How did the location of industry across interwar Poland react to the Polish
reunification? After more than 120 years of political and economic separation,
Poland was reunified at the end of 1918. In consequence, the removal of
internal tariff barriers and improved infrastructure strengthened the domestic
market, while foreign market relations were cut off. Similarly, the
geographical distribution of factor endowments was changed, for example
through internal migration. How did these forces interact to determine the
location of industry? We survey the dynamics of industrial location between
1902 and 1925-1937 andestimate a specification that nests market potential and
comparative advantage to quantify their respective impact during the interwar
years. The results point to a role for both, comparative advantage and access
to markets. We show that both statistically and economically the most
important factors were the endowment with skilled labour and interindustry-
linkages