- Adrian's current research investigates the determinants of immigration policies in wealthy advanced democracies around the world, an issue highly relevant to current debates on immigration and refugee flows. In contrast to much of the existing literature on immigration that tends to focus on native voters' preferences for immigration, his research program has focused on the role of labor-intensive firms in immigration policymaking. He classifies firms into two broad categories, firms that face competition in the international goods market (tradable sector) and firms that offer domestic services that cannot be traded (non-tradable sector). Using new data on immigration policy and field research in the Netherlands and Scandinavia, The theoretical framework of the project is not limited to the U.S. and Canada, but is generalizable across a variety of cases. Adrian's more recent work lies in the political economy of inequality and redistribution.