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  2. Dichotomous preferences - Wikipedia

    en.wikipedia.org/wiki/Dichotomous_preferences

    Exactly dichotomous preferences are uncommon, but can be a useful approximation of voters' behaviors in two-party systems or when voters support candidates if and only if they share a party. Single-winner voting rules that satisfy independence of irrelevant alternatives are strategyproof with dichotomous preferences.

  3. Single-access key - Wikipedia

    en.wikipedia.org/wiki/Single-access_key

    In phylogenetics, a single-access key (also called dichotomous key, sequential key, analytical key, [1] or pathway key) is an identification key where the sequence and structure of identification steps is fixed by the author of the key. At each point in the decision process, multiple alternatives are offered, each leading to a result or a ...

  4. Polychotomous key - Wikipedia

    en.wikipedia.org/wiki/Polychotomous_key

    Polychotomous key refers to the number of alternatives which a decision point may have in a non-temporal hierarchy of independent variables. The number of alternatives are equivalent to the root or nth root of a mathematical or logical variable.

  5. Questionnaire - Wikipedia

    en.wikipedia.org/wiki/Questionnaire

    Four types of response scales for closed-ended questions are distinguished: Dichotomous, where the respondent has two options. The dichotomous question is generally a "yes/no" close-ended question. This question is usually used in case of the need for necessary validation. It is the most natural form of a questionnaire.

  6. Dichotomy - Wikipedia

    en.wikipedia.org/wiki/Dichotomy

    In set theory, a dichotomous relation R is such that either aRb, bRa, but not both. [1] A false dichotomy is an informal fallacy consisting of a supposed dichotomy which fails one or both of the conditions: it is not jointly exhaustive and/or not mutually exclusive. In its most common form, two entities are presented as if they are exhaustive ...

  7. Branching identification key - Wikipedia

    en.wikipedia.org/wiki/Branching_identification_key

    In a diagnostic key, the branching structure of the key should not be mistaken for a phylogenetic or cladistic branching pattern. All single-access keys form a decision tree (or graph if reticulation exists), and thus all such keys have a branching structure. "Branching key" may therefore occasionally be used as a synonym for single-access key.

  8. List of unsolved problems in economics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    "Thirteen critical points in contemporary economic theory". Journal of Economic Literature. 10 (4): 1163– 1189. JSTOR 2721542. Alessandro Innocenti (1995). "Oskar Morgenstern and the Heterodox Potentialities of the Application of Game Theory to Economics". Journal of the History of Economic Thought. 17 (2): 205– 227. doi:10.1017 ...

  9. Identification key - Wikipedia

    en.wikipedia.org/wiki/Identification_key

    In biology, an identification key, taxonomic key, or frequently just key, is a printed or computer-aided device that aids in the identification of biological organisms. Historically, the most common type of identification key is the dichotomous key , a type of single-access key which offers a fixed sequence of identification steps, each with ...