We simulate the effects of the European Commission's proposals for reforming the CAP, called the « Agenda 2000 » on the agriculture of the Meuse département, in France. This simulation is based on analytical economic accounts of a sample of farms representing professionnal Meuse agriculture, and on mathematical programming models. The originality of the model is to consider a flexibile yields and stocking rate and to integrate the effects of both technological and structural change on farms. According to the simulations, one may expect a decrease in beef production, an increase in grain production and changes in farm income that depend on production systems. The results on the Meuse agriculture make it possible to infer some more general effects of the proposed reform.