The aim of this study is to evaluate the government's intervention policies for greenhouse tomato production. The study is based on data collected from a sample of farmers in the Souss-Massa area. The choice of the Souss-Massa region was made for several reasons, including the potential of tomato crop production, the share of the greenhouse tomato production in relation to domestic production and the existence of the different segments and operators involved in the fresh tomato industry. For this study, we used the Policy Analysis Matrix (PAM) method. Analysis of the data showed that the tomato production in the farms of the Souss-Massa region is profitable; It has a comparative advantage and can generate foreign currency. This is due to the lower social costs of tradable inputs and to the fact that actors use many domestic resources in their production systems. Thus, with a Domestic Cost Resources ratio (DRC) below one, the activity is competitive and will be more competitive in case of a decline in social costs of domestic resources.

Key words: Tomato, Souss-Massa, policy analysis matrix, reference price, comparative advantage