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This paper analyzes internal migration in Mexico over the 1960-70 period. A model of the determinants of migration is specified and estimated for aggregated interstate migration flows. Results show that distance serves as a significant deterrent to migration, that higher destination earning levels are attractive to migrants, and that regions with high unemployment rates experience lower rates of inmigration. An unanticipated finding is that regions with higher earning levels have greater rates of outmigration. The data are disaggregated to examine separate migration relationships for each state. The results are that distance is a lesser deterrent for those migrants with more accessible alternatives, that higher earning levels reduce the deterring effects of distance, and that regions with higher earning levels have lower associated elasticities of migration. It is concluded that economic factors have played a crucial role in internal migration and thus in the changing occupational and geographic structure of the Mexican labor force.

"This paper presents and tests a regression-based model of black interstate migration. Explanatory variables include characteristics of origins and destinations, distance, and two migrant stock measures. The model is tested using black interstate migration flows published by the U.S. Bureau of the Census for 1965-70 and 1975-80." The emphasis is on the determinants of black migration, particularly for the period 1975-1980., (excerpt)

"The purpose of this paper is to analyze gross [U.S.] metropolitan migration of persons employed in selected...industries. An empirically testable model was developed for migration, employment change, and earnings change and implemented using data from the Social Security Administration's ten percent Continuous Work History Sample. The results showed that a significant percentage of the migration flows can be explained by the variables in the model.... Differences in cyclic and structural economic variables are noted in terms of their importance across the specified industries. The public policy implications of these results are identified.", (excerpt)

"The objective of this paper is to better understand the manner in which the supply of labor in a regional economy adjusts to changing labor demand. The principal response mechanisms include changed rates of labor force participation, changed unemployment rates, and migration....[Following a review of] the relevant literature...the simultaneous relationships among participation, unemployment, employment, and migration are formally recognized in a 10-equation model of the regional labor market adjustment process. The model is estimated for a sample of about 350 U.S. counties over the period 1960 to 1970.", (excerpt)

In empirical work on population migration, researchers have utilized many different measures of migration. 1 measure that is used periodically is an "an allocation rate", most commonly defined as the number of persons moving from origin i to destination j during the period. While an allocation rate is a valid and interesting measure, it has been misunderstood in several instances, leading to some empirical results that are difficult to interpret. In this paper, previous work on allocation rates is discussed, and 1 study is replicated for the 1975 to 1980 period. It is demonstrated that inclusion of origin variables in such models is theoretically incorrect and results in substantial biases in empirical work. Inclusion of ratios of destination-to-origin variables is valid only with a very narrow interpretation.