・”The Folk Theorem in Repeated Games with Endogenous Termination” (joint with Yosuke Yasuda, Osaka University.) (New!) October, 2018. Available at SSRN.
・"Exit Option can Make Cooperation Easier" (joint with Yosuke Yasuda, Osaka University and GRIPS.) February, 2015. Available at SSRN.
・"Diverse Behavior Patterns in a Symmetric Society with Voluntary Partnerships" (joint with Masahiro Okuno-Fujiwara, Musashino University) October, 2013. Available at SSRN.
・"Dynamic Noncooperative Group Formation with Size Advantage and Group Reputation" June, 2013. Available at SSRN.
・"Repeated Cooperation with Outside Options" (joint with Yosuke Yasuda, GRIPS.) April, 2012 version is here. December, 2011 version is available at SSRN.
・"Collusion under Payoff Fluctuations" (joint with Yosuke Yasuda, GRIPS.) May, 2012 version is available at SSRN.
・"Asymmetry of Customer Loss and Recovery under Endogenous Partnerships: Theory and Evidence" (joint with Henrich R. Greve, INSEAD, and Stefan Jonsson, Uppsala University. September, 2014 version). Forthcoming in International Economic Review. Extended version is available at SSRN.