concentration, with Silicon Valley as the epitome of a tech cluster. We investigate productivity effects of knowledge worker … productivity increases by 2.8 percent with a ten percent increase in cluster size, the share of the software engineering community … productivity effects are causal. Productivity gains from cluster size growth are strongest for clusters hosting between 0.67 and 13 …

This paper explains in detail the construction of series for productivity in the traded and nontraded sectors for a … panel of 56 countries spanning 1989–2012. The level of productivity in each sector is defined as real value added per worker … more disaggregated industry source data; and (ii) it allows for meaningful comparisons of the level of productivity across …