Dwenger, Nadja Public Economics, MPI for Tax Law and Public Finance, Max Planck Society;
http://ssrn.com/abstract=2192422 (Any fulltext)
Dwenger, N., Kübler, D., & Weizsäcker, G. (2012). Preference for Randomization: Empirical and Experimental Evidence. Working Paper of the Max Planck Institute for Tax Law and Public Finance, No. 2012-14.