The present book adds to the broad field of investigations concerning what affects and determines human cooperation. It provides new insights into internal and external factors that influence such decisions. Rather than presenting a closed and universal examination, this book should be seen as...

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...