Bertola/Caballero (1994) and Abel/Eberly (1996) extended Jorgenson's classical model of firms' optimal investment. By introducing investment frictions, they were able to capture the role of future anticipations in investment decisions as well as the lumpy and intermittent nature of investment...

This is a short essay motivated by the author's concern about the creation of a new series of lumpy credit risk exposures entering Japanese bank portfolios, in particular through recent c omeback of real estate transactions. The essay will be printed in "Keizai Kyousitsu" of the Nikkei Morning...

We propose a Separation Theorem of Active Management. It asserts that in the so-called Enhanced Active Portfolio framework the efficient frontier is linear in the active return/active risk space, and one can separate the determination of optimal active portfolio weights from the determination of...

In recent years, empirical researchers show that the higher credit risk, the lower the cross-sectional average stock returns. Although it seems that this result is puzzling in a standard financial pricing theory, we show that, in a production based model with a zero-coupon bond, negative...

This paper proposes a structural model to price credit risk of firms with short-term and long -term debts. In Ikeda, Kobayashi, and Takahashi (2005), since it assumed that the short-term debt is refunded by issuing a new short-term debt only, the future face value of the short-term debt depends...

This paper formulates and analyzes a dynamic optimization problem of bond portfolios within Markovian Heath-Jarrow-Morton term structure models. In particular, we investigate optimal yield curve strategies analytically and numerically, and provide theoretical justification for a typical strategy...

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...

In this article I provide the definition of market efficiency in its broadest spectrum. Instead of surveying the vast literature on where the actual market conforms to the prediction of the finance theory and where it does not, I explore the conceptual issues surrounding the idea of efficient...

This paper shows the analytical solution of a bond price with postponement of redemption by considering the special case of Ikeda and Kobayashi (2007). We can derive the solution by solving a Wiener-Hopf type integral equation, and such derivation does not have an example in others. Therefore...

This paper is written as a tribute to Professors Robert Merton and Myron Scholes, winners of the 1997 Nobel prize in Economics, as well as to their collaborator, the late Professor Fischer Black. We first provide a brief review of their option pricing theory and illustrate how it is different...