%0 Journal Article %T Effects of regional market integration – a theoretical approach %A Pasierbiak, Paweł %J International Business and Global Economy %V 2018 %R 10.4467/23539496IB.18.039.9412 %N Volume 37 %P 533-543 %K theory of economic integration, free trade area, customs union, common market %@ 2300-6102 %D 2018 %U https://ejournals.eu/en/journal/ibage/article/effects-of-regional-market-integration-a-theoretical-approach %X The aim of this study is to review selected effects of regional market integration in theoretical terms. In contemporary conditions, when the processes of regional integration are increasingly challenged, this study will be a kind of return to the roots of regional economic integration. It covers a free trade area, a customs union, and a common market, for which selected effects of economic integration are presented. The literature indicates various, but not always positive, effects of market integration. As a set of factors motivates decisions concerning engagement in integration processes, it is worth pointing out objective economic effects as the basis for rational political decisions. In order to achieve the aim of the study, a critical review of literature published since the mid-20th century and a descriptive method have been used.