Add to ORKGThe effect of new technology on relative demands for workers has been the subject of much research in economics. Krueger (1993) and others have studied the impact of computers on earnings in the US and elsewhere. Such studies have been criticised for ignoring the possibility of bias due to unobserved heterogeneity between computer users and non-users, resulting in computer users not being a random sub-sample of all workers. As well as looking at the effects of computers on earnings in the UK, this paper extends previous analyses by using a sample selection framework to deal with the bias problem. Results indicate not only that returns to computer use are positive but that it is important to correct for the sample selection bias.