Relying upon voluntary contributions for public goods provision generally results in the under-provision of the good relative to first-best levels due to the free-rider problem. Taxation/allocation schemes have been designed which solve the free-rider problem, but are too complex to implement....

While a fast-growing body of research has looked at how the advent anddiffusion of e- commerce has affected prices, much less work hasinvestigated e-commerce's impact on the number and type of firmsoperating in an industry. This paper theoretically and empirically takesup the question of which...