Go, Kotera; Okada, Keisuke and Samreth, Sovannroeun (2010): A panel study on the relationship between corruption and government size. Unpublished.
Kotera, Go; Okada, Keisuke and Samreth, Sovannroeun (2010): A study on the relationship between corruption and government size: the role of democracy. Unpublished.
Okada, Keisuke and Samreth, Sovannroeun (2011): A study on the socio-economic determinants of suicide: Evidence from 13 European OECD countries. Unpublished.
Kunieda, Takuma; Okada, Keisuke and Shibata, Akihisa (2011): Corruption, Globalization, and Economic Growth: Theory and Evidence. Unpublished.
Iwata, Hiroki; Okada, Keisuke and Samreth, Sovannroeun (2010): Empirical Study on the Determinants of CO2 Emissions: Evidence from OECD Countries. Unpublished.
Iwata, Hiroki; Okada, Keisuke and Samreth, Sovannroeun (2009): Empirical Study on the Environmental Kuznets Curve for CO2 in France: The Role of Nuclear Energy. Unpublished.
Kunieda, Takuma; Okada, Keisuke and Shibata, Akihisa (2011): Finance and Inequality: How Does Globalization Change Their Relationship? Unpublished.
Iwata, Hiroki and Okada, Keisuke (2010): Greenhouse gas emissions and the role of the Kyoto Protocol. Unpublished.
Okada, Keisuke and Samreth, Sovannroeun (2010): How Does Corruption Influence the Effect of Foreign Direct Investment on Economic Growth? Unpublished.
Iwata, Hiroki and Okada, Keisuke (2010): How does environmental performance affect financial performance? Evidence from Japanese manufacturing firms. Unpublished.
Okada, Keisuke and Samreth, Sovannroeun (2011): The effect of foreign aid on corruption: A quantile regression approach. Unpublished.
