Symmetric Cournot oligopoly and economic welfare: a synthesis

Summary Recently, Mankiw-Whinston (1986) and Suzumura-Kiyono (1987) have shown that socially excessive firm entry occurs in unregulated oligopoly. This paper extends this excess entry results by looking into strategic aspects of costreducing R&D investment that creates incentives towards socially excessive investments. In the first stage, firms decide whether or not to enter the market. In the second stage, firms make a commitment to cost-reducing R&D investment. In the third stage, firms compete in output quantities. It is shown that the excess entry holds even in the presence of strategic commitments.This is the synthesized version of the two earlier papers, Okuno-Fujiwara and Suzumura (1988) and Suzumura (1991). We are grateful to Professors J. Brander, D. Cass, M. Majumdar, A. Postlewaite, J. Richmond, A. Sandmo, B. Spencer and J. Vickers for their helpful comments and discussions on earlier drafts. Needless to say, they should not be held responsible for any remaining defects. Financial supports from the Japan Center for Economic Research, Tokyo Center for Economic Research, the Japanese Ministry of Education, and the Institute for Monetary and Economic Research, the Bank of Japan are gratefully acknowledged.     

Do the Rich Save More in Japan? Evidence Based on two Micro Data Sets for the 2000s

Using two household surveys, this paper investigates whether the saving rates of richer households are higher than those of poorer households in Japan. We construct a number of proxies for lifetime wealth, including those original to this study, and find marginally positive correlations between saving rates and lifetime wealth for working age households. We further find that the relationship between saving rates and lifetime wealth differs depending on the life stage of individual households. Older households with higher lifetime wealth appear to be dissaving to some extent, which is more or less consistent with the lifecycle model of consumption.     

Internet resources and capabilities: Japanese SME risk-taking,industry and performance

This study investigates how Internet-related resources and capabilities are influencing performance in Japanese small- and medium-sized enterprises (SMEs). We use a structural equation modelling approach to test these relationships between Internet readiness, Internet capability, risk-taking perceptions and performance within Japanese SMEs (350 SMEs). Unlike other counterpart countries, such as South Korea, Japanese SMEs have been relatively slow in implementing Internet technologies into business practice. However, the results indicate that if Japanese SMEs allocate appropriate resources and deploy Internet capabilities these firms will benefit with performance gains. Further, we find that both the perception of risk-taking and the industry in which the firm operates are key factors in either inhibiting or enhancing the firm’s ability to leverage Internet-related capabilities for firm performance.     

Computability of simple games: A characterization and application to the core

The class of algorithmically computable simple games (i) includes the class of games that have finite carriers and (ii) is included in the class of games that have finite winning coalitions. This paper characterizes computable games, strengthens the earlier result that computable games violate anonymity, and gives examples showing that the above inclusions are strict. It also extends Nakamura’s theorem about the nonemptyness of the core and shows that computable games have a finite Nakamura number, implying that the number of alternatives that the players can deal with rationally is restricted.     

An equilibrium price model of spot and forward shipping freight markets

We focus on non-storability, a characteristic of shipping freight that leads to an enormous gap between the widely-used no-arbitrage pricing theory and shipping freight derivative markets. Our main contribution is to modify and generalize the Bessembinder and Lemmon (2002) model. Equilibrium spot and forward price formulae are derived in a shipping freight market where shipowners, charterers, and speculators are non-homogeneous. From our formulae, we also obtain the properties of the forward risk premium and an optimal hedge ratio. In addition, we use the model to quantify the risk attitude of market participants.     

Optimal Commodity Taxation in the Presence of Tourists

Abstract

This paper explores empirically whether Japanese consumers became more prudent in the second half of the 1990s, a decade in which Japan registered historically low economic growth. Employing the methodology developed by Dynan (1993), this study uses micro-level data from the Family Savings Survey and the Family Income and Expenditure Survey to estimate the coefficient of prudence for Japanese households in the second half of the 1990s. The estimates reveal that the coefficient of prudence is positive and statistically significant in the 1998–1999 period. The obtained value for the coefficient of prudence is four, which is much higher than that estimated for US households (not significantly different from zero) or UK households (around 2). The estimated coefficient for young households is higher still, which is consistent with simulation studies conducted by Gourinchas & Parker (2002) showing that precaution is the most important saving motive for younger households.     

How Large Is the Cost of Business Cycles in Developing Countries?

This study measures the cost of business cycles in developing countries. The business‐cycle component of consumption is extracted by employing a detrending filter adjusted for the length of a subject country's business cycles, rather than a standard detrending filter, and the cost of business cycles using the extracted component is extracted. Estimated costs in developing countries based on the adjusted filter are found to be significantly different from those based on the standard filter. Hence, in measuring the costs of business cycles in developing countries, we should be careful about the choice of a detrending filter. The results also indicate the following findings: 1) in developing countries, there is probably more room to improve the cost of non‐business‐cycle fluctuations than that of business‐cycle fluctuations, and 2) the cost of business cycles is not strikingly large, even when it is estimated from a model strongly disfavoring business cycles.     

Intergenerational Transfers and Asset Inequality in Japan: Empirical Evidence from New Survey Data

This paper quantitatively examines the impact of intergenerational transfers on asset inequality among Japanese households. We estimate an intergenerational asset transfer function with various control variables, using a unique micro dataset taken from a survey conducted by the Economic and Social Research Institute, Cabinet Office. Employing three different models, a Tobit model, an interval regression model and an ordered probit model, to ensure that our results are independent of the specific econometric approach used, we investigate whether asset transfers received are correlated with households’ financial strength. We find that higher income households are likely to receive larger asset transfers. However, the contribution of intergenerational transfers to asset inequality appears to be small.