Two are Better Than One! Individuals' Contributions to "Unpacked" Public Goods

We study the effects on voluntary contributions of unpacking a single linear public good into distinct but identical parts. In our experiment, subjects either participate to a one linear public good game or a two linear and identical public goods game, with marginal per capita returns of contributions being constant across treatments. We find that unpacking public goods significantly increases contributions of both unexperienced and experienced subjects. Our results highlight new strategies for NGOs for increasing charitable donations.