摘要：This paper analyses the complex battle between RED and REDD policies and the resulting global consequences on land use, agricultural production, international trade flows and world food prices. A key methodological challenge is the representation of land use and the possibility to convert forestry land into agricultural land as REDD policies might prevent the use of forestry and wood lands for agriculture. The paper introduces a flexible land supply function allowing large changes in the total potential land availability for agriculture due to environmental considerations such as reducing emissions from deforestation. The parameters of the new land supply function are defined as variables of the model. In the paper, we simplify the implementation of the REDD policies as a shift in potential availability for agricultural land in various regions in the world. Both analysed policies are designed to save emissions but their land use impacts are opposite. The paper shows that global RED policies expand global land use with 3% relative to the baseline. Land abundant countries such as Canada, USA and Indonesia extend their use of agricultural land and their agricultural production. Severe REDD policies that protect all forest and woodlands in especially tropical land abundant regions such as Central and South America, South Africa and Indonesia imply a global reduction of agricultural land by 5% and lead to higher food and land prices. REDD policies reverse production and trade patterns as previous land abundant countries become land scarce countries.
关键词：RED;REDD;flexible land supply function;land;land use changes
