The effect of concentration and market power on food prices: evidence from Finland

This research examines empirically the relationship between economies of scale, concentration, and market power in food retailing. With unique, local market data available Finland, the analysis could investigate the impact of both local concentration and industry-wide concentration (which can be interpreted as multimarket contact) are taken into account in the evaluation of grocery retail competitiveness. The results show that the main factor affecting market power is the size of the retail firm. Larger share grocery retailers, for both the local and the national markets, carried higher mark-ups. At the same time, no firm-level scale economies were found from these larger firms. I conclude from these findings that the main purpose of large grocery retail mergers is to gain market power not efficiency.