Computerized information
Computerized information comprises computer software, both purchased and own-account, and computerized databases. Software is already capitalized and thus we use these data, by industry, as described by Chesson and Chamberlin (2006). Purchased software data are based on company investment surveys and own-account based on the wage bill of employees in computer software occupations, adjusted downwards for the fraction of time spent on creating new software (as opposed to, say, routine maintenance) and then upwards for associated overhead costs (a method we use for design below). Software is already in- cluded in the EU KLEMS, but for consistency, we subtract it out of all variables and build our own stock and implied service flow using the ONS data.