The literature of private provision of public goods suggests thatincentive to contribute is inversely related to group size. This paperempirically tests this relationship using field data from ChineseWikipedia, an online encyclopedia. We exploit an exogenous reduction ingroup size as a result of...

We propose a general model of imperfect competition among multi-productfirms, the consumption of whose goods yields externalities from oneconsumer to another. We extend the allocation approach of Weyl (2010)'smonopoly model, proposing a solution concept, Insulated Equilibrium,that allows for...