The objective of this paper is to describe and understand the determinants of changes in the number and quality of new legal immigrants to the United States over the last 25 years. Our main interest is in understanding the behavioral response of potential immigrants to changes in the U.S. immigration law regime (as well as in the origin-country determinants of demand for immigration to the United States) and how these affect and have affected the skill composition of immigrants. By understanding how the composition of legal immigrant flows shifts in response to immigration law changes, particularly in numerically unrestricted immigration categories, a better understanding of the consequences of future immigration reforms may be attained. We assemble a new data set based on annual INS re...
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