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2. Financing agricultural research: international investment patterns and policy perspectives;Alston;World Development,1998
3. Science Under Scarcity: Principles and Practice for Agricultural Research Evaluation and Priority Setting;Alston,1996
4. Attribution and other problems in assessing the returns to agricultural R&D;Alston;Agricultural Economics,2001
5. American Evaluation Association, 2004. Guiding Principles for Evaluators (ratified by the AEA membership July 2004). http://www.eval.org/Guiding%20Principles.htm.