This workshop is focused on the investigation of empirical patterns of industrial dynamics at different level of aggregation. Thanks to the availability of new large disaggregated databases, a good deal of recent research in the industrial organization literature has been able to single out many stylized facts characterizing the longitudinal and cross-sectional evolution of key characteristics of firms and industries. In particular, the microeconomic portrait that has emerged from the foregoing empirical studies looks quite far from the very homogeneous one usually postulated in conventional models, often based on the representative-individual (RI) hypothesis. Taking this as a point of departure, goals of this meeting are to explore (i) the regularities in the patterns of firm growth and their determinants ; and (ii) their possible relationships with observed time series regularities at the sectoral and macroeconomic levels.