Human Resource Management Diffusion and Productivity Imbalances

In this study, we explore spatial variance in management practices and assess its potential contribution to regional imbalances in productivity. The research builds on a growing body of evidence which indicates that differences in management practices can account for a substantial share of cross-country differences in total factor productivity, and which identifies an important role for management practices in explaining differences in productivity between firms in the UK. We contribute to this literature by studying regional variation in HRM and related management practices using workplace-level (i.e. plant-level) data in Britain, taken from the Workplace Employment Relations Survey (WERS). We use these data to map spatial variance in HRM intensity in Britain. We then seek to account for that variance and, in doing so, establish whether regional variance in HRM can help to account for regional variance in productivity. This analysis is complemented by a comparative investigation of equivalent data for France, where levels of productivity and HRM are both higher and less dispersed

Competition, R&D, and the Cost of Innovation.

This paper proposes a model in the spirit of Aghion et al. (2005) that encompasses the magnitude of the impact of competition on R&D according to the cost of the innovation. The effect of competition on R&D is an inverted U-shape. However, the shape is flatter and competition policy is therefore less relevant for innovation when innovations are relatively costly. Intuitively, if innovations are costly for a firm, competitive shocks have to be significant to alter its innovation decisions. Empirical investigations using a unique panel dataset from the Banque de France show that an inverted U-shaped relationship can be clearly evidenced for the largest firms, but the curve becomes flatter when the relative cost of R&D increases. For large costs, the relationship even vanishes. Consequently, in sectors in which innovations are costly, policy changes have to be on a very large scale for an impact to be expected; at the extreme end, in certain sectors, the curve is so at that competition policy is not an appropriate tool for boosting the research effort of firms.Competition ; R&D ; Innovation.

Innovation and Advertising: Theory and Evidence.

Advertising and innovation are two engines for firms to escape competition through a better attraction power toward consumers or quality advantage. We propose a model that encompasses both the static and dynamic interactions between R&D, advertising and competitive environment. This model provides two main predictions. First, for a given competitive environment, quality leaders spend more in advertising in order to extract maximal rents; thus, lower costs of ads may favor R&D. Second, more competition pushes Neck and Neck firms to advertise more to attract a larger share of consumers on their products or services. Empirical evidence from a large panel of 59,000 French firms over 1990-2004 supports these two properties.Advertising, Innovation, Competition, Lerner.

Vente à distance, internet et dynamique des prix.

The share of retail sales made via distance selling has increased steadily, driven by Internet sales. Meanwhile, a large body of research has been devoted to measuring the impact of online shopping on consumer prices. These studies are based primarily on microeconomic data and they reveal contrasting effects due to diverging microeconomic behaviours. This paper aims to use a macro-sector estimation to show how the price-decreasing effects of Internet shopping outweigh the price-increasing effects. In that purpose, we use French price index series and distance selling sales covering about 30 sectors, from 1990 to 2007. We find that downward effects dominate: the recent development of distance selling, due to the development of online selling, results in lower prices.E-Commerce, Price, Competition.

Déterminants du niveau d’innovation dans les PME.

Les mesures en faveur de la concurrence pourraient avoir dans les PME un impact contrasté sur leur niveau d’innovation ; cependant, un accompagnement des PME en phase basse de cycle pourrait favoriser leur effort permanent d’innovation.Innovation, R&D, concurrence, PME, contraintes de crédit, cycle.

Credit Constraints and the Cyclicality of R&D Investment: Evidence from France.

We use a French firm-level panel data set over the period 1993-2004 to analyze the relationship between credit constraints and firms' R&D behavior over the business cycle. Our main results can be summarized as follows: (i) the share of R&D investment over total investment is countercyclical without credit constraints, but it becomes more procyclical as firms face tighter credit constraints; (ii) the result is magnified for firms in sectors that depend more heavily upon external finance; (iii) in more credit constrained firms, R&D investment share plummets during recessions but does not increase proportionally during upturns; (iv) average R&D investment and productivity growth are more negatively correlated with sales volatility in more credit constrained firms.Business cycles ; R&D ; Credit constraints ; Volatility.

Conservation laws for invariant functionals containing compositions

The study of problems of the calculus of variations with compositions is a quite recent subject with origin in dynamical systems governed by chaotic maps. Available results are reduced to a generalized Euler-Lagrange equation that contains a new term involving inverse images of the minimizing trajectories. In this work we prove a generalization of the necessary optimality condition of DuBois-Reymond for variational problems with compositions. With the help of the new obtained condition, a Noether-type theorem is proved. An application of our main result is given to a problem appearing in the chaotic setting when one consider maps that are ergodic.Comment: Accepted for an oral presentation at the 7th IFAC Symposium on Nonlinear Control Systems (NOLCOS 2007), to be held in Pretoria, South Africa, 22-24 August, 200

Quantization of the Hall conductivity well beyond the adiabatic limit in pulsed magnetic fields

We measure the Hall conductivity, $\sigma_{xy}$, on a Corbino geometry sample of a high-mobility AlGaAs/GaAs heterostructure in a pulsed magnetic field. At a bath temperature about 80 mK, we observe well expressed plateaux in $\sigma_{xy}$ at integer filling factors. In the pulsed magnetic field, the Laughlin condition of the phase coherence of the electron wave functions is strongly violated and, hence, is not crucial for $\sigma_{xy}$ quantization.Comment: 4 pages, 4 figures, submitted to PR

Dispute settlement understanding on the use of BOTOX® in chronic migraine

[No abstract available

Industrial relations in European hypermarkets: Home and host country influences

YesIn this article we examine the industrial relations practices of three large European food retailers when they transfer the hypermarket format to other countries. We ask, first, how industrial relations in hypermarkets differ from those in other food retailing outlets. Second, we examine how far the approach characteristic of each company’s country-of-origin (Germany, France and the UK) shapes the practices adopted elsewhere. Third, we ask how they respond to the specific industrial relations systems of each host country (Turkey, Poland, Ireland and Spain)