We study a long-recognised but under-appreciated symmetry called "dynamical similarity" and illustrate its relevance to many important conceptual problems in fundamental physics. Dynamical similarities are general transformations of system where the unit Hamilton's principal function is rescaled, therefore represent kind dynamical scaling with formal properties that differ from standard symmetr...

The paper provides a possible explanation for the occurrence of uniform, fixedproportion rules for sharing surplus in two-sided markets. We study a two-sided matching model with transferable utility where agents are characterized by privately known, multi-dimensional attributes that jointly determine the surplus of each potential partnership. We ask the following question: for what divisions of...

We used time series of biomass and catches for the major commercial groundfish stocks in the Eastern Bering Sea/Aleutian Islands region and in he Gulf of Alaska to compute annual surplus production for 1977–2004. Annual surplus production and average annual biomass were aggregated cross stocks within each region to examine the relationship between total surplus production and total aggregated b...

The REGFLUD-project addresses the problem of diffuse pollution that is largely caused by agricultural production. The overall objective is the development and application of multi-criteria scientific methods to set-up a Decision Support System aimed at reducing diffuse pollution in river catchments subject to economic feasibility and social acceptability. The project is structured according to ...

Unskilled labor is the abundant resource in many developing countries, especially at an early stage of their development. Yet, even as at given technologies labor markets have not cleared, neo-classical economists have rejected the notion of an institutional or bargaining wage not based on competitive full employment marginal productivity fundamentals. This paper puts to rest some objections to...

This paper uses data from the German Socio-economic Panel Study to examine the effect of psychological traits, in particular personality, on the formation and dissolution of marital and cohabiting relationships. Personality traits have substantial effects on propensities to marry and divorce. Changing patterns of selection into and out of domestic partnerships indicate that the determinants of ...