This paper explores the impact of diversity of innovative strategies of firms upon the
industrial dynamics through a micro-simulation model. We consider two types of firms
each one being characterised by a specific innovative strategy. Basically we assume that
some cumulative firms adopt an internal learning by searching strategy, while noncumulative
firms adopt an external learning strategy aiming at absorbing external sources
of knowledge. The results show that the co-existence of the two types of firms leads to an
oligopolistic structure characterised by asymmetries in the size of firms and high
technological performances. Thus the diversity of innovative strategies generates a
diversity in firms market shares and is a source of dynamic efficiency in the long run.