Kerr, JohnJindal, Rohit2016-04-192016-04-192007USAID PES Brief 63403_PESbrief6_Alternatives.pdfhttp://hdl.handle.net/10919/67509Introduction: Environmental services can be thought of simply as positive externalities: benefits that accrue to people who do not pay for them, supplied by people who are not compensated for doing so. This helps explain why environmental services are often undersupplied and why there is interest in developing mechanisms to secure their delivery.application/pdfen-USIn CopyrightEnvironmental servicesPayments for environmental servicesConservation strategyLaws and regulationsConservation incentivesPESPositive externalitiesDelivery mechanismsMoral suasionRegulatory limitsIncentivesNegative externalitiesTradable permitsInvestment subsidiesGovernanceWorking paper