|
|
|
| Registros recuperados: 85 | |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Alston, Julian M.; Chalfant, James A.. |
| Most studies of the demand for meat in Australia have used some measure of total income or expenditure, but two recent studies have assumed weak separability of a meat group and used expenditure on the meat group instead. These specification differences are of interest to the extent that they affect the economic interpretation, goodness-of-fit, elasticity estimates, predictive performance or hypothesis tests in empirical demand equations. In this paper, non-nested hypothesis testing procedures are used to test the alternative specifications of the income variable and the hypothesis of separability. The results favour the use of the expenditure variable implied by |
| Tipo: Journal Article |
Palavras-chave: Demand and Price Analysis. |
| Ano: 1987 |
URL: http://purl.umn.edu/22578 |
| |
|
|
| Driscoll, Paul J.; McGuirk, Anya M.. |
| Quadratic flexible forms, such as the translog and generalized Leontief, are separability inflexible. That is, separability restrictions render them inflexible with regard to separable structures. A class functional forms is proposed that is flexible with regard to general production structures and remains flexible regarding weakly separable structures when separability restrictions are imposed, thus permitting tests of the separability hypothesis. Additionally, the restricted forms are parsimonious; that is they contain the minimum number of parameters with which flexibility can be achieved. |
| Tipo: Journal Article |
Palavras-chave: Research Methods/ Statistical Methods. |
| Ano: 1992 |
URL: http://purl.umn.edu/30947 |
| |
|
|
| Hansen, Lars Gårn. |
| Most studies of organic food demand are based on questionairs focussing on buying motives. Only a handful of studies estimate organic food demand and these all focus on food submarkets and must assume separability of the organic/non-oragnic nest of analysed food from other food submarkets. The soundness of this separability assumption may nevertheless be questioned since general attributes such as animal welfare and environmental effects are cited as buying motives for organic variants irrespective of food type in most surveys. The assumption of separabilety of nests of organic/non-oragnic variants of foods has, however, not been tested empirically. In this paper we exploit unique Danish... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: "Organics" in general. |
| Ano: 2003 |
URL: http://orgprints.org/1819/1/Danish_oganic_food_demand_Separability_and_substitution_patterns.pdf |
| |
|
| |
|
| |
|
|
| Eales, James S.; Roheim, Cathy A.. |
| The separability of meat products from fish products is investigated to gain a better understanding of Japanese consumer choices in protein demand. Rather than view fish as a single homogeneous commodity, fish and seafood are categorized into several groups of products. Separability is investigated using a demand system approach in which a generalized system of demand equations is specified and used, first to identify if any of the alternative demand structures nested within the general system are appropriate for these data, and then, conditional on those results, to test separability of meats from fish products following Moschini, Moro, and Green. Results... |
| Tipo: Journal Article |
Palavras-chave: Demand and Price Analysis. |
| Ano: 1999 |
URL: http://purl.umn.edu/30873 |
| |
|
| |
|
|
| Brown, Mark G.; Lee, Jonq-Ying. |
| The paper focuses on separability in the almost ideal demand system (AIDS) in time series analysis. The AIDS approximation based on Stone's price index is specified in terms of the Rotterdam model and block additivity is imposed for illustrative purposes. A generalization to other types of separability is then considered. The model can be viewed as an extension to Theil et al.'s Working-PI time series model. In both the Theil et al. model and the AIDS model examined here, the marginal propensity to spend on a good is allowed to depend on the good's budget share. In the model in this paper, the Slutsky coefficients are further allowed to depend on the budget shares. The model provides... |
| Tipo: Report |
Palavras-chave: Almost ideal demand system; Separability; Rotterdam model; Demand and Price Analysis. |
| Ano: 1990 |
URL: http://purl.umn.edu/52711 |
| |
|
|
| Dhar, Tirtha Pratim; Chavas, Jean-Paul; Cotterill, Ronald W.. |
| This paper develops an analysis of markets for differentiated products. It relies on the concept of latent separability for consumer preferences. As proposed by Blundell and Robin, latent separability assumes that purchased products are allocated in the production of latent intermediate utility-yielding goods. Product differentiation can arise when each product makes a different contribution to the production of the latent goods. Latent separability is particularly attractive in the investigation of markets for branded products where the number of brands is large. It allows focusing on the demand for a smaller number of latent goods. Our approach is based... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agribusiness. |
| Ano: 2003 |
URL: http://purl.umn.edu/21892 |
| |
|
|
| Hansen, Lars Gårn. |
| Only a handful of studies have estimated organic food demand. They all focus on specific food submarkets assuming separability from other food consumption. However, consumers typically associate attributes such as e.g. healthiness and environment friendliness with organic variants of most types of food. If such general organic attributes are important for consumer behaviour then separability may not hold. In this paper we utilize a unique Danish micro panel where all food demand is registered on a disaggregated level with an organic/non-organic indicator to estimate a general food demand system with organic variants. We clearly reject the usual |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general. |
| Ano: 2004 |
URL: http://orgprints.org/4755/1/4755.rtf |
| |
|
|
| Bergtold, Jason S.; Peterson, Everett B.. |
| This paper determines the set of parametric restrictions required to maintain flexibility under asymmetric weak separability for the flexible and separable translog (FAST) multistage demand system. Because there is not a unique set of parametric restrictions that ensures separability and the values of the unconditional price and expenditure elasticities depend on the parametric restrictions imposed, the appropriateness of a chosen set of parametric restrictions should be tested empirically. An empirical example that illustrates how the choice of parametric restrictions affects the estimation results and the functional form of the price and expenditure elasticities is provided. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Research Methods/ Statistical Methods. |
| Ano: 2005 |
URL: http://purl.umn.edu/19497 |
| |
|
|
| Moschini, GianCarlo. |
| The notion of indirect separability is exploited to derive a new multistage demand system. The model allows a consistent parameterization of demand relations at various budgeting stages and it fulfills the requirement of flexibility while satisfying separability globally. Two propositions are derived to characterize flexible and separable functional forms, which lead to the specification of a flexible and separable translog (FAST) demand system. The model is particularly attractive for modeling large complete demand systems, and is illustrated with an application to Canadian food demand. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Research Methods/ Statistical Methods; D11; D12; C51. |
| Ano: 2000 |
URL: http://purl.umn.edu/18514 |
| |
|
| |
|
|
| Njonou, Rabelais Yankam; Frahan, Bruno Henry de; Surry, Yves R.. |
| This study has used a corrected likelihood ratio, with AIDS and Rotterdam demand models, to test separability in three separable (A, B, C) wheat import demand structures on the French common wheat market. It appears from the study that the three separable Rotterdam structures are accepted by the test, while only two of them (B and C) are accepted in the case of AIDS at 5% level of significance. Meanwhile, model B seems to be more indicated in demand analysis with AIDS since it is the only one accepted at 15% level of significance. The results obtained demonstrate not only the necessity to test separability in demand structures, but also the necessity to know how the allocation models can... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Separability; Import demand; Rotterdam and AIDS demand models; Wheat qualities; Demand and Price Analysis. |
| Ano: 2002 |
URL: http://purl.umn.edu/24921 |
| |
| Registros recuperados: 85 | |
|
|
|
