Market competition,differences in technology,and productivity improvement: An empirical analysis based on Japanese manufacturing firm data

In this paper we examine empirically the effect of market competition on firm productivity improvements using data drawn from the Japanese manufacturing sector. We find that a non-linear relationship between competition and productivity growth induced by R&D activity as suggested by Aghion et al. (2005) holds for Japanese manufacturing firms. We also show that greater market competition widens technology differences across firms, and firms facing more intense competition are more productive than other firms. Our empirical results imply that productivity improvement through R&D activity depends on not only a competitive environment but also technological differences between firms.     

The differences in the economic effects between the DB plan and the DC plan

This paper investigates the differences between the defined benefit plans (DB) and the defined contribution plans (DC) in the enterprise pension programs in Japan. Attention is paid not only to the effect of labor turnover but also to the difference in various categories of workers, which are classified by gender, education, timing of labor turnover, etc. Also, we take into consideration the effect of interest rates. One important conclusion of this paper is that the DC plan is superior to the DB plan, in contrast to the common belief. J. Japanese Int. Economies 18 (4) (2004) 551–564.     

ARE TELEVISION AND VIDEO GAMES REALLY HARMFUL FOR KIDS?

Are watching television (TV) and playing video games really harmful for children's development? By using a unique longitudinal dataset with detailed information on children's development and health, we examined the causal effect of hours of TV watched or of video games played on school‐aged children's problem behavior, orientation to school, and obesity. The results suggested that the answer to the question is yes, but the magnitude of the effect is sufficiently small to be considered as negligible. The results were robust to within‐twin‐fixed effects. (JEL I10, I20)     

Globalisation,multinationals and productivity in Japan’s lost decade

This paper studies the process of plant exit and productivity growth in Japan during the ‘lost decade’. A productivity decomposition shows the low rate of productivity growth at the aggregate level to be due to slow within plant productivity growth and a small contribution from the entry and exit components. We find the causes of plant exit to be similar to results in other country contexts except we find no effect from import competition. Our results suggest that the low productivity growth is attributable to high entry barriers and little to the shutting of productive plants by MNEs.     

Oligopoly with a large number of competitors: asymmetric limit result

We address how profitable innovation is in a competitive market by investigating the asymmetric oligopoly model in which 1 firm (innovator) has a cost advantage that is not drastic enough for her to become a monopolist, and by inducing asymmetric limit outcomes when the number of the other firms (laggard firms) goes to infinity. If the innovator is the Stackelberg leader, two cases can arise: (i) the innovator behaves as in the competitive market or (ii) she occupies the entire market but cannot make the price. If we consider Cournot competition, the innovator becomes the partial monopolist. An erratum to this article can be found at     

Closure within multi-plant firms: evidence from Japan

In the literature there is substantial evidence that a plant is more likely to be closed down if it is owned by a firm with other plants or is owned by a multinational enterprise (MNE). But does ownership or multi-plant status matter for which plants are closed? Using Japanese data we study plant closure by multi-plant MNEs and non-MNEs. We show that both organisational forms raise the probability of plant exit and that plants that are relatively small and capital unintensive relative to the rest of the firm are significantly more likely to exit.     

The effects of birth weight: Does fetal origin really matter for long-run outcomes?

This paper investigates whether birth weight itself causes individuals’ future life chances. By using a sample of twins in Japan and controlling for the potential effects of genes and family backgrounds, we examine the effect of birth weight on later educational and economic outcomes. The most important finding is that birth weight has a causal effect on academic achievement around the age of 15, but not on the highest years of schooling and earnings.     

The right place to grow rice for the Japanese market: comparative analysis of greenhouse gas emissions of rice cultivation in Japan and the United States

One consequence of increasing agricultural trade is a shift of geographic location of agricultural activity to more economically productive countries. Whether or not the economic efficiency translates to environmental efficiency for agricultural goods is an open question. To examine environmental implications of shifting agricultural location, we analysed the life-cycle greenhouse gas (GHG) emissions of rice production in Japan and the US for the Japanese market in a comparative manner. This paper presents the life-cycle assessment of brown japonica rice. Our computation of GHG emissions of rice production in Japan and the US were 3.54 and 2.99?kgCO₂-eq kg-rice^?1, respectively. With respect to harvested area, the emissions were 18.4 in Japan and 27.8?tCO₂-eq ha^?1 in the US. For Japan to be environmentally competitive with the US production, fundamental restructuration of field size is necessary to increase yield. In conclusion, economic efficiency does not translate to environmental efficiency with the case of rice production. Importing rice is both economically and environmentally viable option for the Japanese market.     

Determinants of the Timing of Downsizing Among Large Japanese Firms: Long‐Term Employment Practices and Corporate Governance

This paper analyses the relation between corporate governance and employment adjustment behaviour among Japanese firms. The results are summarized in the following two points. First, in the period before 1997, although main banks were likely to allow firms' employment maintenance until they experienced 2 consecutive years of losses, they tended to press firms to downsize once firms faced financial distress. Second, the reduced function of main banks and the increased influence of foreign owners have changed the timing of downsizing since 1997. Changes in corporate governance have brought about slight but non‐negligible changes in Japanese employment practices.     

Returns to Education Using a Sample of Twins: Evidence from Japan*

The objective of this article is to measure the causal effect of education on earnings using a large dataset of twins compiled in Japan with wide‐ranging socioeconomic information. Recent research conducted in China showed that, contrary to the case in Western countries, ability bias is large in estimating the return to education. It is argued that the low rate of return in China is in part due to the competitive and exam‐oriented education system, which is similar to the system in Japan. The empirical results in our study show that the estimated rate of return to education using the sample of identical twins in Japan is 9.3 percent even after omitted ability bias and measurement errors in self‐reported schooling were corrected. Our findings suggest that the conventional OLS estimate is not significantly contaminated by potential biases in Japan.