The economics of the service sector has recently attracted a large attention. At a macroeconomic level, the discussion has been focused on the issues concerning the relationship between the expansion of the service industry and the potential for a stable and sustained growth. Slow productivity growth, due to the largely non tradable nature of the output, lack of competition due either to regulations or to barriers to entry are among the "bads" sometimes associated with a "service led" growth. On the other hand new working places are created in the service industries at a rate much higher than...