“…Externality An agent's activity affects the welfare of other agents who do not intend to bear the burden or receive the benefit (Pigou, 1920;Buchanan & Stubblebine, 1962) Positive externalities with forest ecosystem services (Glück, 2000) Negative externalities with pollution (Henderson, 1977) Leakage When a policy action in a jurisdiction leads to the relocation or diffusion of some production and associated economic and environmental outcomes to other jurisdictions (Felder & Rutherford, 1993;Paltsev, 2001) Carbon (Babiker 2005) Forest conservation (Gan & McCarl, 2007) Biodiversity conservation (Ewers & Rodrigues, 2008) Land use (Lambin & Meyfroidt, 2011) Spillover effect Used as a synonym for leakage and externality (Aukland et al, 2003;Buchanan & Stubblebine, 1962) Timber (Wear & Murray, 2004) Land use policy (Hyde, Amacher, & Magrath, 1996) Slippage effect Often used as a synonym for leakage and indirect land use change (Leathers & Harrington, 2000;Wu, 2000) Agricultural land conservation (Flemming, 2014) Forest conservation (Alix-Garcia et al, 2012)…”