The research on comparative immigration policy is relatively recent, with the earliest dealing with significant immigrant inflows into Western Europe after World War II. Because of the difficulties in finding empirically grounded measures of immigration policy, the literature has grown primarily by adding to the theoretical literature. In terms of the immigration control literature, nativism (anti-immigrant preferences) has been complemented by approaches that include attention to the economic consequences of immigration, focus on how societal preferences are channeled, and focus on state national interest and state security. In terms of the immigrant integration literature, there has been a tendency to classify the immigrant reception environment of states according to historical nation building features of the state and to types of “immigration regimes.” More recently, in recognition of the static nature of these models of policy making, scholars have disaggregated integration policy into its component parts and incorporated aspects of politics that change over time. The research arena is, in short, theoretically rich, though both dimensions of research on immigration policy suffer from two flaws. The first is the inability to compare effectively policies across countries. The second is the research focus on Western Europe and advanced industrial countries, to the neglect of the remaining countries in the world.