• "Can growth heal the political divide?" with Dimitrios Xefteris. Working paper, March 2024. 

We measure political polarization by the cost that agents are willing to incur to advance their ideas, and we relate it to economic growth.  

• "Efficiency in collective decision-making via quadratic transfers", with N. Immorlica, S. Lalley, K. Ligett, G. Weyl and D. Xefteris. ArXiv 2301.06206 working paper, January 2023.

In a collective choice problem with multiple alternatives, a mechanism with quadratic transfers implements the utilitarian optimum. An earlier version with complete information here. 

•  "Voter polarization and extremism", with Tai-Wei Hu. Revise and resubmit, Economic Journal. Revised August 2025. 

Voters who face costs of processing information optimally ignore small signals, and as a result, they end up polarized into extreme positions.

•  'k-proper equilibria', with A. Nicolò. SSRN wp 2531741, 2014. Latest version: September 2020. 

We introduce a family of equilibrium refinements that are stronger than Selten's trembling hand perfection but weaker than Myerson's proper equilibrium.