Credible evidence on complex change processes: key challenges in impact evaluation on agricultural value chains
Although a growing field of policy intervention, the effectiveness of public-private value chain support is regularly questioned in the policy realm. Partly resulting from stronger pressures on aid money to show its worth, convincing evidence is asked for the effect on poverty alleviation. However, impact evaluations of interventions are challenging: outcome indicators are often multi-dimensional, impact is generated in dynamic and open systems and the external validity of conclusions are often limited, due to contextual particularities. Therefore, there is a strong case for theory-based evaluation where logic models indicate how the intervention is expected to influence the incentives for people’s behaviour. The key assumptions inherent in these casual models can be tested through observation and measurement of specific outcome indicators, using mixed methods in triangulation. The mix of methods will have to anticipate the major threats to validity to the type of evaluative conclusion that the evaluation is expected to generate .Following the work of Shadish, Cook and Campbell (2002), validity threats relate to: 1) statistical conclusion validity; 2) internal validity; 3) construct validity; and, 4) external validity. The authors propose the combined use of data-set observations and causal-process observations in a comparative case-study design, based on critical realist concept of contextmechanism-outcome configurations. The use of a realist method to describe and analyze intervention pilots, facilitates the exchange of experiences between development agencies with evidence-based research. Its defined generalisation domain may prevent uncritical embracement of good practices. Certain value chain upgrading strategies may be viable and effective in a range of situations but are not the panacea, the standard solution, for creating market access; they all involve specific institutional arrangements that ‘fire’ specific mechanisms and incentives that depend on the institutional environment and social capital of stakeholders involved.
|Date of creation:||01 Jun 2011|
|Date of revision:|
|Contact details of provider:|| Postal: Ludwigstraße 33, D-80539 Munich, Germany|
Web page: https://mpra.ub.uni-muenchen.de
More information through EDIRC
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Tony Lawson, 2009. "Applied economics, contrast explanation and asymmetric information," Cambridge Journal of Economics, Oxford University Press, vol. 33(3), pages 405-419, May.
- Ravallion Martin, 2009. "Should the Randomistas Rule?," The Economists' Voice, De Gruyter, vol. 6(2), pages 1-5, February.
- Ragin, Charles C., 2000. "Fuzzy-Set Social Science," University of Chicago Press Economics Books, University of Chicago Press, edition 1, number 9780226702773, February.
- Norman Blaikie, 1991. "A critique of the use of triangulation in social research," Quality & Quantity- International Journal of Methodology, Springer, vol. 25(2), pages 115-136, May.
- Ton, Giel, 2008. "Challenges for smallholder market access: a review of literature on institutional arrangements in collective marketing," MPRA Paper 33329, University Library of Munich, Germany.
- repec:ucp:bkecon:9780226702766 is not listed on IDEAS
- Chiu, Yung-ho & Huang, Chin-wei & Ma, Chun-Mei, 2011. "Assessment of China transit and economic efficiencies in a modified value-chains DEA model," European Journal of Operational Research, Elsevier, vol. 209(2), pages 95-103, March.
- Patricia Rogers, 2009. "Matching impact evaluation design to the nature of the intervention and the purpose of the evaluation," Journal of Development Effectiveness, Taylor & Francis Journals, vol. 1(3), pages 217-226.
- Duflo, Esther & Glennerster, Rachel & Kremer, Michael, 2007.
"Using Randomization in Development Economics Research: A Toolkit,"
CEPR Discussion Papers
6059, C.E.P.R. Discussion Papers.
- Duflo, Esther & Glennerster, Rachel & Kremer, Michael, 2008. "Using Randomization in Development Economics Research: A Toolkit," Handbook of Development Economics, Elsevier.
- Esther Duflo & Rachel Glennerster & Michael Kremer, 2006. "Using Randomization in Development Economics Research: A Toolkit," NBER Technical Working Papers 0333, National Bureau of Economic Research, Inc.
- Maredia, Mywish K., 2009. "Improving the proof: Evolution of and emerging trends in impact assessment methods and approaches in agricultural development," IFPRI discussion papers 929, International Food Policy Research Institute (IFPRI).
- Borgen, Svein Ole, 2004. "Rethinking incentive problems in cooperative organizations," Journal of Behavioral and Experimental Economics (formerly The Journal of Socio-Economics), Elsevier, vol. 33(4), pages 383-393, September.
- Chris Cornforth, 2004. "The Governance of cooperatives and mutual associations: a paradox perspective," Annals of Public and Cooperative Economics, Wiley Blackwell, vol. 75(1), pages 11-32, 03.
- Cook, Michael L., 1994. "The Role of Management Behavior in Agricultural Cooperatives," Journal of Agricultural Cooperation, National Council of Farmer Cooperatives, vol. 9.
When requesting a correction, please mention this item's handle: RePEc:pra:mprapa:32027. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Joachim Winter)
If references are entirely missing, you can add them using this form.