where L indicates the logit estimation of the probability of local network formation; its value lies between 0 (no probability for collaboration to emerge) and 1 (networked collaboration surely takes place). In this regression, it is the sign and significant level of beta coefficients (b1, b2, b3, b4, and b5) that are of interest. The summary of key variables used in the study, as well as their measurements, is presented in table 1