Evaluating shifts in Japan's quality-of-life

This paper presents a Data Envelopment Analysis/Malmquist index (DEA/MI) analysis of the change in quality-of-life (QOL), which is defined as the state of a social system as measured by multiple social-indicators. Applying panel data from Japan's 47 prefectures for the period 1975–2002, we identify significant movement in the country's overall QOL using a “cumulative” frontier shift index. Results suggest that Japan's QOL rose during the so-called “bubble economy years” (second half of the 1980s), and then dropped in the succeeding “lost-decade” (1990s). We also identify those prefectures considered most “responsible” for the shift(s) in QOL. Moreover, the use of both upper- and lower-bound DEAs enabled an evaluation of both “good” and “bad” movements in QOL.     

Nonlinear income variance profiles and consumption inequality over the life cycle

In contrast to many other countries, consumption inequalities in Japan are not constant over household age but increase from around middle age—a fact first highlighted by Ohtake and Saito [Ohtake, F., Saito, M., 1998. Population aging and consumption inequality in Japan. Rev. Income Wealth 44, 361–381]. Given this information, we examine whether this phenomenon is consistent with the standard precautionary saving model developed by Carroll [Carroll, C.D., 1997. Buffer-stock savings and the life cycle/permanent income hypothesis. Quart. J. Econ. 62, 1–56]. Specifically, we investigate: (1) the degree of age dependence of idiosyncratic income risks; and (2) the importance of age dependence for the evolution of inequalities in consumption predicted by the household model of Carroll (1997). We find a strong age dependence of income risks, which creates a nonlinear age–variance profile of income, and the standard precautionary saving model is consistent with the observed consumption inequalities as long as we take the nonlinearity in age–variance profiles of income into account.     

Difference or Ratio: Implications of Status Preference on Stagnation

We consider a dynamic macroeconomic model where households derive utility from wealth comparisons. Measure of relative affluence can be the ratio to, or the difference from, the social average. These two specifications lead to quite different equilibrium consequences: under the ratio specification full employment is always realised, whereas under the difference specification persistent shortage of aggregate demand can result. Using data of an experiment on status concern, we empirically find that the difference specification of relative affluence fits the data better than the ratio specification. Our work may help in understanding mechanisms behind recent stagnation in developed economies.     

A Downward‐Sloping Labor Supply Curve: The Case of Peru

The author finds evidence of a downward‐sloping labor supply curve for urban areas in Peru from cross‐sectional household data for 2002 and pooled data for available years from 1985 to 2000. Individuals respond to lower hourly earnings with an increase in the quantity supplied of work hours. This behavior would help to explain the increasing trend in average work hours in Peru (this average for male workers in Lima, the capital city, rose from 50.5 to 53.9 weekly hours between 1985 and 2000; meanwhile, 33.4% of workers had weekly schedules above 60 hours in 2002). Another finding is the increase in hours supplied due to pressure from the more numerous cohorts recently entering the Peruvian labor market.     

Optimal Hedging of Basket Barrier Options with Additive Models and Its Application to Equity Value Separation Problem

At the heart of optimal hedging with additive models in Yamada (Recent advances in financial engineering: proceedings of the KIER-TMU international workshop on financial engineering, World Scientific, pp 225–245, 2010; Proceedings of the 2011 American control conference, pp 3856–3861, 2011; Asia-Pac Financ Mark 19(2):149–179, 2012) is to replicate the payoff of European basket options using separate options as close as possible. In this paper, we extend their technique for the case of path-dependent barrier options, where the mean square error of the payoffs between the basket barrier option and the sum of options on the individual assets is minimized over any smooth payoff functions. To this end, we propose to represent the underlying assets using the Brownian bride decomposition and show that computations involving conditional expectations of basket barrier options boil down to those of unconditional expectations. This procedure enables us to provide an algorithm to compute the necessary and sufficient condition for the optimal hedging problem based on the Monte Carlo method. Then, we consider to apply our methodology to the Black–Cox type first passage time structural model, where a defaultable company possesses/runs multiple assets/projects and the default may occur the first time the asset value hits a certain lower threshold before the maturity. We formulate the equity value separation problem using additive models, in which individual equity values are introduced so that their sum approximates the total equity value as close as possible. It is also shown that any portion of total equity value may be assigned as an initial value of each individual equity when using the optimal smooth functions. Finally, we examine the contributions of individual equity values to default or survival by applying a certain normalization for conditional expectations via numerical experiments to illustrate our proposed methodology.     

The effects of Japanese social security retirement benefits on personal saving and elderly labor force behavior

Japanese annual time-series data covering the period 1951 to 1982 reveals that changes in the program of social security retirement benefits have substantial influence on personal saving and retirement behavior. The empirical results show that social security retirement benefits depress personal saving by approximately 13,500 yen per capita in real terms from 1951 to 1982. However, declining labor force participation of the elderly (i.e., earlier retirement) stimulates personal saving by an estimate 500 yen over the same period. The study finds that the benefit effect dominates the retirement effect. The net effect is consequently a downward impact on personal saving. The parameter estimates indicate that the retirement behavior induced by social security retirement benefits tends to become more sensitive and responsive to a rise in the benefits. In addition, this study has identified a negative interdependency between the personal saving and labor retirement behaviors; that is, an individual saves more before retirement if he expects to stay a shorter time in the labor market, and vice versa. Moreover, personal saving influenced by retirement behavior tends to become less and less responsive, though the results indicate a relatively large response, and although very small, the retirement behavior gradually becomes more responsive to changes in personal saving.     

Applying the caption evaluation method to studies of visitors’ evaluation of historical districts

A historical district is a comprehensive form of historical attractions, and has diverse features that visitors can gaze on. This study proposes the application of the caption evaluation method, participatory research involving photographing by subjects, to a study of visitors’ evaluation of a historical district as a tourism destination. Thirty Japanese undergraduates who majored in commerce and 27 Japanese adults with an interest in architecture and/or town planning photographed settings of their choice in a Japanese historical district and stated how they perceived the captured settings in an open-ended form. Their statements were subjected to analysis using a software package as well as manual analysis. The results indicate relationships between various elements in the district and the subjects’ feelings and desires. Particularly, favourable evaluations of old objects and unfavourable perceptions of modern objects were implied. The results also suggest the types of activities visitors may wish to participate in.     

Who bears the burden of social insurance? Evidence from Japanese health and long-term care insurance data

Using the society-managed health insurance data, which is cross-sectional time-series and covers 1670 health insurance societies for seven years (FY1995–2001), we found for the first time in Japan that the majority of the employers' contribution to health insurance is shifting back onto the employees in the form of wage reduction. On the other hand, we cannot find such evidence for the contribution to long-term care insurance using a two-year (FY2000–2001) panel data set. The difference can be theoretically explained by how employees value the contribution relative to social security benefits they enjoy. J. Japanese Int. Economies 18 (4) (2004) 565–581.