We extend the agglomeration economies literature (1) by comparing the effects on productivity of geographic concentrations in IT activity and all other activity and (2) by distinguishing between the effects of IT-producing and IT-using sectors on productivity. Four measures of agglomeration for...

This paper deals with the effects of the geographic concentration of economic activity on productivity through agglomeration economies. We split economic activity into information technology (IT)-related activity and all other activities. The main contribution of this paper is to measure and...