There are more than 1,700 municipalities serving as insurers in Japan's system of National Health Insurance (NHI). The NHI has several institutional routes to buffer local premiums from abrupt changes in regional health demands that destabilize the NHI benefit expenditures. After briefly...

This paper is concerned with estimation of a predictive density with parametric constraints under Kullback-Leibler loss. When an invariance structure is embed- ded in the problem, general and unied conditions for the minimaxity of the best equivariant predictive density estimator are derived....

In this paper, we have studied the pricing of a continuously collateralized CDS. We have made use of the "survival measure" to derive the pricing formula in a straightforward way. As a result, we have found that there exists irremovable trace of the counter party as well as the investor in the...

Forecasting welfare caseloads has grown in importance in Japan because of their recent rapid increase. Given that the forecasting literature on welfare caseloads only focuses on US cases and utilizes limited classes of forecasting models, this study employs multiple alternative methods in order...

We revisit Machina's local utility as a tool to analyze attitudes to multivariate risks. Using martingale embedding techniques, we show that for nonexpected utility maximizers choosing between multivariate prospects, aversion to multivariate mean preserving increases in risk is equivalent to the...

Our investigation concerns the estimation of predictive densities and a study of effiency as measured by the frequentist risk of such predictive densities with integrated L2 and L1 losses. Our findings relate to a p-variate spherically symmetric observable X ∼ px (||x -μ||2) and the...

　　 The realized stochastic volatility model of Takahashi, Omori, and Watanabe (2009), which incorporates the asymmetric stochastic volatility model with the realized volatility, is extended with more general form of bias correction in realized volatility and wider class...

Estimates of the extent of the corporate economy in eightyâ€one countries in 1910, when the number of corporations globally reached about half a million, show that the US and the British Empire alone accounted for threeâ€quarters of these. The aggregate market value of approaching a...

In this paper, we suggest the new variable selection procedure, called MEC, for linear discriminant rule in the high-dimensional setup. MEC is derived as a second-order unbiased estimator of the misclassication error probability of the lin- ear discriminant rule. It is shown that MEC not only...

　　 This paper develops a new scheme for improving an approximation method of a probability density function, which is inspired by the idea in<em> the Hilbert space projection theorem</em>. Moreover, we apply “Dykstra's cyclic projections algorithm†for its implementation....