The International Migration Policy And Law Analysis (IMPALA) Database is a cross-national, cross-institutional, cross-disciplinary project on comparative immigration policy. The pilot database version covers 10 years and 9 country cases including Australia, France, Germany, Luxembourg, Netherlands, Spain, Switzerland, United Kingdom, and the United States of America. It covers The focus is admission policy, although the authors include also acquisition of citizenship, which is generally understood as being part of ‘immigrant policies’, namely what happens after admission. The project classifies and measures tracks of entry associated with five migration categories: economic migration, family reunification, asylum and humanitarian migration, and student migration, as well as acquisition of citizenship. It is the product of an international collaboration between researchers from George Mason University, Harvard University, London School of Economics and Political Science, Paris School of Economics, University of Amsterdam, University of Luxembourg, and University of Sydney.