Research 

1. Research Interests:

Microeconomics, Decision Theory, Game Theory, General Equilibrium 

2. Publications (refereed):

• Habit Formation, Self-Deception, and Self-Control, (joint with Takashi Hayashi), Economic Theory, Vol.74, pp.547-592, 2022.  

• Imprecise Information and Second-Order Beliefs, (joint with Takashi Ui), Communications in Economics and Mathematical Sciences, Vol.1, pp.67-86, 2022.  

• Optimal Discounting, (joint with Jawwad Noor), Econometrica, Vol.90, pp.585-623, 2022.  

• Comparative Impatience under Random Discounting, (joint with Youichiro Higashi, Kazuya Hyogo, and Hiroyuki Tanaka), Economic Theory, Vol.63, pp.621-651, 2017. 

• Learning the Krepsian State: Exploration through Consumption, (joint with Evan Piermont and Roee Teper), Games and Economic Behavior, Vol.100, pp.69-94, 2016. 

• Menu-Dependent Self-Control , (joint with Jawwad Noor), Journal of Mathematical Economics, Vol.61, pp.1-20, 2015. 

• A Theory of Subjective Learning, (joint with David Dillenberger, Juan Sebastian Lleras, and Philipp Sadowski), Journal of Economic Theory, Vol.153, pp.287-312, 2014. 

• Stochastic Endogenous Time Preference , (joint with Youichiro Higashi and Kazuya Hyogo), Journal of Mathematical Economics, Vol.51, pp.77-92, 2014. 

• Uphill Self-Control, (joint with Jawwad Noor), Theoretical Economics, Vol.5, pp.127-158, 2010. 

• Subjective Random Discounting and Intertemporal Choice, (joint with Youichiro Higashi and Kazuya Hyogo), Journal of Economic Theory, Vol.144, pp.1015-1053, 2009. 

• Comment on ``Ellsberg's two-color experiment, portfolio inertia and ambiguity", (joint with Youichiro Higashi, Sujoy Mukerji, and Jean-Marc Tallon), International Journal of Economic Theory, Vol.4, pp.433-444, 2008. 

• Subjective Probability over a Subjective Decision Tree, Journal of Economic Theory, Vol.136, pp.536-571, 2007. 

• Stationary Markov Equilibria on a Non-Compact Self-Justified Set, Journal of Mathematical Economics, Vol.42, pp.269-290, 2006. 

• On the Consistency of Stationary Markov Equilibria with an Exogenous Distribution, Journal of Economic Theory, Vol.113, p.316-324, 2003. 

3. Publications (non-refereed):

• An Axiomatic model of Subjective Learning, Journal of Behavioral Economics and Finance, Vol.5, pp.165-167, 2012. Proceedings, the 6th Annual Meeting. 

• A Note on Self-Control Preferences and its Application to Games, RIMS Kokyuroku, No.1788, pp.7-27, 2012. 

• A Note on Certainty Effect and Self-Control, RIMS Kokyuroku, No.1557, pp.71-92, 2007. 

• Stationary Markov Equilibria for Temporary Equilibrium Processes under Heterogeneous Expectations, RIMS Kokyuroku No.1165, pp.80-94, 2000. 

4. Working Papers:

• Time Inconsistency and Impure Benevolent Planner, (joint with Takashi Hayashi and Noriaki Kiguchi), October, 2022. pdf 

• Information Acquisition under Homogeneous Payoff-Dependent Costs, (joint with Youichiro Higashi and Kazuya Hyogo), June, 2022. pdf 

• Optimal Discounting with Negative Consumption Utility, (joint with Jawwad Noor), March, 2021. pdf 

• Costly Subjective Learning, (joint with Youichiro Higashi and Kazuya Hyogo), August, 2020. pdf 

• Constrained Optimal Discounting, (joint with Jawwad Noor), May, 2020. pdf   (Online Appendix pdf) 

• Self-Control Games , (joint with Takashi Ui), June, 2011. pdf   (Online Appendix pdf) 

• Temptation, Certainty Effect, and Diminishing Self-Control , September, 2006. pdf 
• This paper is combined with Noor and Takeoka "Uphill Self-Control". 

• Subjective Prior over Subjective States, Stochastic Choice, and Updating, November, 2004. Revised: May, 2005 pdf 
• This paper is combined with Dillenberger, Lleras, Sadowski, and Takeoka "A Theory of Subjective Learning". 

• Representation with a Unique Subjective Decision Tree, November, 2004. pdf