Enigmatic exchange mechanisms in modern societies: Community and business barter and international countertrade

Modem domestic barter systems are operating in Australia and other high-income countries at the local community level, and at the national level for business exchanges. Both governments and firms practise countertrade at the international level. These exchange regimes appear to have become institutionalised in a macromarketing system which is organised on the primacy of market exchange based on price as the coordinating device. In this paper, explanations for this enigma are presented with a particular emphasis on the Australian context.     

Computing optimal tax equilibria

This paper proposes a technique for computing optimal taxes in a full general equilibrium model. It is based upon a fixed point algorithm of the type that is widely used to solve Walrasian general equilibrium models. Computing an optimal tax equilibrium is more difficult than solving a general equilibrium model only to the extent that the derivatives of the social welfare function and of the consumer demand functions must be calculated in the former case. Solutions to several sample problems are provided to demonstrate the technique. They suggest that optimal tax rates are exceedingly sensitive to the specification of the model used to derive them.     

Ozone pollution and farm profits in England and Wales

Tropospheric ozone is an air pollutant known to adversely affect crop yields across Europe. Experimental work is underway to quantify yield effects at ambient ozone levels for a number of crops. In this article, we undertake direct, farm-level evaluation of the impact of ozone by estimating a multi-output profit function using a panel dataset of cereal farms in England and Wales. A system of equations, comprising the profit function, input and output share equations is estimated using a fixed-effects seemingly unrelated regression technique, with ozone as a quasi-fixed input. Estimated parameters are used to calculate tropospheric ozone-related profit and output supply elasticities. The main findings from the profit function show that a 10% increase in average ozone levels would decrease variable profits by 1.3% and wheat output supply by 1%. These results are of a significantly lower magnitude, but qualitatively consistent with findings from similar studies carried out in North America.     

Verdoorn's law and increasing returns to scale in the UK regions, 1968-91: some new estimates based on the cointegration approach

The Johansen approach to estimating long-run cointegration vectorsis used with 1968–91 UK region by industry data to estimatereturns to scale. Thus, this approach has the advantages ofincluding a measure of capital, it overcomes the simultaneityproblems associated with the single-equation Verdoom law, andit involves estimating a correctly specified dynamic model inwhich is embedded the long-run solution(s). The results indicatethat there is substantial evidence that increasing returns arethe norm for the majority of manufacturing industries in Britishregions.     

Ethics and entrepreneurship

As the study of entrepreneurship and the study of business ethics become increasingly established, the intersection of entrepreneurship and ethics is receiving increasing scholarly attention. In this paper, we review the research connecting ethics and entrepreneurship, classifying the literature into three broad themes; we also identify and integrate the key themes that emerge, and we offer suggestions for future research. We conclude by introducing the articles in this special issue.     

A cost-benefit analysis of landmine clearance in Mozambique

After reviewing the nature and extent of the landmine problem in Mozambique, this article applies cost-benefit analysis to landmine clearance in that country. The main benefits of clearance are saved lives, injuries and medical costs and the agricultural output that is not lost if landmines are cleared. A very large negative net present value was estimated, a result explicable by the high costs of clearance, the relatively small number of people killed or injured by landmines and the low value of agricultural productivity per hectare. The article concludes with a discussion of the role of the economist in analysing such issues and suggests some alternative areas in which financial resources would provide a greater positive impact on the welfare of Mozambicans.     

RISK-ADJUSTED DISCOUNT RATES-EXTENSIONS FROM THE AVERAGE-RISK CASE

This paper provides an approach for developing risk-adjusted discount rates that follows naturally from the standard presentation of the weighted average cost of capital. In addition to examining the implied assumptions about the valuation of corporate debt, the paper shows the pedagogic advantages of the proposed approach.     

A COMPARISON OF SOME INTRODUCTORY AND UNDERGRADUATE ECONOMETRIC TEXTBOOKS

Books reviewed in this article:
William H. Greene (1993) Econometric Analysis (Second Edition)
William E. Griffiths, R. Carter Hill and George G. Judge (1993) Learning and Practicing Econometrics
George G. Judge, R. Carter Hill, William E. Griffiths, Helmut Lütkepohl and Tsoung-Chao Lee (1988) Introduction to the Theory and Practice of Econometrics (Second Edition)
G. S. Maddala (1992) Introduction to the Theory and Practice of Econometrics (Second Edition)