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on Discrete Choice Models |
| By: | ALBERTO MAYDEU (Instituto de Empresa) |
| Abstract: | We provide a gentle overview of modeling choice data, with an emphasis on statistical models that allow treating both observed and unobserved effects due to the decision makers and choice options. We first consider the situation when decision makers express their preferences in the form of liking judgments or purchase intentions (as in conjoint studies).Then, we consider applications that involve partial and/or incomplete ranking data -including paired comparisons and first choices. In this case, we assume that choice outcomes are a result of a maximization process, i.e., decision makers are assumed to select or choose options that have the highest utility among the considered options. |
| Keywords: | Preference data, Random utility models |
| Date: | 2008–10 |
| URL: | http://d.repec.org/n?u=RePEc:emp:wpaper:wp08-30&r=dcm |
| By: | Kumabe, Masahiro; Mihara, H. Reiju |
| Abstract: | Acyclicity of individual preferences is a minimal assumption in social choice theory. We replace that assumption by the direct assumption that preferences have maximal elements on a fixed agenda. We show that the core of a simple game is nonempty for all profiles of such preferences if and only if the number of alternatives in the agenda is less than the Nakamura number of the game. The same is true if we replace the core by the core without majority dissatisfaction, obtained by deleting from the agenda all the alternatives that are non-maximal for all players in a winning coalition. Unlike the core, the core without majority dissatisfaction depends only onthe players' sets of maximal elements and is included in the union of such sets. A result for an extended framework gives another sense in which the core without majority dissatisfaction behaves better than the core. |
| Keywords: | Core; Nakamura number; kappa number; simple games; voting games; maximal elements; acyclic preferences; limit ordinals |
| JEL: | D71 C71 C02 |
| Date: | 2008–11–24 |
| URL: | http://d.repec.org/n?u=RePEc:pra:mprapa:11728&r=dcm |
| By: | Banterle, A.; Stanieri, S. |
| Abstract: | Within the framework of European food safety measures, Reg. 1760/2000 and 1825/2000 have introduced mandatory traceability and relevant labeling into the beef sector. The paper analyses whether information on meat labels can be considered a useful instrument for consumers, facilitating the verification of quality. The purpose of the paper is, first, to evaluate if meat information is used during food purchase. Second, focusing on specific meat information, we assess the interest of consumer for some mandatory and voluntary information cues and identify the determinants affecting the use of them. Data were collected by a survey conducted in the Lombardy, region of the northern Italy, and employed a telephone questionnaire. The sample is composed by 1,025 consumers. We estimate 4 models based on the literature and for all the equations we used a binary logit model. The analyses revealed that meat label is widely used by Italian consumers in the formulation of their purchasing preferences. The use of the meat label is also positively connected to consumer attention towards quality signaling such as certification, expiry date and so on. The origin is confirmed to be an important information for a large part of interviewed. Among the voluntary information the system of cattle breeding is related to a consumer who pays particular attention in general to quality indicators whereas the cattle feeding seems to interest young consumers with high level of education. |
| Keywords: | traceability, meat, consumer preferences, logit, Demand and Price Analysis, |
| Date: | 2008 |
| URL: | http://d.repec.org/n?u=RePEc:ags:eaae08:43547&r=dcm |