The problems of the the Co-Ordination problem.

This paper is focused on the Hayekian understanding of the operation of the market as the continuous solution of a co-ordination problem in a decentralised decision-making system. The aim is to show the reasons why the solution of this problem is imperfect. These reasons lie, on the one hand, in deficiencies in the mechanisms to which Hayek ascribes the task of solving the co-ordination problem and, on the other hand, in the implications of the Keynesian view on expectations and the workings of the market process. In this regard, the problem of co-ordination in a Hayekian world would have different implications if Keynes’s theory were taken into consideration and the possibility of mistakes in an uncertain world were not underestimated.

Norm-based crisis and Deceitful firms

The aim of this paper is to provide an explanation of recent corporate malpractices in terms of individuals’ norm-based behaviour. In particular, it suggests that corporate misbehaviour could be understood in terms of a system-wide explanation grounded in the way in which the market itself operates and the endogenous norms which regulate its operation.Accounting misbehaviour, Deception, Economic crisis, Invisible-hand explanation, Norm.

Cross-diffusion systems for image processing: II. The nonlinear case

In this paper the use of nonlinear cross-diffu\-sion systems to model image restoration is investigated, theoretically and numerically. In the first case, well-posedness, scale-space properties and long time behaviour are analyzed. From a numerical point of view, a computational study of the performance of the models is carried out, suggesting their diversity and potentialities to treat image filtering problems. The present paper is a continuation of a previous work of the same authors, devoted to linear cross-diffusion models. \keywords{Cross-diffusion \and Complex diffusion \and Image restoration

Pressure effects in PrT2B2C (T = Co, Ni, Pt): Applied and chemical pressure

High-pressure electrical resistivity, r(T), measurements on intermetallic Pr(Co, Ni, Pt)2B2C compounds were performed down to 2K. At room pressure the r(T) in a-b direction curves for the non superconducting Pr(Co, Ni)2B2C compounds exhibit magnetic correlations at about 10 and 4 K, respectively. At low temperatures, PrCo2B2C shows a large spin-dependent electron scattering in comparison to PrNi2B2C. Under applied pressure the magnetic scattering tends to be suppressed more effectively in PrCo2B2C than in PrNi2 B2C. The low temperature behavior of r(T,P) for PrNi2B2C and PrCo2B2C suggests a spin fluctuations mechanism. In the other hand PrPt2B2C compound shows superconductivity at about 6 K and under pressure its superconducting transition temperature tends to be degraded at a rate dTc/dP = -0.34 K/GPa, as expected in compounds with transition metals. The experimental results in Co, Ni and Pt based compounds are analyzed from the point of view of the external and chemical internal pressure effects