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| Zhou, Xia (Vivian); Shaik, Saleem. |
| This paper analyzes the demand for shrimp along with beef, pork, and chicken in the US food market, which contributes much to predicting supply strategies, consumer preferences and policy making. It focuses on the own and cross relationship between the expenditure share and price, income changes. An Almost Ideal Demand System (AIDs) model and two alternative specifications are used to estimate a system of expenditure share equations for shrimp, beef, pork, and chicken. Empirical results indicated that some insignificant slope coefficients and inappropriate signs of them did not comply with microeconomic theory. This could be caused by heteroscedasticity, autocorrelation, a limitation in the data used, or shrimp is a commodity that is quite different. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Expenditure share; Own and cross relationship; Almost Ideal Demand System (AIDs); Heteroscedasticity; And autocorrelation; Demand and Price Analysis. |
| Ano: 2008 |
URL: http://purl.umn.edu/6524 |
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| Mjelde, James W.; Capps, Oral, Jr.; Griffin, Ronald C.. |
| Impacts of alternative specifications for heteroscedastic error structures are examined by estimating various production functions for corn in Central Texas. Production- and profit- maximizing levels of input and the shape of the profit equation obtained from models not corrected for heteroscedasticity differed from those obtained from models corroded for heteroscedasticaity. Using the profit-maximizing input levels for each production function gave essentially the same estimated yield and profit, regardless of the specification for heteroscedasticity employed. Differences of up to one-quarter to one-third are noted, however, in the amount of profit-maximizing levels of input used, depending on the heteroscedasticity correction. |
| Tipo: Journal Article |
Palavras-chave: Corn; Heteroscedasticity; Production function; Research Methods/ Statistical Methods. |
| Ano: 1995 |
URL: http://purl.umn.edu/15329 |
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