6 IZA Discussion Papers
IZA Discussion Paper No. 12190
published in: I. Ganguli, S. Kahn, M.MacGarvie (eds.), The Roles of Immigrants and Foreign Students in US Science, Innovation, and Entrepreneurship,Chicago: University of Chicago Press, 2020, 149-172.
IZA Discussion Paper No. 7382
revised version published as 'The Value of Hiring through Employee Referrals' in: Quarterly Journal of Economics, 2015, 130(2), 805-839
IZA Discussion Paper No. 6715
IZA Discussion Paper No. 5726
published in: Journal of Economics and Management Strategy, 2013, 22 (2), 365-389
IZA Discussion Paper No. 3945
published in: Contemporary Economic Policy, 2010, 28 (3), 353-365
IZA Discussion Paper No. 345
published in: Schätzl L./J.R. Diez (eds.), Technological Change and Regional Development in Europe, Heidelberg (2001), 90-111