Konrad, Kai A. Public Economics, MPI for Tax Law and Public Finance, Max Planck Society;
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2867898 (Any fulltext)
Geys, B., & Konrad, K. A. (2016). Patriotism and taxation. Working Paper of the Max Planck Institute for Tax Law and Public Finance, No. 2016-11.