Brookins, Philip Max Planck Institute for Research on Collective Goods, Max Planck Society;
https://doi.org/10.1016/j.jebo.2015.02.006 (Any fulltext)
Brookins, P., Lightle, J. P., & Ryvkin, D. (2015). Optimal sorting in group contests with complementarities. Journal of Economic Behavior and Organization, 112, 311-323.