Effectiveness of special economic zones of Poland

Special Economic Zones (SEZ) are economic enclaves, created by the state in order to attract domestic and foreign investors, so as to stimulate economic growth in the region. One of the models related to SEZ presenting the way of measuring the effectiveness of their impact on the surrounding economy is P. Warr’s enclave model (1983). The main purpose of the article is to verify the assumptions made in the original Warr model and adapt it to the economic conditions in transforming economy. Poland was chosen for the research because of excessive network of SEZs which influence Polish economy locally and create national and international economic relations. As a result of analysis of the effectiveness of SEZs in Poland, we conclude that the impact of SEZs on Polish economy is positive and additionally they are the source of value added for the market.