We propose a simple mechanism that might improve voluntary contributions to public goods. Using a laboratory experiment … we analyze how bundling public with private goods affects individuals' valuations for both goods. In the experiment …

We propose a simple mechanism that might improve voluntary contributions to public goods. Using a laboratory experiment … we analyze how bundling public with private goods affects individuals' valuations for both goods. In the experiment …

. In a laboratory experiment we test the different theories by systematically varying information conditions. We find that …