Langenbach, Pascal Max Planck Institute for Research on Collective Goods, Max Planck Society;
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4095660 (Any fulltext)
Friehe, T., Langenbach, P., & Mungan, M. C. (in press). Sanction Severity Influences Learning About Enforcement Policy: Experimental Evidence. Journal of Legal Studies.