In the last decades migration has become an increasingly regarded topic in economic research in line with the growth of the world's migrant population which more than doubled in the 1960s and 1990s (ILO 2002). Particularly now - in the light of the forthcoming EU Eastern enlargement with 10 middle and eastern European countries accessing the Union - migration gains importance in research even more. With respect to these future developments several studies have been carried out analyzing various issues, like migration incentives or future migration flows in an enlarged EU. Regarding the forthcoming heavy adjustments of Eastern agriculture to the EU's CAP strong impacts not only on agriculture but also on the labor markets will occur. In order to reflect the economic developments in the candidate as well as in the current EU member countries as realistic as possible the simulations carried out in this paper comprise a very detailed modeling of the agricultural market and furthermore incorporate migration flows. The purpose of the different simulations is to point out the relevance of migration issues in the course of regional integration and its influence on the different production sectors.