Optimal climate policy is studied in a Ramsey growth model. A developing economy weighs global warming less, hence is more likely to exhaust fossil fuel and exacerbate global warming. The optimal carbon tax is higher for a developed economy. We analyze the optimal time of transition from fossil fuel to renewables, amount of fossil fuel to leave in situ, and carbon tax. Subsidizing a backstop wi...

This paper investigates the importance of network effects in the demand for ethanol-compatible vehicles and the supply of ethanol fuel retailers. An indirect network effect, or positive feedback loop, arises in this context due to spatially-dependent complementarities in the availability of ethanol fuel and the installed base of ethanol-compatible vehicles. Marketers and social planners are int...

This paper considers platform competition in a two-sided market that includes buyers and sellers. One of the platforms benefits from a partial belief advantage, in that each side believes that it is more likely that the other side will join the advantaged platform. We find that the degree of the platform’s belief advantage affects its decision regarding the business model (i.e., whether to subs...