this intention in 1970 than did comparable women in 1965. In contrast, those intending another child seemed more certain. These changes in intention and uncertainty indicate that the observed decline in intended parity was tentative. Post-1970 evidence suggests that this tentative decline has become an equivocal one. [ABSTRACT FROM AUTHOR]

This paper examines inter-provincial female migration in Chile for the 1965--1970 period, with a view to describing socioeconomic characteristics of migrant women and to determining differences and similarities in age, educational level, occupation, and type of move (first, return, or repeat) between movers to the capital and to other urban areas. Data are from a five percent sample of the 1970 Chilean census. Findings reveal that non-return migrants to other urban areas are differentiated from those to Santiago by an older age structure, higher educational levels, higher status occupations, and are more likely to be making a second (or higher-order) move. Moreover, educational measures suggest that recent female migration to urban Chile is more prevalent among the upper than the lower strata of the society. [ABSTRACT FROM AUTHOR]

This paper introduces an analytic framework that can be used to assess the relationships between individual movement differentials and place characteristics, on the one hand, and aggregate mobility levels and city-suburb population change (in size or composition), on the other. Application of this framework using census data for individual metropolitan areas allows the analyst to decompose population changes due to net migration into contributing mobility streams and their component rates which are subject to unique community and individual influences. The paper provides both theoretical and empirical rationale for the framework, illustrates its use with 1970 census data, and discusses its implications for empirical research on city-suburb population redistribution. [ABSTRACT FROM AUTHOR]

This paper applies the techniques of multiple decrement life tables to marriage histories collected as part of the 1973 National Survey of Family Growth, in an attempt to examine differences in pattern and level of marriage dissolution by marriage order. The paper considers the process of marriage dissolution in two stages--marriage to separation and separation to divorce--in addition to considering the composite of these two, marriage to divorce. Second marriages are more likely to reamin intact only for blacks. For all subgroups of whites, second marriages are either as likely or more likely to dissolve than first marriages. For both first and second marriages, blacks are considerably less likely to obtain a divorce after separation. [ABSTRACT FROM AUTHOR]

Taking care to minimize the truncation bias inherent in cross-sectional data and controlling for other variables, this paper demonstrates the strong effects of both age and marital status at first birth on the pace of subsequent fertility. These effects are particularly strong in the interval immediately following the first birth but persist even into the fourth interval. Important differences are found with respect to the experience of rapid fertility, rather than in the mean lengths of intervals. These results add to the growing attention to the social dimensions of age as a variable in fertility processes. [ABSTRACT FROM AUTHOR]

In this paper, the actuarial method of multiple decrement life table analysis of censored, longitudinal data is examined. The discussion is organized in terms of the first segment of usage of an intrauterine device. Weaknesses of the actuarial approach are pointed out, and an alternative approach, based on the classical model of competing risks, is proposed. Finally, the actuarial and the alternative method of analyzing censored data are compared, using data from the Taichung Medical Study on Intrauterine Devices. [ABSTRACT FROM AUTHOR]

A population consisting of women who have conceived before a time t ignores all women whose conception time exceeds t. Such a population is considered as a truncated population, and the samples are called truncated samples. Under the assumption that fecundability among women varies according to a Beta distribution (with parameters a and b), the distribution of conception times in a truncated population can be considered as truncated Type I geometric. This paper presents an algorithm to obtain the moment and maximum likelihood estimates of a and b from the truncated samples. Large sample properties of the estimators are also studied. Examples using the Hutterite and the Princeton Fertility Survey data are given. [ABSTRACT FROM AUTHOR]

This paper studies the design effect of counting rules, for linking deaths to housing units where they are enumerated in the survey, on the sampling variance of dual system and single system estimators of death registration completeness. It investigates estimators based on conventional rules that uniquely link each death to a single housing unit as well as estimators based on multiplicity rules which permit deaths to be linked to more than one housing unit. Sampling variance formulas are derived containing parameters that reflect the efficiency of the counting rule. Estimates of these parameters for different counting rules are compared utilizing information that was collected in a mortality survey experiment. Finally, the design of a national death registration test is considered and the sample size implications of different counting rules are compared. [ABSTRACT FROM AUTHOR]

