We extend the simple model of voluntary public good provision toallow for two or more public goods, and explore the new possibilitiesthat arise in this setting. We show that, when there are many publicgoods, voluntary contrib...

We show that if patent protection and trade secrecy generate asymmetricmarket structure, an innovator may prefer patent protection than trade secrecy even ifthe diffusion probability is higher under the former but it increases marketconcentration by preventing some imitators...