⑴ Background-- Since 1978,China has continuously carried out collective forest tenure reform,but there are still some problems,such as low productivity of collective forest land,a large number of barren hills and wastelands suitable for forestation,and low contribution to households income and regional socio-economic development.⑵ Methods-- Based on the unique 8-year balanced panel data involving 9 provinces,18 counties (cities),54 townships,162 administrative villages and 1497 farmer households,and the extended production function model,this...