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In recent decades the context for developing and implementing policies for agriculture has changed fundamentally. Conditions in markets important for poor producers have deteriorated, partly as a result of protectionist measures in the developed world. The policy
context guiding public investment in support of agriculture has been revamped. New health shocks and other forms of shock are changing the demographics in rural areas and having major impacts on productive capacity. And the natural resources supporting agriculture are coming
under pressure from processes of environmental change.