Trade and agricultural development in the 1980s and the challenges for the 1990s: Latin America

Trends in agricultural trade for South and Central America are documented and the reform process is discussed. Performance of the agricultural sector of the region is evaluated. Challenges for policy makers are reviewed, ranging from macroeconomic policy to science and technology.     

Die neutrale Verbraucherinformation über die Qualität von Dienstleistungen — einige methodische Probleme

Zusammenfassung Auch wenn die vielbeschriebene Entwicklung zum Dienstleistungssektor häufig überschätzt wird, haben Verbraucherorganisationen die neutrale Berichterstattung über die Qualität privater und öffentlicher Leistungen in ihr Serviceangebot einzubeziehen. Die bei einer solchen Informationsstrategie entstehenden methodischen Probleme der Qualitätsmessung immaterieller Produkte sind zahlreich und unterscheiden sich erheblich von denjenigen des Warentests. Sie liegen einerseits in der Natur des Untersuchungsgegenstandes selbst sowie in den Besonderheiten der Marktstrukturen; zum anderen entstehen sie aus den verfügbaren Meßmethoden und Bewertungskriterien. Die Unterschiede zwischen Dienstleistungen und physischen Markenartikeln sowie die noch unbefriedigend entwickelte Methodologie der Dienstleistungstests sind in den Kommunikationsaktivitäten der Verbraucherorganisationen entsprechend zu berücksichtigen.

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Independent consumer information about quality of services — some methodological questions

Though the increasing importance of service industries in modern societies is mostly overrated, consumer organizations should offer independent information about the quality of private and public services. In setting up such information programmes there will arise a lot of methodological issues, different to those of comparative testing of products. Some of the problems stem from the nature of the research object itself and the market structure; other problems are connected with the social science research methods that have to be used and with the choice of criteria of evaluation. The differences between services and physical products as well as the little developed methodology of service testing have to be considered in the choice and design of the testing organization's communication activities.

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Günther Rosenberger ist Leiter der Abteilung Dienstleistungen bei der Stiftung Warentest, Lützowplatz 11–13, D-1000 Berlin 30.     

ESTIMATING SOURCES OF FLUCTUATIONS IN THE AUSTRALIAN WOOL MARKET: AN APPLICATION OF VAR METHODS

Vector autoregression (VAR) methods are used to analyse the contribution of supply, demand and policy shocks to unpredictable fluctuations in the market for Australian wool. VAR procedures are compared with conventional structural econometric models as methods for decomposing sources of instability. While each has advantages and disadvantages, VAR procedures might be viewed as preferable when the underlying market structure is complex and uncertain, as it is in the case of wool. Based on the results obtained, demand shocks are the dominant source of uncertainty in the wool market in the absence of Australian Wool Corporation intervention, but intervention has blunted their effects, reducing market uncertainty and increasing the average level of prices and revenues.     

Surface Coal Mining and Human Health: Evidence from West Virginia

This article presents the first panel-data evidence of a human health externality from the air pollution generated by surface coal mining. In West Virginia, a standard deviation increase in a county's exposure to surface coal mining is associated with 9.85 more asthma hospitalizations per 100,000 residents in a given quarter. Interpreted causally, this suggests over $11 million in hospitalization costs over the 6-year study period. The study builds on earlier cross-sectional research by controlling for unobserved county-level heterogeneity, and by defining more accurate measures of exposure. Both methods are shown to reduce the bias associated with earlier estimates of coal mining's effect on health. Young and elderly women demonstrate the largest sensitivities to surface mining. Falsification tests reveal that neither hernias nor bone fractures demonstrate any relationship with surface mining activity.