Research Fields
- Microeconomics
Degree
- Ph.D. in Economics (University of Tokyo)

Research Interests
- Entry deterrence in a differentiated market
- Herd behavior of economic forecasters
- Rationality of macroeconomic forecasts
Lectures and Seminars
Teaching Experience
Introductory Economics (Undergraduate)
This course is designed to help students obtain basic knowledge of microeconomics and macroeconomics.
Modern Economics (Graduate/Postgraduate)
This course is designed to help students learn advanced topics of microeconomics.
Seminars (Undergraduate)
This course is designed to help students learn effective communication skills using a combination of lecture, discussion, and hands-on practice. Text: “Nenji Keizai Zaisei Houkoku (in Japanese)”
Seminars (Graduate/Postgraduate)
This course is designed to help students write academic papers. The goal is to write academic papers publishable in renowned international journals.
Publications
- “Lock! Risk-Free Arbitrage in the Japanese Racetrack Betting Market,” (2015) J. of Sports Economics, 16(3), 322-330.
- “Testing homogeneity of Japanese CPI forecasters,” (2010) J. of Forecasting, 29(5), 435-441 (lead article).
- “Strategic Bias and Professional Affiliations of Macroeconomic Forecasters,” (2009) J. of Forecasting, 28(2), 120-130.
- “Forecast Accuracy and Product Differentiation of Japanese Institutional Forecasters,” (2006) Int. J. of Forecasting, 22(2), 395-401.
- “Are 16-Months-Ahead Forecasts Useful? A Directional Analysis of Japanese GDP Forecasts,” (2006) J. of Forecasting, 25(3), 201-207.
- “Testing the Rationality of Forecast Revisions Made by the IMF and the OECD,” (2006) J. of Forecasting, 25(1), 25-36.
- “Testing the Rationality of Japanese GDP Forecasts: The Sign of Forecast Revision Matters,” (2003) J. of Econ. Behav. & Org., 50(2), 263-269.
- “Herd Behavior of Japanese Economists,” (2001) (with Takero Doi) J. of Econ. Behav. & Org., 46(3), 343-346.
- “Weak Entrants Are Welcome,” (2000) Int. J. of Ind. Org., 18(6), 975-984.
Contact
ashiya(at)econ.kobe-u.ac.jp
Office hours
Please make an appointment in advance.