Abstract A large literature has used patent data to measure knowledge spillovers across inventions but few papers have explicitly measured the impact of the collaboration networks formed by inventors on the quality of invention. This paper develops a method to measure the impact of collaboration...

Can indirect network effects lead to adoption externalities? If so, when? We show that in markets where consumption benefits arise from hardware/software systems, adoption externalities will occur when there are (i) increasing returns to scale in the production of software, (ii) free entry in...

To understand the relationship between information flows and white-collar output, we collected unique data on email communications to study the network connecting individuals in a management recruiting firm. We also gathered data on revenues and contracts at the individual level. Our empirical...