What also results from Lee's (1996) findings is that in industrialized countries an average of almost 70 per cent of workers are employed in the service sector, most of which consists of non-tradable activities. As a result, workers are forced to become more skilled and develop sought after trades, or find other means of survival. Ultimately this is a result of changes and trends of employment, an evolving workforce, and globalization that is represented by a more skilled and increasing highly diverse labor force, that are growing in non standard forms of employment (Markey, R. et al. 2006).