The present study which started in 1999 is framed in the INCOYAM project. Marketing systems of yam are analyzed in three West- African countries: Cote d'Ivoire, Benin and Nigeria. Surveys have been carried out on urban (wholesales and retailers) and rural (collectors) traders. Cities and...

Since 1995, genetically modified organisms (GMOs) have been introduced commercially into US agriculture. These innovations are developed and commercialised by a handful of vertically coordinated “"life science”" firms who have fundamentally altered the structure of the seed industry....

We develop a welfare framework, which explicitly recognizes that research protected by intellectual property rights generates monopoly profits. The result is a simulation model, shaped to the European sugar sector, and enabling to assess the size and distribution of the benefits of transgenic...