In this paper we test the nexus between financial development and economic growth upon territorially highly disaggregated data from Italy, paying particular attention to the role of market power of local banks and cooperative banks. Profit efficiency, computed using the so-called “true fixed-effects” model proposed by Greene (J PROD ANAL 2005), is used as qualitative measure of financial development, while its quantitative measure is credit volume divided by gross domestic product. A growth model, similar to Hasan et al. (J BANK FINANC 2009), is specified and tested on panel data over the 2001-2010 period. Our estimates suggest that both indicators of financial development have a positive significant impact on GDP per worker, especially whe...