Limitations faced by southern Italy's small enterprises due to their dimensions may be overcome by cooperation strategies and network contracts. The international literature has highlighted that effectively governed business networks appear to more successfully allow partner firms to improve their economic performance and survive over time. This paper combines qualitative and quantitative analyses to test the above hypothesis. It also analyses the performance of southern Italian firms that have joined business network contracts equipped with legal personalitythe so called "reti soggetto" or "heavy contractual networks" (HCNs)compared to firms participating in business networks based only on contractual agreements, devoid of legal personality-the so called "reti contratto" or "light contractual networks" (LCNs). Our findings demonstrate that only 13% of all registered business networks are in fact operative. Among the networks with legal personality, approximately 28% are active networks. A similar trend was observed for network contracts devoid legal personality: only 11% are truly active. Performance measures (including profitability, financial situation indicators, and debt sustainability) also differ for firms belonging to HCN, compared to those belonging to LCN, in the years following the subscription of the network contract. Empirical analysis suggests that HCNs have significant positive effects on the performance of participant firms. We thus propose to verify the conditions that strengthen business networks in the south of Italy. We also recommend promoting the establishment of