5 IZA Discussion Papers
IZA Discussion Paper No. 17425
IZA Discussion Paper No. 16345
IZA Discussion Paper No. 10517
revised version published in: Experimental Economics, 2018, 21( 1), 99 -131
IZA Discussion Paper No. 10072
revised version published in: Journal of Applied Econometrics, 2019, 34, 707-72