摘要:This paper discusses two factors that push firms enrolled in business networks to achieve different levels of organizational performance and proposes a research framework. Horizontal network is a model based on symmetric power relations among the participants and without a leader firm. Notwithstanding network managers try to offer to all firms the same knowledge and resources opportunities, results usually differ among firms within the same business network. The main assumption of this paper is that firms’ differences in absorptive capacity (AC) and in social capital (SC) explain performance differences among firms participating in the same network. Assuming that social capital is an opportunity for an organization to access valuable resources and has positive effects on its performance, we suggest that the combined effect of absorptive capacity level and social capital among firms belonging to the same network helps to understand performance differences. This paper contributes to improve knowledge both, in analyzing the relationship between absorptive capacity, social capital and performance in network connected firms, and in proposing a new research framework.