Yuichi Fukuta, Wenjie Ma. Implied Volatility Smiles in the Nikkei 225 Options. Applied Financial Economics. 2013
Yuichi Fukuta, Hiroshi Nakaota. An Empirical Study on Stabilities of the Predictive Role of the Yield Spread for Future Economic Activity and the Monetary Policy Stance in Japan. Discussion Papers In Economics And Business. 2012