NORTH AMERICA.

The article presents abstracts of various papers related to migration in North America. One of the papers discussed is "Interstate Migration of Labor-Force Age Population," by David F. Bramhall and Herrington J. Bryce. The authors find that migration from a state is closely linked to the size of population by age groups rather than to economic conditions. Immigration rates into states, on the other hand, are importantly determined by employment opportunities. Other findings are that the propensity of non-whites of labor-force age to migrate is less than that of whites, and whites are generally more responsive to changes in employment opportunities among states than are non-whites. Another paper discussed is "An Analysis of the Determinants of Geographic Labor Mobility in the United States," by Michael J. Greenwood. The study aims to estimate the magnitudes of each of several factors influencing interstate migration over the period 1955-1960. Multiple regression analysis was used on several variables, which might reasonably be expected to explain the movements, which occurred. The most unique explanatory variable employed is the migrant stock, that is, the number of persons born in State i and living in State j. Failure to include the migrant stock variable in the estimated relationships causes the true direct effect of most other variables to be obscured.