The major issues in impact assessment for farmer participatory research (FPR) are analyzed. There are many potential ways in which FPR can have an impact; for example, increasing agricultural productivity, improving the management of natural resources or leading to a wider dissemination of innovations. FPR may also be more effective in reaching specific target groups, and it many reduce research costs and develop community capacity. Impact will be measured by different groups, and for different reasons, according to the circumstances.

As the share of small ruminant meat, especially sheep, in the demand and consumption of meat in general grows, information about consumer expenditure behaviour and demand parameters for live sheep will be valuable for several interest groups in the sheep industry. Using the Heckman two-stage approach, this study shows that sheep prices and household income, as well as socio-demographic factors, including household size and composition, significantly affect the likelihood of buying live sheep and expenditures on live sheep.