A NOTE ON SPECIFICATION OF CLIMATE VARIABLES IN MODELS OF POPULATION MIGRATION*
分析了人口迁移研究中常用的多种温度变量设定方式，通过统计检验比较不同模型，并用于分析1975-1980年美国48个州之间的迁移数据。
"In the literature on population migration, increasing attention has been devoted to quality-of-life factors. Measures of temperature (as proxies for climate) have frequently been employed in empirical work regarding the determinants of population migration decisions. A wide range of such specifications have been used, most of which imply restrictions on the preferences of migrants. In this paper, a variety of temperature variable specifications are analyzed and interpreted. Statistical tests for nested and nonnested hypotheses are used to compare and choose among the various specifications." The model is used to analyze interstate migration in the 48 contiguous states of the United States for the period 1975-1980.