Foreign-owned firms (FoFs) can have significant implications in terms of employment, income and technology for the national economies involved. This book compares the efficiency of domestic and FoFs, and also looks at the performance of FoFs in several different countries. Contributors take a broad variety of research approaches with a focus on the use of firm-specific data from France, Germany, Austria, and Sweden. They conclude that foreign ownership matters but the real difference is not between FoFs and national firms but between multinational and domestic firms.