This paper has two principal aims: (1) to analyze and measure how the demographic variables-mortality, fertility, and immigration- affect the cost of education; (2) to evaluate what possibilities developing countries, such as those of Latin America, have for a rapid educational improvement. The paper relates demographic and educational variables of three different populations: Sweden, 1840-1965; the United States, 1850-1960; and Latin America, 1930-2000. Three educational variables are also cone sidered: (a) school attendance rates by sex and age; (b) distribution of students of same age by grade; and (c) cost of student by grade. Demographic changes in countries such as Sweden and the United States were favorable for the development of education. For the future, unless an increase of fertility occurs, mortality and fertility changes will not have a significant effect on the cost of education in these countries. In current less developed countries the demographic changes during the past were less favorable to educational development. A future reduction of fertility will significantly help them to achieve a higher educational level. [ABSTRACT FROM AUTHOR]

In recent decades, rapid growth of the U.S. Hispanic population has raised concerns about immigrant adaptation, including fertility. Empirical research suggests that Hispanics, especially Mexicans, might not be following the historical European pattern of rapid intergenerational fertility decline (and convergence toward native levels). If confirmed, continued high Hispanic fertility could indicate a broader lack of assimilation into mainstream American society. In this paper, we reexamine the issue of Hispanic and Mexican fertility using an approach that combines biological and immigrant generations to more closely approximate a comparison of immigrant women with those of their daughters' and granddaughters' generation. Contrary to cross-sectional results, our new analyses show that Hispanic and Mexican fertility is converging with that of whites, and that it is similarly responsive to period conditions and to women's level of education. In addition, we employ a mathematical simulation to illustrate the conditions under which cross-sectional analyses can produce misleading results. Finally, we discuss the import of the fertility convergence we document for debates about immigrant assimilation. [ABSTRACT FROM AUTHOR]

This study explores the ways in which women's contraceptive behavior in a rural area of Thailand is shaped by both past and present context, based on the life course framework. Although the importance of contextual influences for contraceptive behavior is well established in the literature, relatively little research has been conducted that explores how behavior is influenced by historical and contemporaneous contextual factors and by individual life experiences. In addition, much of this research has neglected the role of the normative environment within which contraceptive use takes place. The focus of this paper centers on the effect of contraceptive environment at both early and late stages of the life course and on how this effect is shaped by individual experience with migration to urban areas. This study takes advantage of a unique, prospective longitudinal data set with detailed information on community context at multiple points in time, an important improvement upon prior research. The results show that contraceptive behavior is particularly responsive to current community context, with past context primarily exerting an indirect effect on behavior through shaping current contextual influences. [ABSTRACT FROM AUTHOR]

Indian society suffers from substantial inequalities in education, employment, and income based on caste and ethnicity. Compensatory or positive discrimination policies reserve 15% of the seats in institutions of higher education and state and central government jobs for people of the lowest caste, the Scheduled Caste; 7.5% of the seats are reserved for the Scheduled Tribe. These programs have been strengthened by improved enforcement and increased funding in the 1990s. This positive discrimination has also generated popular backlash and on-the-ground sabotage of the programs. This paper examines the changes in educational attainment between various social groups for a period of nearly 20 years to see whether educational inequalities have declined over time. We use data from a large national sample survey of over 100,000 households for each of the four survey years--1983, 1987-1988, 1993-1994, and 1999-2000--and focus on the educational attainment of children and young adults aged 6-29. Our results show a declining gap between dalits, adivasis, and others in the odds of completing primary school. Such improvement is not seen for Muslims, a minority group that does not benefit from affirmative action. We find little improvement in inequality at the college level. Further, we do not find evidence that upper-income groups, the so-called creamy layer of dalits and adivasis, disproportionately benefit from the affirmative action programs at the expense of their lower-income counterparts. [ABSTRACT FROM AUTHOR]

