The present study builds on the insights of two papers that were concurrently written: Beerli and Peri (2018) and Ruffner and Siegenthaler (2017). The first paper analyzed the employment, wage, mobility and occupational specialization effects of the labor market liberalization in Switzerland. The second studied the firm-level impact of the same reform, establishing its effects on the employment of foreigners within firms and on size, productivity, innovation, location and staffing decisions of firms. We are indebted to the editor and three referees for unusually helpful comments. We also thank the following for their many helpful comments and suggestions on the prior versions of this paper: