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This report presents new evidence on industry concentration trends in Europe and in North America. It uses two novel data sources: representative firm-level concentration measures from the OECD MultiProd project, and business-group-level concentration measures using matched Orbis-Worldscope-Zephyr data. Based on the MultiProd data, it finds that between 2001 and 2012 the average industry across 10 European economies saw a 2-3-percentage-point increase in the share of the 10% largest companies in industry sales. Using the Orbis-Worldscope-Zephyr data, it documents a clear increase in industry concentration in Europe as well as in North America between 2000 and 2014 of the order of 4-8 percentage points for the average industry. Over the period, about 3 out of 4 (2-digit) industries in each region saw their concentration increase. The increase is observed for both manufacturing and non-financial services and is not driven by digital-intensive sectors.

This paper presents new evidence on industry concentration at both the country and the world-region levels. It calculates country-level industry concentration measures from the novel data representative of the entire firm population in 12 European countries, and it develops a methodology for calculating industry concentration at the supranational level using detailed cross-country data on subsidiaries of business groups. This paper documents that industry concentration has increased not only in North America but also in Europe since 2000, albeit to a lesser extent.

The literature has established two robust stylized facts: (i) the existence of a firm size-wage premium and (ii) a positive relationship between firm size and productivity. However, the existing evidence is mainly based on manufacturing, which nowadays accounts for a small share of the economy. Using a unique micro-aggregated dataset covering 17 countries over 1994-2012, this paper compares these relationships across sectors. While the size-wage and size-productivity premia are significantly weaker in market services compared to manufacturing, the link between wages and productivity is stronger. In a service economy the stylized fact is a “productivity-wage premium” rather than a “size-wage premium.”

Productivity has recently slowed down in many economies around the world. A crucial challenge in understanding what lies behind this "productivity puzzle" is the still short time span for which data can be analysed. An exception is Italy where productivity growth started to stagnate 25 years ago. Italy therefore offers an interesting case to investigate in search of broader lessons that may hold beyond local specific cities. We find that resource misallocation has played a sizeable role in slowing down Italian productivity growth. If misallocation had remained at its 1995 level, in 2013 Italy's aggregate productivity would have been 18% higher than its actual level. Misallocation has mainly risen within sectors than between them, increasing more in sectors where the world technological frontier has expanded faster. Relative specialization in those sectors explains the patterns of misallocation across geographical areas and firm size classes. The broader message is that an important part of the explanation of the productivity puzzle may lie in the rising difficulty of reallocating resources between firms in sectors where technology is changing faster rather than between sectors with different speeds of technological change.