This paper investigates the impact of new firms' quality on the magnitude of their employment effects. Our results clearly show that the quality of start-ups, measured by their affiliation to sectors and innovative industries, strongly influences the direct and the overall employment...

Urban economists hypothesize that industrial diversity matters for urban growth and development, but metrics for empirically testing this relationship are limited to simple concentration metrics (e.g. location quotient) or summary diversity indices (e.g. Gini, Herfindahl). As shown by recent...

This article analyzes long-term value creation or destruction in mergers and acquisitions in the telecommunications sector. After characterizing the market targeted by the analysis (telecommunications) and discussing and selecting the most suitable long-term methodology, we will make an...

Using quarterly data of 58 countries, this paper provides empirical evidence that mobile phone diffusion from 2007 to 2009 is positively influenced by international network effects. Direct and indirect network effects are a result of the international standadization of telecommunication...