This study finds that marital happiness initially increases with income and then remains more or less constant. It is likely that there exists an optimal number of children.

This study demonstrates that the level of firm-specific technology significantly enlarges the wage gaps of managers. Firm-specific technology is found to be more powerful than industrial risk or the promotion rate in explaining the wage gaps of managers.

Using a unique Taiwan JCEE data set, this study finds that the compensating wage differential for marine engineers is about one third of their received wage, and for nuclear engineers is about one fifth of their received wage.