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This article integrates firm birth and death data into a shift-share analysis framework. The proposed methodology can be used when data availability does not allow for the direct association of employment changes to business demographics at the regional level. It may be also used as an exploratory step before any explanatory econometric work is undertaken as a means of identifying classes of potential control variables. Applying the method to Greek data suggests that firm-size heterogeneity should not be ignored, that local conditions matter more than regional economic structure, and that the latter are asymmetrical across sectors when it comes to the effects of business demographics on regional employment or output growth. [ABSTRACT FROM AUTHOR]

One of the debates around new firm formation across sub-national territories focuses on whether regional differences in industrial structure are more important influences than regional differences in individual industry performance. The present research, using Value Added Tax (VAT) registration data, attempts to make a contribution to this debate in the United Kingdom (UK) context using a shift-share covariance model. Firm de-registrations and, as a consequence, net changes in firm stocks are also analyzed with similar questions in mind. The findings show that although the effects of industrial mix are significant across most regions, in several key regional contexts the industrial competitive effect dominates. The issue of the role of regional industrial concentration forms a second major theme of this paper. This basically involves a questioning as to whether concentration is a positive or negative force for new firm formation. The results of this research indicate that industrial concentration, measured through localization, is more important for firm deaths than for firm births (although significant for both), but not particularly relevant to the understanding of the net outcome of entry and exit processes. In the UK, regions with higher levels of industry concentration seem to be associated overall with relatively lower levels of both firm births and deaths. [ABSTRACT FROM AUTHOR]