The aim of this article is to test whether there are differences in productivity between exporters and non-exporters among manufacturing firms from Lodz Voivodeship. Not only do we look for a correlation, but also we verify two main hypotheses about the causality of the postulated relation:...

The article presents results of research on relation between productivity of firms from Lodz Voivodeship and their international expansion by exports, imports of intermediate and capital goods and foreign direct investment (FDI). It has been proved, that firms engaged in international activities...