This work analyses those industries in which the role of salespersons is to poach clients from rival firms. This is done with a three-stage model where firms decide successively if they enter the market or not, what price to set, and how many salespersons they hire. It is assumed that each consumer is obliged to
This paper provides an empirical analysis of individual earnings using data from the Encuesta Suplementaria de Ingresos. We find that the predictable component of income is hump-shaped over the life-cycle, and that there are strong education effects. The unpredictable component of income can be described by a very persistent permanent shock and a transitory shock.