In this paper, queuing theory is tested through an examination of the occupational attainment of six groups of non-whites in London and New York. Workers in the dominant economy are distinguished from those in the niche economy and emphasis is placed on the former. Black male immigrants in New York and black female immigrants in London hold more favorable occupational status. These results reflect differences in (1) the presence of indigenous minorities--African Americans and Puerto Ricans--in New York but not London, and (2) the relatively low position of indigenous minority males compared to the relatively middling position of indigenous minority females in New York's labor queue. [ABSTRACT FROM AUTHOR]

The growing study of leaving home in young adulthood in the United States has been hampered by data and measurement problems, which are producing a major theoretical confusion about the role of parental resources in influencing young adults' leaving home. Does high parental income retain young adults in the home or subsidize their leaving (and parental privacy)? This paper uses the 1984 panel of Survey of Income and Program Participation to clarify this issue, and shows that the effects of parental resources differ depending on the route out of the home under consideration (marriage or premarital residential independence). Effects change substantially over the nest-leaving ages, but relatively few differences are found between young men and young women. [ABSTRACT FROM AUTHOR]

This paper examines the ways in which the behavior of twentieth century cohorts of American women changed simultaneously in the three components of fertility that determine age at last birth--age at first birth, spacing between subsequent births, and parity progression ratios of subsequent births--to produce changes in the timing of the completion of childbearing. It decomposes changes in the mean age at last birth among cohorts and between whites and nonwhites to changes in these three components. To perform these analyses, we developed and applied a method to estimate the distributions and means of ages and last births, birth intervals, and parity progression ratios from age- and parity-specific fertility rates available from vital statistics data. Results show that the cohorts increased and decreased their age at first birth, birth intervals, and parity progression ratios of lower and higher birth orders in almost every possible combination so as to achieve a relatively young age at final birth. [ABSTRACT FROM AUTHOR]

In this paper the author examines the proposition that heterogeneity in individual frailty leads to autocorrelation in cohort mortality rates. A simple model is used to construct analytic expressions for the covariance of cohort mortality rates at different ages under a number of alternative assumptions about the stochastic process generating shocks in mortality. The model then is used to construct a procedure that uses correlations in cohort mortality rates to estimate the extent of heterogeneity in a population without relying on strong assumptions about the distribution of frailty or the shape of the underlying hazard. The procedure then is used to show that cohort mortality data from France are consistent with a generalized random-effects model in which frailty is gamma-distributed. [ABSTRACT FROM AUTHOR]

We use vital registration data published since 1979 to update trends in the timing of first births. Two important trends are documented. First, the likelihood that childless women over age 30 will have a first birth has increased since the 1970s. This change shows that women born in the 1950s are "catching up" on fertility postponed at younger ages. Second, racial differences in the timing of first births are very large. For those born in the 1950s, nonwhites have first births much earlier, and far fewer nonwhite than white women will remain permanently childless. In the second part of the paper, we use these data for recent years to assess earlier projections of childlessness based on cohort and period approaches. We also assess the accuracy of stated intentions to have no children. [ABSTRACT FROM AUTHOR]

This paper is an empirical exploration of the effects of a variety of family and economic circumstances experienced during childhood on one indicator of success in young adulthood--high school completion. The estimates suggest that parental education and mother's work are positive and significant determinants of high school completion, whereas growing up in a family with more children (who compete for resources), being persistently poor and on welfare, and moving one's residence as a child have significant negative impacts on high school completion. The effects of some family stress and economic events differ depending on the age of the child when they occur. The results support the economic model of investment in children, as well as the welfare culture and socialization models. [ABSTRACT FROM AUTHOR]

