In this paper, we consider the problem of selecting explanatory variables of fixed effects in linear mixed models under covariate shift, which is the situation that the values of covariates in the predictive model are different from those in the observed model. We construct a variable selection...

　　 A multivariate stochastic volatility model with the dynamic correlation and the cross leverage effect is described and its efficient estimation method using Markov chain Monte Carlo is proposed. The time-varying covariance matrices are guaranteed to be positive denite by using a...

This paper investigates the extent, determinants, and implications of the political connections of firms at the peak of democracy in prewar Japan, identifying a firm as politically connected if one of its directors was simultaneously a member of the House of Representatives. We analyze the data...

This paper simulates the power source mix of Japanese electricity in the year of 2023 based on the information publicly available from electricity companies and electric power system council. It evaluates eight scenarios based on three important parameters for the Japanese electricity market:...

This paper provides the optimal position management strategy for a market maker who has to face uncertain customer orders in an “illiquid†market, where the market maker’s continuous trading through a traditional exchange incurs stochastic linear price impacts. In addition, it...

La Porta et al see Anglo-American common law as most favourable to economic development, but in 1899 Japan explicitly preferred the German corporate law tradition. Yet its new Commercial Code omitted the GmbH (private company) form, which Guinnane et al see as the jewel in the crown of...

The wide use of RFM analysis in CRM suggests that these measures contain rather rich information about customer purchase behavior. This research, using the RFM measures of a customer, develops an individual-level CLV model that identifies the underlying behavior traits of purchase rate, lifetime...

‘Abenomics' refers to a new unconventional economic policy regime in Japan since late 2012. It consists of the three arrows: unconventional monetary policy (the first arrow), expansionary fiscal policy (the second arrow), and economic growth strategies to encourage private investment (the...

In this paper, we explore whether unconventional monetary policy in Japan had a negative spillover effect on the rest of the world. After Prime Minister Abe advocated the new policy regime, the Japanese yen depreciated substantially which raised a concern that it would have a beggar-thy-neighbor...

The problem of estimating the large covariance matrix of both normal and non-normal distributions is addressed. In convex combinations of the sample covariance　matrix and the identity matrix multiplied by a scalor statistic, we suggest a new　estimator of the optimal weight based on...