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Value chains linked to urban markets and agro-industry present new opportunities for adding value and raising rural incomes. Small farmers, who produce small volumes, struggle to enter these markets. A lack of trust among value chain actors increases transaction costs and short-circuits innovation. This paper explores how multi-stakeholder platforms have been used to address these problems in potato-based value chains in Bolivia, Peru and Ecuador. It uses the Institutional Analysis and Development (IAD) framework to understand how platforms work. Differences in characteristics of the value chains, the participating actors and institutional arrangements have led to the emergence of two types of platforms. The first type brings traders, processors, supermarkets and others together with farmer associations and research and development (R&D) organizations to foster the development of new market opportunities through commercial, institutional and technological innovation. The second type is structured around geographically delimited supply areas, meshing farmers and service providers to address market governance issues in assuring volumes, meeting quality and timeliness constraints and empowering farmers. Evidence from these cases indicates that platforms that bring stakeholders together around value chains can result in new products, processes, norms and behaviours that benefit poor farmers, which could not have been achieved otherwise.

SUMMARYInnovation platforms are fast becoming part of the mantra of agricultural research for development projects and programmes. Their basic tenet is that stakeholders depend on one another to achieve agricultural development outcomes, and hence need a space where they can learn, negotiate and coordinate to overcome challenges and capture opportunities through a facilitated innovation process. Although much has been written on how to implement and facilitate innovation platforms efficiently, few studies support ex-ante appraisal of when and for what purpose innovation platforms provide an appropriate mechanism for achieving development outcomes, and what kinds of human and financial resource investments and enabling environments are required. Without these insights, innovation platforms run the risk of being promoted as a panacea for all problems in the agricultural sector. This study makes clear that not all constraints will require innovation platforms and, if there is a simpler and cheaper ‡ Corresponding author.

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The Participatory Market Chain Approach (PMCA) was developed originally to foster pro-poor innovation in potato market chains in the Andean highlands of South America. After promising results in Peru and Bolivia, two questions emerged: (1) Could the PMCA be successfully used to stimulate innovation outside the Andes and in other commodity chains? (2) What would it take to successfully introduce and apply the PMCA in a new setting? The first test application of the approach outside of the Andes was in Uganda. This paper outlines how the PMCA was developed in the Andes and its main features. It then describes the strategies used to introduce the PMCA to Uganda and some of the results to date. The Ugandan experience indicates that the PMCA can, in fact, stimulate technological and institutional innovation in locally relevant agricultural commodity chains in Africa. Since the PMCA requires researchers and development professionals to work in new ways with diverse stakeholders, including not only small farmers but also market agents and policy makers, its successful introduction requires an intensive capacity-development process that fosters the development of social networks, changes in attitudes, and the acquisition of social as well as technical knowledge and skills.