Most of economic literature about industrial location patterns donít consider entrant firm size as an explanatory variable of this phenomenon. Nevertheless, empirical research have shown that bigger firms are heavily influenced by economic variables of the cities where they are going to be located (skilled labour, land rent, etc), while smaller firms react to variables related with personal circumstances of the entrepreneur. We contrast this empirical evidence for Catalan cities between the years 1986 and 1996. A conditional logit model is used for test the probability that a city is being chosen by a firm.