00415pab a2200145 454500008004000000100002600040245007200066260000900138300001100147362000900158650002600167700001900193700001900212773003800231180718b1983   xxu||||| |||| 00| 0 eng d  aVan De Kragt, Alphons  aThe minimal contribution set as a solution to public goods problems  c1983  a112-22  aMar.  aPublic Goods - U.S.A.  aRobyn M. Dawes  aJohn M. Orbell  aAmerican Political Science Review