Income Levels and Income Growth. Some New Cross-Country Evidence and Some Interpretative Puzzles

This work brings together two distinct ensembles of evidence concerning, at macro level, international distributions of incomes and their dynamics, and, at micro level, the size distributions of firms and the properties of their growth rates. Together, we also consider an intermediate level of observation, namely the properties of sectoral growth. First, our empirical analysis provides a fresh look at the international distri-butions of incomes and growth rates by investigating more closely the relationship between the two entities and the statistical properties of the growth process. Second, we try to identify those statistical properties which are invariant with respect to the scale of observation (country, sector or firm) as distinct from those that are instead scale specific. This exercise puts forward a few major interpretative challenges regarding the correlating processes underlying the statistical evidence.International Distribution of Incomes, International Growth Rates, Scaling Laws, Growth Volatility, Exponential Tails

Technological Revolutions and Economic Growth:The �Age of Steam� Reconsidered

revolution, economic growth, steam, technological

Technical Change and Economic Growth: Some Lessons from Secular Patterns and Some Conjectures on the Current Impact of ICT Technology

This paper discusses the link between patterns of technological change and economic development taking an evolutionary perspective. We argue that the modes and timing of such coupled dynamics are deeply influenced by the emergence of new techno-economic paradigms or regimes. ICT-based technologies are the drivers of the current paradigm, which, we show, is still at an early stage of diffusion, particularly for developing countries. Building from historical evidence, we argue that catching up of developing countries critically depends on their ability to master the technology behind the dominant technoeconomic paradigm. We then discuss threats and opportunities related to a possible ICTbased development path.Technical change, Economic Growth, ICT

Short-Pulsed Wavepacket Propagation in Ray-Chaotic Enclosures

Wave propagation in ray-chaotic scenarios, characterized by exponential sensitivity to ray-launching conditions, is a topic of significant interest, with deep phenomenological implications and important applications, ranging from optical components and devices to time-reversal focusing/sensing schemes. Against a background of available results that are largely focused on the time-harmonic regime, we deal here with short-pulsed wavepacket propagation in a ray-chaotic enclosure. For this regime, we propose a rigorous analytical framework based on a short-pulsed random-plane-wave statistical representation, and check its predictions against the results from finite-difference-time-domain numerical simulations.Comment: 11 pages, 11 figures; minor modifications in the tex

Grating-Coupling-Based Excitation of Bloch Surface Waves for Lab-on-Fiber Optrodes

In this paper, we investigate the possibility to excite Bloch surface waves (BSWs) on the tip of single-mode optical fibers. Within this framework, after exploring an idealized, proof-of-principle grating-coupling-based scheme for on-tip excitation of BSWs, we focus on an alternative configuration that is more robust with respect to fabrication-related non-idealities. Subsequently, with a view towards label-free chemical and biological sensing, we present a specific design aimed at enhancing the sensitivity (in terms of wavelength shift) of the arising resonance with respect to changes in the refractive properties of the surrounding environment. Numerical results indicate that the attained sensitivities are in line with those exhibited by state-of-the-art plasmonic bioprobes, with the key advantage of exhibiting much narrower spectral resonances. This prototype study paves the way for a new class of miniaturized high-performance surface-wave fiber-optic devices for high-resolution label-free optical biosensing, and represents an important step forward in the "lab-on-fiber" technology roadmap.Comment: 15 pages; 9 figures; 3 tables (minor revisions in the title and text

Perceived technology clusters and ownership of related technologies: the case of consumer electronics

We contribute to the understanding of how technologies may be perceived to be part of technology clusters. The value added of the paper is both at a theoretical and empirical level. We add to the theoretical understanding of technology clusters by distinguishing between clusters in perceptions and clusters in ownership and by proposing a mechanism to explain the existence of clusters. Our empirical analysis combines qualitative and quantitative methods to investigate clusters of consumer electronics for a sample of Dutch consumers. We find that perceived clusters in consumer electronics are mostly determined by functional linkages and that perceived technology clusters are good predictors of ownership clusters, but only for less widely diffused products.Technology clusters, consumer electronics, innovation

'Chariots of Fire': The Evolution of Tank Technology, 1915-1945

We revisit the notion of technological trajectories by means of a detailed case-study of the evolution of tank technology between 1915 and 1945. We use principal component analysis to analyze the distribution of technological characteristics and how they map into specific service characteristics. We find that, despite the existence of differences in technical leadership, tank designs of different countries show a high degree of overlap and closeness along a common technological trajectory. In the conclusions, we speculate on whether this pattern can be explained by common heuristics that influenced the rate and direction of design activities or by doctrinal viewpoints influencing the development and use of tanks on the battlefield.Technological trajectories, Technological paradigms, Tanks.

Path dependence in technologies and organizations: a concise guide

The note on which an entry for the Palgrave Encyclopedia of Strategic Management will draw offers a beginner’s guide to path dependency in technologies and organizations. We address the very meaning of the concept and its centrality in various aspects of economic analysis. We outline the various levels of the economic system where it is observable, its sources, consequences and different formal representations of path dependent processes.path dependence, lock-in, organizations, technologies