“…1 The macroeconomic studies of the linkage between ICT and productivity include Gust and Marquez (2004), Sichel (2000, 2002) and Oulton (2002). There are also a number of industry-level analysis (Stiroh, 2002a, b;O'Mahony and Vecchi, 2003;Oulton and Srinivasan, 2003;Basu et al, 2004;Hu and Quan, 2005) and firm-level studies (Lehr and Lichtenberg, 1999;Stratopoulos and Dehning, 2000;Black and Lynch, 2001;Brynjolfsson and Hitt, 2003;Haltiwanger et al, 2003;Wilson, 2004;Bloom et al, 2005a, b;Hempell, 2005;Matteucci et al, 2005;Atzeni and Carboni, 2006;Dostie and Jayaraman, 2008). For a comprehensive survey of the literature, see Draca et al (2006) and Pilat (2004).…”