In most studies, either profitability, or efficiency or even productivity are used as proxies for competitiveness. For Greece, research on factors affecting Greek firms’ profitability were undertaken (see, e.g., Notta et al., 2010; Voulgaris et al., 2003; Papadogonas et al., 2005; Agiomirgianakis et al., 2006 and the references therein). The present study tries to fill this gap by examines factors affecting agro-firms effectiveness measured as a DEA score as well as with the use of econometric analysis to find out the relation of competitiveness with DEA efficiency and firms exporting activity.