4 IZA Discussion Papers
IZA Discussion Paper No. 16832
revised version forthcoming in: Resources Policy.
IZA Discussion Paper No. 14212
published in: Empirical Economics, 2022, 62, 1123 - 1146
IZA Discussion Paper No. 12228
IZA Discussion Paper No. 9616
revised version published in European Economic Review 90, November 2016, 280-301; doi:10.1016/j.euroecorev.2016.03.008