• Novelty-seeking Traits and Innovation (with Tat-kei Lai and Kenji Sato), RIETI Discussion Paper Series 18-E-073, October 2018. 

Related studies include: 

• Tourism, Capital / Labor Inflow, and Regional Development (with Kenji Kondoh and Shigemi Yabuuchi), CUIE Discussion Paper Series 1705, March 2018. 

• Innovation and Inequality in a Monetary Schumpeterian Model with Heterogeneous Households and Firms  (with  Angus C. Chu, Guido Cozzi, Haichao Fan, and Chih-Hsing Liao), MPRA Paper 84711, February 2018. 

• Can Trade Unions Increase Social Welfare? An R&D Model with Cash-in-Advance Constraints (with António Neto and Ana Paula Ribeiro), MPRA Paper 77312, March 2017. 

• Inflation, Unemployment and Economic Growth in a Schumpeterian Economy, with Angus C. Chu and Guido Cozzi, MPRA Paper 61175, January 2015.

• Chaotic Industrial Revolution Cycles and Intellectual Property Protection in an Endogenous-Exogenous Growth Model, with Makoto Yano, MQ Discussions Series 2013-11, November 2013.

• A Simple Theory of Offshoring and Reshoring (with Angus C. Chu and Guido Cozzi), MPRA Paper 44557, February 2013. 

• Technological Change and International Interaction in Environmental Policies (with Yasuhiro Takarada), MPRA Paper 55653, January 2013.  

• A Theory of Innovation through Global Collaboration and Wage Inequality, CUIE Paper 0905, 2010. (Unpublished Appendix)