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... name for any purpose other than for attribution, and the use of IDB's logo shall be subject to a separate written license agreement between the IDB and the user and is not authorized as part of this CC-IGO license. Abstract We study the economic effect of windfall gains by examining a Peruvian natural experiment. The Camisea Fund for Socioeconomic Development (FOCAM) is an inter-governmental fiscal transfer scheme that allocates natural gas royalties generated by the Camisea Gas Project to eligible subnational governments. We exploit the rules governing FOCAM allocation to identify the effect of the transfers on municipal accounts, local infrastructure, and economic development. Using a newly constructed districtlevel dataset for the years 2005 and 2012, we find evidence of positive impacts on municipal capital expenditures and local infrastructure. However, we also find evidence of a negative impact on municipal current expenditures. More specifically, we find that municipalities with low absorptive capacity coped with the increased administrative burden of FOCAM transfers by reallocating administrative effort toward (away from) executing capital (current) expenditures.