Mixed Oligopoly and Productivity-Improving Mergers

This paper investigates productivity improving merger activities between a public firm and a private firm in mixed oligopoly. We assume that the merged firm has two plants (formerly, firms). We show that both owners of a public firm and a private firm want to merge by coordinating their shareholding ratios in the merged firm, whenever the number of private firms is larger than a critical value, while the public firm does not want to merge without the effect of improving the productivity of the merged firm.mixed oligopoly

Endogenous Timing in a Mixed Duopoly: The Managerial Delegation Case

We introduce managerial delegation into Pal's (1998) model and examine the impact of the introduction of managerial delegation on endogenous timing in a mixed duopolistic model for differentiated goods. We show that a public firm and a private firm choose quantities sequentially in the equilibrium of our model. Thus, we find that the Pal''s (1998) results are robust against managerial delegation.Endogenous Timing

Gravitational Waves in F(R)F(R) Gravity: Scalar Waves and the Chameleon Mechanism

We discuss the scalar mode of gravitational waves emerging in the context of $F(R)$ gravity by taking into account the chameleon mechanism. Assuming a toy model with a specific matter distribution to reproduce the environment of detection experiment by a ground-based gravitational wave observatory, we find that chameleon mechanism remarkably suppresses the scalar wave in the atmosphere of Earth, compared with the tensor modes of the gravitational waves. We also discuss the possibility to detect and constrain scalar waves by the current gravitational observatories and advocate a necessity of the future space-based observations.Comment: 15 pages, 5 figures, accepted version in Physical Review

Studies on molecular mechanisms of induction of bovine luteal cell apoptosis by oxidative stress

Thesis (Ph. D. in Science)--University of Tsukuba, (A), no. 2779, 2002.3.25Includes bibliographical reference