Valuing the Benefits of Coastal Water Quality Improvements Using Contingent and Real Behaviour

Recent moves in the European Union have beenmade towards a toughening of legislation onbathing water quality. This has focussedpolicy-makers thoughts on the welfare benefitsresulting from such improvements, especiallygiven their cost. Our paper uses a combinedstated and revealed preference approach tovalue coastal water quality improvements,focussing on an area of Scotland which hasconsistently failed to meet standards under theBathing Waters Directive. We combine data onreal behaviour with data on contingentbehaviour using a random effects negativebinomial panel model. This allows us to predictboth the change in participation (trips) shouldwater quality be improved, and the welfareincrease per trip. Our model includes allowancefor the existence of substitute sites, and forchanges in recreational behaviour during abeach visit.     

Sad or Happy? The Effects of Emotions on Stated Preferences for Environmental Goods

A substantial literature in behavioural science and psychology shows that emotions affect human choices and values. This paper investigates whether such emotional impacts are also present in stated choice experiments for environmental goods. If this were so, it would introduce an additional element of context dependence to the welfare measures derived from such methods, and would be at odds with the rational choice model underlying welfare economics. A laboratory experiment using three different emotion treatments was combined with a stated preference choice experiment concerned with changes in coastal water quality and fish populations in New Zealand. No statistically significant effects of changes in emotional state on estimated preference parameters, willingness to pay or the randomness of choices were found. The paper concludes by questioning, why such a contrast exists with empirical findings in behavioural science.     

On the Trade-off Between Work-related Training and Labor Mobility: The Role of Firing and Exit Costs

Within an incomplete-contract framework, we examine the consequences of contract renegotiation for contract design/enforcement and training market efficiency. Specifically, we show how the imposition of either firing costs or exit costs can bind together employers and employees in longer-lasting employment relationships that allow both agents to amortize their training investments. Nevertheless, the model implies that, although firing and exit costs provide institutional solutions to the training under-investment problem, this is achieved at the expense of allocative efficiency (efficient separations). Empirical evidence supports the existence of such a trade-off.revised version received July 23, 2003     

Wage discrimination and antidiscrimination policy in unionized industries

We consider industries where the equally skilled workers/members of firm-specific monopoly unions can be grouped according to different reservation wages. We show that, in absence of active antidiscrimination policy, discriminatory wage contracts across groups of employees may emerge, in equilibrium, under either oligopoly or a perfectly competitive product market. We subsequently propose that to combat wage discrimination a benevolent policy maker should under either market structure subsidize the employment of the low reservation wage group. The reason is that taxing wage discrimination, as an alternative antidiscrimination policy, always entails a welfare loss relative to the no policy/wage discrimination status quo.     

社会硅谷:社会创新的发生与发展

社会创新是为满足社会需求而进行的创造性行动和服务。近年来,随着人口老龄化、环境污染、酗酒等社会问题的日益严重,社会创新已迫在眉睫。尽管社会创新时有发生,但较之于商业和科技创新,人们对这方面的研究却较少。本文紧紧围绕社会创新的概念、发展简史、动力和过程等展开讨论,并把组合各种资源和能量以推动社会创新的机构喻为“社会硅谷”。     

WHAT'S TO KNOW ABOUT LABORATORY EXPERIMENTATION IN ECONOMICS?

Abstract Experimental economics has grown as a discipline from near non‐existence 50 years ago to a full‐fledged field within economics in the present. Much of experimental economics research involves experimental methods as a tool, applied to problems in other fields of economics. However, some of this research is inward looking, focusing on questions of the methodology of experimental economics. In this note, I briefly discuss two methodological issues in experimental economics that might benefit from meta‐analysis: the pool from which experimental participants are drawn (university undergraduate students versus other populations) and the scale of monetary incentives faced by participants (large, small or hypothetical).     

Reconstruction and visualisation of melt topology in veined microdioritic enclaves

A number of xenocrystic microdioritic enclaves within the Ross of Mull Granite contain narrow veins of monzonitic material that have formed through the selective partial fusion of granitic magma mechanically incorporated into the microdiorite magma. Field evidence suggests that, as melting of the granitic material ensued, a monzonitic melt formed and exfiltrated from the surrounding microdioritic matrix resulting in Saffman–Taylor instabilities and the development of viscous fingering phenomena. The monzonitic melt network is now preserved as monzonitic veins. Mechanical serial sectioning through a representative veined microdioritic enclave shows that: (a) the topology of the veins is complex but crudely polyhedral, (b) there is porosity (monzonitic melt fraction) variation throughout the length of the veined enclave and (c) that the monzonitic veins are interconnected in three dimensions. Using image analysis software, the total porosity of individual veined enclave sections has been estimated, along with the variation in porosity with depth. Three dimensional rendering and animation software has been used to reconstruct and visualise the monzonitic melt network using Apple QuickTime? software. The above method provides a cheap and powerful way of visualising remnant macroscopic transport properties (such as connectivity and melt topology) in partially molten igneous rocks.     

Never choose the uniquely largest a characterization

Summary In this paper we characterize choice behaviour that picks the second largest element if there is a uniquely largest; otherwise, the largest elements are picked. Having defined our choice function, we offer a complete characterization of the latter in terms of pure choice function conditions. Similarities to and divergences from conventional choice theory are explained. We discuss the motivations underlying our exercise and provide several examples for the axiomatized choice behaviour.Helpful discussions with R. Deb, M. R. Johnson, P. K. Pattanaik, A. Sen, Y. Xu, and participants at a seminar on individual and social choice in Osnabrück, November 1993, are gratefully acknowledged. One of the authors wishes to thank the British Council and the University of Osnabrück for financial support. We are also grateful to the Department of Economics at Queen Mary and Westfield College, London, for its hospitality.     

Assessing collaborative, pre-competitive R&D projects: the case of the UK LINK scheme

The paper addresses the evaluation of outcomes of collaborative, pre-competitive R&D projects. It draws on some empirical analysis carried out on data and information gathered under the UK 'LINK' scheme, a programme supporting R&D collaborative projects and assessing collaboration outcomes. A new indicator of performance, based on the outputs of LINK projects, has been constructed. It provides a relative and quite consistent measure of performance for making comparisons among different LINK projects. However it does not correlate with the more subjective grade applied by LINK's own management. For further improving evaluating mechanisms, more attention should be paid to the benefits that universities and companies as well as governments are drawing from R&D collaborations.