EN
Presence of functioning industrial clusters increases the overall attractiveness of regions for foreign direct investments or FDI inflows. The entry of one investor at the same time increases the likelihood of further inflow, which is referred to in the literature as a result of the signaling or agglomeration effect of FDI. The present paper tries to identify the signaling effect of clusters for foreign direct investors linking the data on the overall clusterization pattern and its different aspects gathered during sophisticated cluster mapping study for Poland to data on FDI stock and number of foreign direct investments.