| Budget Amount *help |
¥1,520,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥120,000)
Fiscal Year 2007: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2006: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2005: ¥500,000 (Direct Cost: ¥500,000)
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| Research Abstract |
1. From a theoretical analysis, it is shown that the so-called "1 million yen ceiling," which refers to the tendency of married women in Japan who work part time to limit their earnings to no more than 1.03 million yen, has an impact to delay retirement. The ceiling makes it rational to restrain annual earnings below 1.03 million yen, and doing so reduces lifetime earnings; in order to partially compensate for the reduced lifetime earnings, those who face the ceiling have incentives to work more years. In addition, the measure of welfare cost of the ceiling in a dynamic labor supply model is derived to show that the dynamic welfare cost generally differs from that in a static labor supply model. This research is unique in that it is one of the few studies that examine the dynamic optimization of labor supply under a discontinuous budget set.
2. From an empirical analysis, it is shown that one of the driving forces for the widening part-time/full-time wage gap in Japan is the educational upgrading and aging of the female full-time workforce.
3. In Japan, there are large regional differences in women's participation in the labor market. In estimating a labor supply function using Japanese data, the way to account for regional factors affects the parameter estimates significantly.
4. From an empirical analysis, it is shown that wives' labor earnings have a modest impact to reduce household earnings inequality in Japan.
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