Estimation of a Simultaneous Model of Married Women's Labor Force Participation and Fertility in Urban Japan

A strong and negative correlation between married women's labor force participation and fertility has been witnessed in Japan in past decades. Relative to empirical studies of a traditional single equation on female labor supply, there exist few econometric studies dealing explicitly witha possible interdependency between married women's labor supply and fertility behaviors in urban Japan. Using the recently published 1980 Population Census of Japan, we have estimated a simultaneous-equation model of married women's labor force participation and fertility in urban Japan. Our model shows very satisfactory results to explain the negative correlation between those variables based on a method of 2SLS. Estimated labor supply elasticities for married women with respect to their fertility rates, wife's labor earnings, and male labor earnings are -0.67, 0.23, and -1.76 at the sample means, respectively. On the other hand, estimated elasticities of fertility with respect to married women's labor force participation and family income are -0.31 and 0.23, respectively. We find some of these elasticities for Japanese married women very comparable to those of married women in the United States.

Part-time Employment of Married Women and Fertility in Urban Japan

Previous studies of female labor force participation in Japan often show that the estimates of female wage rates are "negative" in their single-equation models of labor supply. Based on the common belief that the substitution effect dominates the income effect for female labor supply, to disentangle the problem of the inconsistency is, therefore, necessary for the purpose of predicting the behavior of female labor supply and for guiding policy actions. In this paper, we have estimated a logit model of married women's part-time employment and a fertility equation in the context of a simultaneous-equation model. By specifically differentiating part-time employed married women from full-time employed married women,we find that the structural coefficients of the part-time labor supply are significantly different from those of the full-time labor supply in terms of elasticity. However, contrary to the result of married women's full-time employment, we find little interdependency between married women's decisions to work as part-time employees and their fertility in urban Japan.

Workplace Bullying and Ethical Leadership

In order to increase business productivity, benefit packages and other financial incentives might not be adequate. Rather, the focus upon common respect for — and decent treatment of — all workers is discussed, with primary emphasis given to the endemic workplace problem of worker harassment. Simple courtesies, genuine team and individual service acknowledgement, and the dismantling of a counterproductive, hierarchical worker system, often lead to increased productivity, congenial relationships, and a happier and healthier worker

Affleck-Dine baryogenesis just after inflation

We propose a new scenario of Affleck-Dine baryogenesis where a flat direction in the MSSM generates B-L asymmetry just after the end of inflation. The resulting amount of baryon asymmetry is independent of low-energy supersymmetric models but is dependent on inflation models. We consider the hybrid and chaotic inflation models and find that reheating temperature is required to be higher than that in the conventional scenario of Affleck-Dine baryogenesis. In particular, non-thermal gravitino-overproduction problem is naturally avoided in the hybrid inflation model. Our results imply that Affleck-Dine baryogenesis can be realized in a broader range of supersymmetry and inflation models than expected in the literature.Comment: 35 pages, 7 figure

A new upper bound for odd perfect numbers of a special form

We shall given a new effectively computable upper bound of odd perfect numbers whose Euler factors are powers of fixed exponent, improving our old result in T. Yamada, Colloq. Math. 103 (2005), 303--307.Comment: 10 pages, the author's revised version; 3 pages, corrigendum to the previous (published in the journal) versio