摘要：In public good games, voluntary contributions tend to start o
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 selfselect
into groups committed to charitable giving. Testing this experimentally, we let
subjects choose between two group types, where one type donate a xed amount to a
charity. Contributions in these groups stayed high, whereas contributions in the other
groups showed the well known declining pattern. One implication is that corporate
social responsibility may attract more responsible employees.
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