Restoration 
Plantations and tree crop commodities 
Enhanced nutrition and food security 
Biodiversity, safeguarding and conservation 
Nationally determined contributions 
Bioenergy and biomaterials 
Blue carbon and peatlands 
Climate change adaptation 
Landscape governance 
Gender 
Silvopastoral systems 
Market-based agroforestry-forestry 
Farm-forest policy interface 
Agroecology 
Livelihood trajectory modelling and assessment 
Inclusive finance and business models 
Innovating finance for sustainable landscapes 
Public and private commitments to zero deforestation 
Orphan tree crops 
Effectiveness of approaches to sustainable supply 
Quality of FTA research for development 
Sentinel landscapes 
Foresight 
Seeds and seedlings delivery systems 
Smallholder tree-crop commodities 
How do different levels of individual payments for environmental services (PES) affect intrinsic and social motivations for forest conservation? Does introducing small PES crowd out these motivations? This paper presents findings from framed field experiments (FFE) conducted with local forest users in Tanzania. The payoff structure represents a common-pool resource situation; participants' payoffs depend on the number of trees harvested, and aggregate over-harvesting can harm future harvest. Four levels of individual PES are tested in a between-group design: no (0%), low (20%), medium (60%) and full (100%) PES, where the level is relative to the harvest value. We observe lower than theoretically predicted harvest rates at no, low and medium PES, while the opposite is true at full PES. The results suggest that low PES has little impact on local forest use in Tanzania and has on aggregate no significant effect on intrinsic and social motivations. Increasing payments has a negative, but diminishing effect on harvest rates.
Authors:
Handberg, Ø.N.; Angelsen, A.
Subjects:
ecosystem services, forest management, climate change
Publication type:
ISI, Journal Article, Publication
Year:
2019
ISSN:
0921-8009
