Fig. 3.

Relative share of the total contributions taken up by players with different endowments, depending on which group they belong to. (A) In successful groups partaking of the treatments with unequal endowments (Base-Unequal and Pledge-Unequal), the rich compensated the poor by investing more in the active rounds and equalized cumulative contributions over the entire game at approximately €20. (B) In failing groups, such wealth redistribution did not take place to the same extent. The initial gap of €12 between the rich and poor was not fully offset because the former invested, on average, €12.83 each over the entire game (collectively contributing ∼40% of the €93 provided), whereas the poor invested €18.17 (collectively contributing ∼60% of €93).