See Pilat, D., F. Lee and B. van Ark (2002), “Production and use of ICT: a sectoral perspective on productivity growth in the OECD area”, OECD Economic Studies No 35. See GomezSalvador, Musso, Stocker and Turunen (2006), “Labour productivity developments in the euro area”, ECB Occasional Paper series No 53. 10  European Commission.
11  It is important to mention a number of caveats related to the measurement of labour productivity in the service sectors. Indeed, data on hourly labour productivity and ICT, especially in the service sectors, are surrounded by considerable uncertainty and caution is therefore required when interpreting the results.