Is the Income Elasticity of the Willingness to Pay for Pollution Control Constant?

How willingness to pay for environmental quality changes as incomes rise is a central question in several areas of environmental economics. This paper explores both theoretically and empirically whether or not the willingness to pay (WTP) for pollution control varies with income. Our model indicates that the income elasticity of the marginal WTP for pollution reduction is only constant under very restrictive conditions. Our empirical analysis tests the null hypothesis that the elasticity of the WTP for pollution control with respect to income is constant, employing a multi-country contingent valuation study of eutrophication reduction in the Baltic Sea. Our findings reject this hypothesis, and estimate an income elasticity of the WTP for eutrophication control of 0.1–0.2 for low-income respondents and 0.6–0.7 for high-income respondents. Thus, our empirical results suggest that the elasticity is not constant but is always less than one. This has implications for how benefits transfer exercises, and for theoretical explanations of the environmental Kuznets curve.     

Challenges in the Portuguese textile and clothing industry: a fight for survival

The Portuguese textile and clothing industry thrived after 1960, when Portugal joined the European Free Trade Association, and it has been an important industry in Portugal in terms of value added, employment, and exports. Nevertheless, the industry has experienced significant challenges with the final integration of the apparel and textile industry into GATT on 1 January 2005, as well as the admission of relatively low-wage Bulgaria and Romania into the European Union in 2007. This paper describes recent trends in the industry between 1995 and 2016, including a substantial decrease in output after 2005 and recovery in recent years. In addition, a translog cost function is used to examine the existence of economies of scale, the relationships among inputs, and the effects of the 2005 GATT entry on the industry’s costs. The findings include strong evidence of economies of scale, consistent with the many small and mid-sized enterprises in the Portuguese textile and clothing industry. The results are also consistent with capital and labour being complementary inputs, while other input pairs are substitutes. The entry into GATT may have had a negative impact on cost, though the evidence for that effect is weak.     

Stationary measures for some Markov chain models in ecology and economics

Summary. Let continuous, exists in for x in . Let be an i.i.d. sequence from F and X₀ be a nonnegative random variable independent of . Let be the Markov chain generated by the iteration of random maps by . Such Markov chains arise in population ecology and growth models in economics. This paper studies the existence of nondegenerate stationary measures for {X_n}. A set of necessary conditions and two sets of sufficient conditions are provided. There are some convergence results also. The present paper is a generalization of the work on random logistics maps by Athreya and Dai (2000).Received: 20 March 2002, Revised: 4 December 2002, JEL Classification Numbers: C22, D9.The author wishes to thank Professor Mukul Majumdar and the referees for several useful suggestions.     

The Relationship Between Economic Understanding and the Social Studies Curriculum

Much research is needed to determine the extent to which the high school social studies curriculum, and certain courses within that curriculum, contribute toward economic understanding. Boddy and Tocco report on their attempt to assess the social studies curriculum in Southwest Florida. They also single out one required course, Americanism vs. Communism, which was designed to “emphasize the free-enterprise-competitive economy of the United States,” and measure its impact on a sample of high school seniors. The findings are not encouraging. Although this study applies to one limited geographic area, others may find it interesting because it suggests the need for similar research in other parts of the nation.     

Reserve ratios: A proposal for change

The paper addresses the problem of Fed control of the money supply and the inherent instability of a fractional reserve banking system which Friedman covered in A Program for Monetary Stability. While Friedman proposed a 100 percent reserve requirement as a solution, this work suggests a change from imposing legal reserve ratios on specific liabilities to one of imposing them on total bank liabilities. Reserve ratios are compared to tax rates. Friedman's proposal is to increase the tax rate to 100 percent on specific liabilities and pay interest on reserve balances at the Fed. The proposal of this paper is to keep the tax rates (present reserve ratios) but change the tax base. It is shown that the Fed would gain control over the maximum expansion of banks, but would lose direct control over specific liabilities. The Fed would not tax some liabilities and subsidize others. The Fed could concentrate on setting the tone of the money market and allow the public to use whatever set of bank liabilities it desires as money without specific penalty.     

Qualified medical child support orders--California health insurance coverage assignment orders--national medical support notices: what's a plan administrator to do?

Many employer-sponsored health plans and multi-employer health benefit trusts have seen an increase in medical child support orders (MCSOs), and they can anticipate receiving a greater number in the future. Once regulations are final for the national medical support notice (NMSN) required by the Child Support Performance and Incentive Act of 1998, plans should also begin receiving these. In preparation, plan administrators should ensure that they have proper procedures in place for determining whether MCSOs and NMSNs constitute QMCSOs.     

Mean-Variance Preferences and Investor Behaviour

We study the comparative statics implications of mean-variance preferences for optimal portfolios. Specifically, we show that all risk-averse mean-variance investors raise their investment in a risky asset in response to a change in that asset's return distribution if and only if the change lowers both the mean and standard deviation of the return by the same percentage. Besides being of interest in its own right, our results allow us to compare some comparative statics implications and the expected utility and mean-variance models systematically.