Innovation, productivity and export: evidence from Italy

Recent developments in the new international trade theory stressed the relationship between firm heterogeneity and internationalization performance. The key prediction of these models is that firms with different levels of productivity \u2013 the main source of firm heterogeneity \u2013 will generally engage in different modes of internationalization depending on the level of sunk costs incurred in acquiring information on foreign markets, establishing distribution channels, and so on. However, in these theoretical models the sources of productivity are generally unexplained, considering firm heterogeneity as exogenous. A few papers try to open the \u2018black box\u2019 of firm heterogeneity and to show that internationalized firms are generally more innovative, use more knowledge-intensive workers, and are characterized by superior organizational and managerial practices. Using a large sample of over 3000 Italian manufacturing firms for the period 2001-2003, we contribute to this debate employing, and extending the basic Cr\ue9pon, Duguet and Mairesse (CDM) model. We estimate a five-equation model which identifies the links (correlations) between innovation investment, innovation output, firm productivity and export performance