Implementing efficient graphs in connection networks

We consider the problem of sharing the cost of a network that meets the connection demands of a set of agents. The agents simultaneously choose paths in the network connecting their demand nodes. A mechanism splits the total cost of the network formed among the participants. We introduce two new properties of implementation. The first property, Pareto Nash implementation (PNI), requires that the efficient outcome always be implemented in a Nash equilibrium and that the efficient outcome Pareto dominates any other Nash equilibrium. The average cost mechanism and other asymmetric variations are the only mechanisms that meet PNI. These mechanisms are also characterized under strong Nash implementation. The second property, weakly Pareto Nash implementation (WPNI), requires that the least inefficient equilibrium Pareto dominates any other equilibrium. The egalitarian mechanism (EG) and other asymmetric variations are the only mechanisms that meet WPNI and individual rationality. EG minimizes the price of stability across all individually rational mechanisms.     

Coordination versus flexibility in wage formation: a focus on the nominal wage impact of productivity in Germany,Greece, Ireland,Portugal, Spain and the United States

Wage coordination between countries of the European Monetary Union (EMU) aims at aligning nominal wage growth with labour productivity growth at the national level. We analyse the developments in Germany, the EMU’s periphery countries Greece, Ireland, Portugal and Spain along with the United States over the period 1980 to 2010. Apart from the contribution of productivity to nominal wages, we take into account the contributions of prices, unemployment, replacement rates and taxes by means of an econometrically estimated nonlinear equation resulting from a wage bargaining model. We further study the downward rigidities of nominal wages. The findings show that in past times of low productivity, price inflation and reductions in unemployment still put significant upward pressure on nominal wage growth. The periphery countries are far from aligning nominal wage growth with productivity growth. German productivity is a major wage determinant, but surely not the only one. Within the context of a free bargaining process between employers and labour unions, policy-makers can effectively use the replacement rate to steer the nominal wages outcome.     

Price dynamics and collusion under short-run price commitments

We consider a dynamic homogeneous oligopoly in which firms set prices repeatedly. Theory predicts that short-run price commitments increase profits and may lead to less price stability. The experiments that we conducted provide support for the first effect and against the second effect when a random ending rule is applied. When a fixed ending rule is applied, we find no significant impact of short-run price commitments on profits and price stability.     

Business Ethics in Russia

Most of the features of modern Russian business are transient, determined by the transitional character of the Russian economy and drastic changes in the social structure, ideology, and consciousness of Russian society in general. There are three main normative experiences in the traditions of Russian business: a) the experience of pre-Revolutionary business, specifically developed and practiced by the merchants of the old-believers extraction; b) the experience of socialist economy, which was more or less oriented to the public good and presupposed selfless aspirations by the economic agents; c) the experience of legally and administratively constrained private business and illegal shadow business, which expected businessmen to be vigorous, industrious and enterprising. The process of privatization was developed under the aegis of state, specifically the state bureaucracy. The influence of changes in the social-economic system has been ambivalent for social morals. However, the reforms could stimulate their improvement. The recent development in the cultural environment of business testify to the emerging space of civilized business, which manifests that it is practically useful for businessmen to be ethical.     

Shorter Reviews

US Congress, Office of Technology Assessment The technological reshaping of metropolitan America Vieillard-Baron, HervéLes banlieues françaises: ou le ghetto impossible and Stewart, Murray and Marilyn Taylor Empowerment and estate regeneration: a critical review Schneider, Robert A. The ceremonial city: Toulouse observed, 1738-1780 Gardezi, Hassan N. The political economy of international labour migration     

Flexible labour market and trade unions: Surprising career paths of Dutch sub-Saharan Africans

Starting from the empirical evidence that minorities are more likely to work on flexible contracts, we investigated the existence of an ethnic gap in flexible contracts between the native Dutch population and sub-Saharan African immigrants between 2006 and 2012. The migrant group is taken as a test case of ‘outsiders’. This study found, quite surprisingly and contrary to what several theories predict, that the expected ethnic gap in job status between the two groups disappeared in the 6 years between 2006 and 2012. Many sub-Saharan Africans successfully transformed their flexible contracts into permanent ones, catching up with the native Dutch by 2012. The analysis of the statutory provisions showed that the workforce numerical composition in the cleaning industry was important for the inclusiveness of sub-Saharan immigrants. This numerical compositional effect was facilitated by the collective agreements negotiated by trade unions, agreements that were extended to temp workers. Sub-Saharan Africans, overrepresented in the cleaning industry, have benefited disproportionally from the settled agreements. We thus conclude that trade unions can improve the inclusion of migrants not only by explicitly focusing on migrant representation but also by targeting sectors with an overrepresentation of migrants.     

Testing the Wisdom of Crowds in the field: Transfermarkt valuations and international soccer results

This paper investigates the value of collective judgments which stem from settings that have not been designed explicitly to elicit the ‘Wisdom of Crowds’. In particular, I investigate information obtained from transfermarkt.de, an online platform where a crowd of registered users assess the value of professional soccer players. I show that forecasts of international soccer results based on the crowd’s valuations are more accurate than those based on standard predictors, such as the FIFA ranking and the ELO rating. When this improvement in forecasting performance is applied to betting strategies, it leads to sizable monetary gains. I further exploit information on the preferences of individual crowd members in order to investigate whether wishful thinking hampers the accuracy of crowd valuations, but fail to find evidence that such is the case.     

Incorporating Price-Induced Innovation in a Symmetric Generalised McFadden Cost Function with Several Outputs

This paper proposes a multiple-output Symmetric Generalised McFadden (SGM) cost function, incorporating both exogenous and endogenous technological change. Whilst exogenous technological change is captured by the usual time trend, endogenous or price-induced technological change is cast within a partial-adjustment framework involving lagged input prices. The study points to various dimensions or components of technological change, and allows to disentangle pure factor substitution, given the state of the technology, from factor substitution due to price-induced changes in technology. Under the conditions of non-jointness in input quantities, the model further allows to identify technological change biases for each output separately. An empirical application is presented in which the proposed model is applied to time-series data on the feed manufacturing industry in Belgium. To improve on the econometrics, the SGM cost function also incorporates linear splines.