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.     

Custom‐hired tractor services and returns to scale in smallholder agriculture: a production function approach

Historically, agricultural transformation has often accompanied the increase in the returns to scale. Little direct evidence exists, however, on what actually causes such increase, despite the knowledge of many factors that are associated with this increase. We fill this knowledge gap by testing whether hiring in tractor services has raised returns to scale in agriculture at the household level in Nepal Terai that has undergone rapid growth in the tractor use through custom‐hiring services. Using Switching Regression and Inverse‐Probability‐Weighted Generalized Method of Moments, we address two sources of endogeneity involved with the estimation of returns to scale; (1) farmers’ self‐selection on whether to hire in tractor services and (2) use of inputs in the production function. For both Cobb‐Douglas and Translog production function specifications, we find that hiring in tractor services significantly increased the returns to scale in agricultural production by about 0.2 ～ 0.3 among farm households not owning tractors, for which suitable control groups are found. Findings are robust under various alternative specifications.     

Afro‐descendants in Peru: Do beauty and race matter in the labor market?

This is a first study about labor discrimination against Afro‐descendants in Peru. We randomly assigned Afro‐Peruvian and white surnames and photographs (subjectively beautiful, homely looking, or not photos) to 3,828 fictitious résumés, sent for unskilled, technical, and professional occupations. We find an unprecedented, sizeable beauty premium in unskilled occupations (232.5 percent), no effect of looks in technical occupations, and a beauty penalty in professional occupations (–71.3 percent). Overall, whites receive 19.37 percent more callbacks than similarly qualified Afro‐Peruvians; this racial discrimination affects only Afro‐Peruvian females, and particularly those employed in technical occupations. These results remain unaltered when we restrict the sample to those markedly “Afro” surnames. Our findings unveil different dynamics of discrimination across job categories, which tend to be overlooked by the existing literature.     

Geography of plant breeding systems,agroclimatic similarity,and agricultural productivity: evidence from Nigeria

Agroclimatic conditions and agricultural research and development (R&D) including plant breeding activities by the public sector are some of the most significant exogenous factors in the agricultural sector. However, the effects of the interactions between these two sets of factors on agricultural productivity have not been studied widely in developing countries, despite potentially important implications on their plant breeding strategies. Using three‐wave panel data of agricultural households in Nigeria and spatial data on various agroclimatic parameters, we show that agricultural productivity and technical efficiency at the agricultural household level is significantly positively affected by the similarity of agroclimatic conditions between locations where agricultural households are located, and locations where major plant breeding institutes are located. These results hold after controlling for various socioeconomic characteristics of these households, including their physical distances to the breeding institutes. Findings are robust across parametric and nonparametric specifications such as Data Envelopment Method, and after addressing potential endogeneity of agroclimatic similarity and agricultural inputs variables in the production function. Productivity effects due to the locations of plant breeding institutes and resulting agroclimatic similarity can be potentially sizable given Nigeria's past productivity growth speed.     

Population Aging,Health Care,and Fiscal Policy Reform: The Challenges for Japan

We construct a transition analysis based on a general equilibrium life‐cycle model to investigate the effects of aging, and we evaluate various policy alternatives designed to lessen the negative influence of aging. In particular, we analyze reforms of insurance benefits and tax financing tools that were recently the focus of a great amount of attention and debate in Japan because of the tense financial situation there. We show that although the potential reforms improve the welfare of future generations, the political implementation of such reforms is difficult because of the large welfare costs for the current population. Our analysis suggests that a gradual reform with an intergenerational redistribution will be more politically implementable than an immediate reform.     

Firms and regional favouritism

Using an unbalanced panel of 539 Vietnamese districts from 2000 to 2010 and the corresponding politicians’ profiles, we examine firm behaviour in response to favouritism by top-ranking politicians towards their districts of birth. Results show that the number of firms tend to increase in the home districts of politicians after they assume office. This favouritism is particularly pronounced for private domestic firms, construction firms and rural areas. However, state-owned firms are indifferent. We discuss the non-response of state-owned firms, potential mechanisms and channels behind the statistical results.     

An exact solution approach for vehicle routing and scheduling problems with soft time windows

A new column generation based exact optimization approach for the vehicle routing and scheduling problem with semi soft time windows (VRPSSTW) is presented. Elementary shortest path problem with resource constraints and late arrival penalties is solved as a subproblem, which rises from the Dantzig–Wolfe decomposition method. Exact solutions of VRPSSTW and hard time windows variant are compared on Solomon’s benchmark instances as well as on an instance based on Tokyo road network. It was found that the VRPSSTW solution results in fewer routes thus overall costs are reduced and late arrival penalties contribute only a small fraction to total cost.     

Japan's inflation under the Bretton Woods system: How large was the Balassa–Samuelson effect?

Japan's real exchange rate appreciation during the post-WWII manufacturing-led growth period has been regarded as a classical example of the Balassa–Samuelson effect. We choose the most conspicuous sub-period—1956–1970—to confirm the effect. Japan was in a rapid growth period under the U.S. dollar peg (real GDP growth, 9.7% per annum). The nominal anchor was weak as Japan's inflation rate (GDP deflator-based, 5.4%) was markedly higher than the U.S. rate (2.6%) during the 15-year period. The decomposition of the annual 2.7% (geometric) Japan–U.S. inflation rate gap (real exchange rate appreciation of the Japanese yen) reveals that the Balassa–Samuelson effect accounted for 0.7%; most of the real exchange rate appreciation (1.7%) was attributed to greater price increases in Japan's tradables. Although Japan's tradable sector achieved high TFP growth, the joint effect of the tradable–nontradable TFP growth difference between the two economies was too small to generate a sizable Balassa–Samuelson effect. Japan's example may suggest that even in rapidly growing economies, the magnitude of the effect in long-run real exchange rate appreciation is generally modest.     

Nonlinear behavior of the socio-economic dynamics for lake eutrophication control

To succeed in combating lake eutrophication, cooperation of local inhabitants, small factories, and farmers in reducing phosphorus discharge is very important. But the willingness of each player to cooperate would depend on the cooperation of other players and on the level of environmental concern of the society in general. Here we study the integrated dynamics of people's choice of behavior and the magnitude of eutrophication. Assumptions are: there are a number of players who choose between alternative options: a cooperative and environment-oriented option is more costly than the other. The decision of each player is affected by “social pressure” as well as by economical cost of the options. The lake pollution increases with the total phosphorus released, and a high pollution level in the lake would enhance the social pressure. The model includes a positive and a negative feedback loops which create diverse dynamical behavior. The model often shows bistability — having an equilibrium with a high level of cooperation among people and clean water, and the other equilibrium with low cooperation and polluted water, which are simultaneously stable. The model also shows fluctuation between a high and a low levels of cooperation in alternating years, cycle with a longer periodicity, or chaotic fluctuation. Conservatism of people stabilizes the system and sometimes helps maintaining cooperation. The system may show unexpected parameter dependence — the improved phosphorus removing efficiency might make water more polluted if it causes the decline in the environmental concern and cooperation among people.