This book explores the role of entrepreneurship in economic and social integration of post-Soviet immigrants in the European Union, and the ways in which national institutions influence these processes. The book traces the development of economic models and immigration policies in Austria, Spain, and Hungary and their influence on post-Soviet immigration and entrepreneurship in these countries. As such, the book provides an interdisciplinary approach in the study of institutions relevant to students, researchers and practitioners interested in the economics of migration, labor economics, and the political economy.