This paper studies the probability distribution and option pricing for drawdown in a stochastic volatility environment. Their analytical approximation formulas are derived by the application of a singular perturbation method (Fouque et al. [7]). The mathematical validity of the approximation is...

This paper proposes a new approach to style analysis by utilizing a general state space model and Monte Carlo filter. In particular,We regard coefficients of style indices as state variables in the state space model and apply Monte Carlo filter as estimation method. Moreover, an empirical...

This paper proposes a new hedging scheme of European derivatives under uncertain volatility environments, in which a weighted variance swap called the polynomial variance swap is added to the Black-Scholes delta hedging for managing exposure to volatility risk. In general, under these...

The well-publicized Christie-Schultz collusion hypothesis provides an experiment for studying the determinants of market structure in Nasdaq markets. Some markets experienced substantial compression in the profit margins for market makers due to the change of quoting convention from odd-eighth...

Previous research exploring the effect of corporate leniency programs has modelled the oligopoly stage game as a Prisoners' Dilemma. Using numerical analysis, we consider the Bertrand price game and allow the probability of detection and penalties to be sensitive to firms' prices. Consistent...

The Japanese Government reports the annualized estimates of the growth rates of GDP and its main components once in 3 months, and then revises them once in a while. There have been some critical comments on the accuracy of those numbers mainly from economists who want to evaluate the current...

For estimating the realized volatility and covariance by using high frequency data, we have introduced the Separating Information Maximum Likelihood (SIML) method when there are possibly micro-market noises by Kunitomo and Sato (2008a, 2008b, 2010a, 2010b). The resulting estimator is simple and...

In this study, we analyze suicide rates among OECD countries with a particular effort made to gain insight into how suicide in Japan is different from suicides in other OECD countries. Several findings emerged from fixed effect panel regressions with country specific time-trend. First, the...

In this article, we review economic theories and empirical studies on the socioeconomic aspects of suicide. Through our survey, we would like to emphasize the importance of studying suicide by employing a "rational" approach that complements the medical perspective on suicide, which assumes...

This article investigates the abrupt jump in the number of suicide cases in Japan in 1998 and the subsequent persistency of this figure by utilizing a generalized decomposition formula. In particular, by considering the change in the demographic structure, we decompose the 1998 jump in the...