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We develop a dynamic economic model that includes control variables for both nitrogen fertilizer and irrigation water to analyze interseasonal corn production and nitrate leaching in the presence of irrigation system nonuniformity. The economic model is used to estimate profit-maximizing nutrient management plans under varying levels of system uniformity. The model is also used to appraise several policy options that have been proposed in the nitrate leaching literature as a means of regulating water quality. Investments in technology are considered, as well as limits on nitrate leaching, nitrogen fertilizer, and irrigation water. Copyright 1998, Oxford University Press.

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In this article we develop a vector error correction model using weekly, point-of-purchase scanner data to investigate multivariate pricing relationships among brands competing in the domestic black and herbal tea industries. Johansen's likelihood ratio test established the prices of Bigelow black tea and Celestial Seasonings herbal tea were cointegrated; hence, the pricing decisions of the largest firms in each respective tea market were not unrelated. The black tea prices of Bigelow and Twining, the two largest firms in the black tea market, were cointegrated as well. The cointegrating vectors, speeds of adjustment, and impulse response function analysis provide unique insights into the direction, magnitude, and speed of price response in these value-added, agricultural product markets. [EconLit citations: M100, L200, L660] © 2002 Wiley Periodicals, Inc.

This paper reports a study on consumer expenditure response to GM-free labelling in supermarkets in the Netherlands. It was found that consumers in the Netherlands did not respond negatively to the GM-labelled products.

Using 52 weeks of syndicated point-of-purchase scanner data at the US-level, a hedonic pricing model was estimated and used to quantify the implicit price of convenience in the retail market for breakfast sausage products. The 45-cent per pound premium for cooked breakfast sausage was found to be statistically significant while controlling for other important observable product attributes such as package weight, product shape, fat content, sodium content, organic label, Kosher label, meat type, and brand, as well as market conditions such as merchandising, holidays, and seasonality. Additionally, the Turnbull lowerbound estimate of consumer willingness-to-pay for convenience was estimated to be 11 cents per pound.

This paper develops a simultaneous-equations panel data econometric model to obtain point estimates of market power and pricing conduct in a representative product-differentiated, oligopolistic food market. The importance of this class of markets is recognized given its prevalence in the food and fiber system, especially for final consumer food products. The $1.3 billion domestic spaghetti sauce industry is featured. Although the results indicate firms exert limited market power, a portion of this power is derived from tacit price collusion. A higher degree of price collusion was found among brands within a market segment than between segments.