Doctrine of relative purchasing power parity under fixed and flexible exchange rates reconsidered

The doctrine of relative purchasing power parity during periods of fixed and flexible exchange rates is investigated. Using cointegration techniques and data for the Group of Seven countries, a subset of the results suggests, that purchasing power parity held only between the United States and the United Kingdom over the period 1957 QI to 1973 QII. Different results are obtained for the 1973 QIII to 1990 QIV period. Based on the maximum likelihood approach of Johansen and Juselius and an error correction model, it is concluded that purchasing power parity held between the United States and Canada, the United States and France, the United States and Italy, and the United States and the United Kingdom.     

Target prices,market prices,and economic efficiency in agriculture in the United States

This paper looks at one aspect of current United States agricultural policy. This concerns the attempt by the federal government to support commodity prices and income of farmers. This is accomplished through the deficiency payments program. Unfortunately, the program is inherently economically inefficient. Moreover, alternatives (short of eliminating the program altogether and not replacing it) also are not economically efficient.

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Zusammenfassung In der amerikanischen Agrarpolitik spielen Preis- und Einkommenssubventionen für Farmer eine wichtige Rolle. Der Beitrag behandelt die Wirkungen des seit 1985 bestehenden Systems von Ausgleichszahlungen für landwirtschaftliche Erzeugnisse. Diese Zahlungen errechnen sich als Differenz zwischen dem Subventionspreis für ein bestimmtes landwirtschaftliches Erzeugnis und seinem Marktpreis.Die bei den Landwirten eintretenden Wirkungen sind meist positiv, hingegen werden die Konsumenten bei Lebensmitteln mit Preiserhöhungen belastet. Seit die Marktpreise in den USA über den Weltmarktpreisen liegen, sind zusätzliche staatliche Subventionen notwendig, um landwirtschaftliche Erzeugnisse auf dem Weltmarkt verkaufen zu können. Auch dafür werden die Konsumenten in ihrer Rolle als Steuerzahler belastet. Die Kosten des Systems betragen für jeden Steuerzahler jährlich etwa 413$.Die Ausgleichszahlungen führen zu Verzerrungen bei wirtschaftlichen Anreizen und dadurch zu einer Fehlallokation von Ressourcen. Deshalb wird diese Politik vom Autor als ineffizient beurteilt. Er diskutiert Alternativen, die darauf abzielen, die gewünschten politischen Ziele zu erreichen. Doch keine dieser Alternativen geht ernsthaft das Problem der wirtschaftlichen Ineffizienz an, das mit Subventionen verbunden ist.

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Noel D. Uri is a Supervisor Agricultural Economist in the Resources and Technology Division, Economic Research Service, U.S. Department of Agriculture, 1301 New York Avenue, N.W., Washington, DC 20005, USA. The views expressed are those of the author and do not necessarily represent the policies of the U.S. Department of Agriculture or the views of other U.S. Department of Agriculture staff members.     

Irrigation production functions with water-capital substitution

The dynamics of biomass growth implies that the yield of irrigated crops depends, in addition to the total amount of water applied, on irrigation scheduling during the growing period. Advanced irrigation technologies relax constraints on irrigation rates and timing, allowing us to better adjust irrigation scheduling to the varying needs of the plants along the growing period. Irrigation production functions, then, should include capital (or expenditures on irrigation equipment) in addition to aggregate water. We derive such functions and study their water-capital substitution properties. Implications for water demand and adoption of irrigation technologies are investigated. A numerical example illustrates these properties.     

THE DEMAND FOR BEVERAGES AND INTERBEVERAGE SUBSTITUTION IN THE UNITED STATES

The analysis in this paper is directed at measuring the substitution between seven beverages consumed in the United States with the objective of shedding some light on just what is the relevant market for antitrust purposes. With regard to the overall beverage market considerations, there is a clear indication that consumers do substitute between different types of beverages. What must be subjectively resolved, however, is whether the extent of the indicated substitution is of significant enough magnitude to infer that two different beverages are in the same product market.     

Price Discrimination by Coupons Restriction

In this paper we show how the use of a restricted number of coupons in the presence of different types of customers is an effective means of implementing a price discriminating policy. Hence, firm profits can be increased even when traditional price discrimination is forbidden.     

Jointly Optimal Taxes and Enforcement Policies in Response to Tax Evasion

Assuming the government cannot fully observe either individual types or incomes and jointly picks optimal taxes and audit policies against evasion can significantly alter standard results from optimal income taxation and tax‐evasion models, which treat these separately. We consider this when individuals differ in their risk preferences and incomes. Given the resulting complexity, supplementing analytic results with numerical analysis helps explain the structure of the resulting policies and how they change when the distribution of income or the revenue requirements of the government change. We do this analysis with and without audit errors and with incomes exogenous or affected by occupational choice.