Our work debates the problematic of the definition of internationalization strategies by Multinationals. We give some highlights on the main elements that condition such a process. The main perspective is derived from the analysis of the nature of the process of internationalization. We look for empirical evidence of the elements that influence the process of internationalization. We use data from the internationalization indexes from the UNCTADs world investment reports from 1990 to 2001, to

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... st our models. Foreign markets sales and firms dimension are the factors that statistically explain the behaviour of investment in foreign assets.