This paper extends work on measures of population proportions sterile to propose a new estimator of an individual woman's age at sterility and consequently her sterility status at given ages. Accuracy and reliability, examined in a simulation study, appear satisfactory. From World Fertility Survey data for five African countries, the proportions sterile by age estimated by the individual measure and by the population estimator are almost identical. Cameroon and Kenya show substantial variation in prevalence and incidence of sterility across ethnic groups and by number of marriages. Unexpectedly, the evidence suggests that sterility increased from 1960 on in Kenya and remained unchanged in Cameroon. [ABSTRACT FROM AUTHOR]

A detailed record of the number and characteristics of persons in poverty is available since 1959. This paper provides measures for 1939 and 1949 that correspond as closely as possible to the official poverty statistics. Poverty, as officially measured, fell from 40.5 percent of all persons in 1949 to 13.1 percent in 1979, declining most among the elderly and least among female-headed households. We estimate the effects on the aggregate poverty rate of changes between 1940 and 1980 in the distribution of the population by selected demographic characteristics of household heads and by the employment status of head and spouse. Some changes, such as the increasing proportion of two-earner families, were poverty reducing, whereas others were poverty increasing. [ABSTRACT FROM AUTHOR]

This paper develops and estimates an interactive contextual model of migration in Ilocos Norte, the Philippines. It focuses on how contextual features alter the effects of family class status and community development level on the family's migration decisions. The model estimates show a curvilinear relation between class status and migration, but the pattern differs in accordance with the prevalence of migration from the community in the past. In addition, the effects of socioeconomic development and agricultural commercialization patterns vary with context. These results demonstrate the importance of using interactive models for analyzing the contextual influences on migration. [ABSTRACT FROM AUTHOR]

This paper addresses the issue of the relationship of fertility between successive generations over the course of a 19th-century frontier fertility transition. Intergenerational event histories are used to explore the relationships between mothers' and daughters' completed family size. Results suggest that daughters' fertility levels are responsive to their mothers' relative fertility and age at marriage (as compared with mother's contemporaries). Effects of exposure to a number of younger siblings, controlling for cohort biases, are also examined. A multivariate proportional hazard analysis of daughter's age at marriage and parity-specific birth intervals demonstrates the direct and indirect effects of intergenerational fertility associations on fertility timing. [ABSTRACT FROM AUTHOR]

This paper examines the probabilities of first marriage dissolution in Canada, using the marital history data collected from a national sample of women in their reproductive years. It is found that age at marriage, year of marriage, cohabitation before marriage, a premarital birth or conception, urban-rural place of residence, and religiosity are all significantly correlated with marriage dissolution. Religion and education, on the other hand, do not seem to affect the marriage dissolution probabilities when other factors are controlled. Canadian patterns are not too different from patterns in the United States. [ABSTRACT FROM AUTHOR]

This paper, analyzes movements among household types. Persons in one household may join another type. Correspondingly, a household's structure may change when someone joins it. Data are from the Panel Survey of Income Dynamics, spanning `1968-1980. The individuals followed in the survey generated spells analyzed with a multivariate competing risk hazard model. We develop a map of the flow among household types and of the economic and demographic profiles of individuals making the transitions. We find wide variability in the stability of household types and marked racial differences in the relative stability and pattern of destination choices. [ABSTRACT FROM AUTHOR]

This paper examines relationships among six social factors and infant mortality in California in 1978 and seeks to explain social differentials in terms of two intervening variables. Linked birth and infant death records are analyzed to test for interactions among the social factors and mortality and for causal linkages involving the intervening variables. Social factors are related to the risk of infant mortality in a conditional manner; significant interactions involve maternal age and both birth order and marital status, and race/ethnicity and both education and marital status. Birth weight and prenatal care are important intervening variables but do not fully explain the social differentials. [ABSTRACT FROM AUTHOR]