SandBox

IMAGE model drivers and variables	Description	Source
Biofuel policy	Policies to foster the use of biofuels in transport, such as financial incentives and biofuel mandates and obligations.	Drivers
Capital supply	Capital available to replace depreciated stock and expand the stock to support economic growth.	Drivers
GDP per capita	Gross Domestic Product per capita, measured as the market value of all goods and services produced in a region in a year, and is used in the IMAGE framework as a generic indicator of economic activity.	Drivers
Labour supply	Effective supply of labour input to support economic activities, taking into account the participation rate of age cohorts.	Drivers
Population	Number of people per region.	Drivers
Technological change (crops and livestocks)	Increase in productivity in crop production (yield/ha) and livestock production (carcass weight, offtake rate).	Drivers
Trade policy	Assumed changes in market and non-market instruments that influence trade flows, subject to WTO rules and country and region regulation.	Drivers
Land supply	Available land for agriculture, per grid or region, depending on suitability for crops, and excluding unsuitable areas such as steep slopes, wetlands and protected areas.	Land cover and land use
Potential crop and grass yield - grid	Potential crop and grass yield, changing over time due to climate change and possibly soil degradation. In some components, i.e. 'Agricultural economy' regional aggregations of the dataset which depend on the actual land-use area, are used.	Crops and grass

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