In public good games, voluntary contributions tend to start off high and decline as the game is repeated. If high contributors are matched, however, contributions tend to stay high. We propose a formalization predicting that high contributors will self-select into groups committed to charitable...

Why do people have kids in developed societies? We propose an empirical test of two alternative theories — children as “consumption” vs. “investment” good. We use as a natural experiment the Italian pension reforms of the 90s that introduced a clear discontinuity in the treatment...