Starting from the essential role of clusters in the increase of the research-development competitiveness’ sector, this study suggests the survey of the interdependence relation among the cluster type research units, the employed workforce within the research-development sector and the expenses allotted to the said sector. Within this context, the correlations have been approached at regional level, through a comparative analysis of the clusters’ situation in the eight development regions of Romania, concurrently with the workforce employed within CD sector, but also with the expenses allotted to this sector. © 2019, Politechnica University of Bucharest. All rights reserved.