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Mutual fund investors assess a fund manager’s skills when allocating their capital. To identify the rationale behind retail investors’ decisions, this study aims to examine the relation between mutual fund flows and abnormal returns (alpha), as well as the various risk factors in the Japanese mutual fund market, which has distinctive characteristics regarding investors and distributors.

Six standard asset pricing models are used to investigate how investors assess mutual fund managers’ skills: the market-adjusted return, the capital asset pricing model and the Fama–French three-factor model and its augmented versions.

Contrary to the literature, this study finds that investors in Japan mainly rely on alpha to assess mutual funds. In particular, investors respond to alpha for fund inflows and their evaluations depend on the market environment and their mutual fund search costs.

This study measures the response of investors to the skills of mutual fund managers in the Japanese market – especially for funds purchased through bank-related distributors that have aimed to capture inexperienced retail investors since deregulation in the 1990s – and reveals their high response to alpha.

This study theoretically investigates the impacts of tax benefits on funding level and risk-taking of a corporate defined benefit (DB) pension plan.

The present value of the future tax benefits is maximized while the stockholders determine the funding level and investment risk-taking in DB plans. As a feature of DB plans, this study considers pension benefits to be pre-determined. Further, the pension beneficiary has a priority over the sponsor company's creditors for the pension reserve fund. These are seldom considered in previous studies.

It is desirable to decrease the funding level of DB plans to increase tax benefits. This is because the effect of tax exemption for the pension fund's investment income is eliminated by the change in the contribution arising from the investment's result. The optimal investment risk-taking depends on the funding level.

The impact of tax benefits on decision-making for DB plans is significantly different from that stated by previous studies, that is, an increase in pension funds will reduce the corporate debt. To explain corporate behavior, this study's results—derived from the essential feature of DB plans, which could not have been included in previous studies—should be considered.

The purpose of this paper is to theoretically examine the risk-taking decision of corporate defined benefits (DB) plans. The equity holders’ investment problem that is represented by the position of a vulnerable option is solved.

The simple traditional contingent claim approach is applied, which considers only the distributions of corporate cash flow, without the model expansions, such as market imperfections, needed to explain the firms’ behavior for DB plans in previous studies.

The authors find that the optimal solution to the equity holders’ DB investment problem is not an extreme corner solution such as 100 percent investment in equity funds as in the literature. Rather, the solution lies in the middle range, as is commonly observed in real-world economies.

The major value of this study is that it develops a clear mechanism for obtaining an internal solution for the equity holders’ DB investment problem and it provides the understanding that the base for corporate investment behavior for DB plans should incorporate the fact that in some cases the optimal solution is in the middle range. Therefore, the corporate risk-taking behavior of DB plans is harder to identify than the results of the empirical literature have predicted.