We empirically characterize the sectoral distribution of firm size for a set of European countries, finding substantial differences in the size distribution within sectors. We then study the relationship between productivity growth at the sectoral level and size structure. We find a positive and robust association between average firm size and growth. We tackle the question of why size should matter for growth, considering the role of innovative activity, to construct a test based on the differential effect of size structure on growth according to different indicators of R&D intensity. Our results indicate that larger average size fosters productivity growth because it makes possible to take advantage of all the increasing returns associated with R&D. We finally argue that our test can be interpreted as a test of reverse causality, which lends support to the view of firm size having a causal impact on growth.

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In this paper we assess whether regional disparities in the euro area stimulate labour mobility, using migration behaviour in US states as a benchmark. Large regional disparities within European countries and size differences between them and US states led us to select regions as the appropriate unit of analysis for Europe. While the level of net immigration flows with respect to population is similar in the USA and the euro area, our study shows that its sensitivity to regional disparities differs considerably. Indeed, migration is much more significantly influenced by income disparities in the USA than it is in the Euro-11, both in the short and the long term. Furthermore, the responsiveness of net migration inflows to shocks to the relative unemployment rate is negative in the regions of the USA, but nil in those of the Euro-11. Finally, risk factors (identified in the theoretical model as the variance of income) are significant determinants of migration decisions in Europe but not in the USA.

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This paper studies the complementarity between investment in information and communication technologies (ICT) and the related investment in human and organizational capital. Using firm-level data taken from a large sample of Italian manufacturing firms, an ICT marginal product much higher than its user cost is estimated. It is then argued that missing complementary investments may have acted as barriers to investment in ICT. Results support the conjecture that the marginal product excess over the user cost is due to those firms that did not complement their ICT investment with an increase in the human capital of their labour force and with a reorganization of the workplace.

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This paper argues that the lack of timely and decisive policy action to correct domestic and external imbalances contributed crucially to the build-up of financial excesses that led to the financial crisis and the Great Recession. We focus on 2002-07 and perform a number of counterfactual simulations to investigate two central elements of the story, namely: (a) an over-expansionary US monetary policy and the absence of effective macro-prudential supervision, which permitted a prolonged expansion of debt-financed consumer spending; (b) the decision of China and other emerging countries to pursue an export-led growth strategy supported by pegging their currencies to the US dollar, resulting in a huge build-up of their official reserves, in conjunction with sluggish domestic demand in surplus advanced economies characterized by low potential output growth. The results of the simulations lend support to the view that if substantial, globally coordinated demand rebalancing had been undertaken in a timely manner, the macroeconomic and financial imbalances would not have accumulated to the extent that they did and the financial turmoil might have had less drastic global consequences.