What is driving recent growth in OECD countries? Why is it that their levels of GDP per capita are no longer converging? Why is it that some countries, operating at the technological frontier, where advances are difficult, appear to be widening the gap? Whether or not it is appropriate to speak...

Policy makers everywhere want to know about the social and economic impacts of ICT. The aim of this paper is to examine statistical issues associated with their measurement and to suggest areas for future work.