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In this paper, we use data from U.S. decennial censuses and March Supplements to the Current Population Surveys (CPS) of 19951999 to examine the historic patterns of immigrant settlement within the United States, recent shifts in these patterns, and the extent to which changes are due to international versus internal migration, focusing particularly on California. We examine the characteristics of internal migrants, comparing those moving out, those moving in, and those staying put. We also revisit briefly the so-called "welfare magnet" theory to see if immigrants are drawn to states with the strongest safety nets for immigrants.