TSUKADA Naotoshi

TSUKADA Naotoshi

TSUKADA Naotoshi

Research Associate

Associate Professor, National Graduate Institute for Policy Studies (GRIPS)

Activities at RIETI


Economics of Innovation, Industrial Organization

Research Projects


2011 Ph.D., Economics, Hitotsubashi University
2002 M.A., Economics, Hitotsubashi University
2000 B.A., Economics, Yokohama National University


April 2013 - Present Research Associate, RIETI
April 2010 - Present Fellow, RIETI
April 2010 - Present Lecturer Takachiho University
April 2008 - March 2010 Research Associate, Institute of Innovation Research, Hitotsubashi University
April 2007 - March 2008 Research Fellow, Institute of Intellectual Property

Selected Publications and Papers

Articles in Books

"The Structure and the Emergence of Essential Patents for Standards: Lessons from three IT standards," (with Sadao Nagaoka and Tomoyuki Shimbo), in Uwe Canter, Jean-Luc Gaffard, Lionel Nesta eds. Schumpeterian Perspectives on Innovation, Competition and Growth, Springer, August 2009, pp.433-447.

Working Papers

"Standards as a Knowledge Source for R&D: A first look at their incidence and impacts based on the inventor survey and patent bibliographic data", (with Sadao Nagaoka), RIETI Discussion Paper Series 11-E-018.

"Spillover and Risk of an R&D Project and Targeting of Public R&D support," (Japanese) (with Sadao Nagaoka), RIETI Discussion Paper Series (forthcoming)

"International R&D Collaborations in Asia: A first look at their characteristics based on patent bibliographic data," (with Sadao Nagaoka), ERIA Discussion Paper series (forthcoming).

"Whether and How Does International Research Collaboration Affect Invention Performance? Some evidence from triadic patent data," (with Sadao Nagaoka), Hitotsubashi University IIR Working Paper (forthcoming)

"Innovation Process in Japan: Findings from the RIETI Inventor Survey," (Japanese) (with Sadao Nagaoka), RIETI Discussion Paper Series 07-J-046