This Paper conducts on a simulation to estimate the administrative investment necessary for maintaining and updating the infrastructure of present-day Japanese Prefectures. The field of the analyzed infrastructure is four fields (the road, water service, drainage, and the trash disposal...

We study the causal relation between private wealth and retirement age. We propose two estimation strategies based on expected retirement age. The outcome variable is observed repeatedly over time. We correct first for the unobserved heterogeneity in the disutility of work by using panel data...