The document summarizes preliminary results from a study analyzing the performance of milk traders, producers, and business development service (BDS) providers in Tanzania and Uganda using a network approach. The study (1) evaluated a BDS program for dairy development, (2) advanced understanding of trader-producer-service linkages and development orientation, and (3) tested new empirical network analysis methods. Preliminary results show variation in network structures between locations and actor types. Future analysis will test hypotheses about how network characteristics and structures influence value chain behavior and development outcomes.