Lang, Harald Public Economics, MPI for Tax Law and Public Finance, Max Planck Society;
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2876504 (Any fulltext)
Lang, H. (2016). You are not alone: experimental evidence on risk taking when social comparisons matter. Working Paper of the Max Planck Institute for Tax Law and Public Finance, No. 2016-12.