1,721,050 research outputs found
Afriat’s Theorem for General Budget Sets
No full textAfriat proved the equivalence of a variant of the strong axiom of revealed preference and the existence of
a solution to a set of linear inequalities. From this solution he constructed a utility function rationalizing the
choices of a competitive consumer. We extend Afriat’s theorem to a class of nonlinear, nonconvex budget
sets.We thereby obtain testable implications of rational behavior for a wide class of economic environments,
and a constructive method to derive individual preferences from observed choices. We also show that by
increasing in a regular way the number of observed choices from our class of budget sets one can fully
identify the underlying preference relation
Self-fulfilling mechanisms and rational expectations
No full textWe introduce a class of communication equilibria, which we call self-fulfilling mechanisms, and show that they provide a game-theoretic foundation to rational expectations equilibria. LetEbe an exchange economy with differential information. We associate a strategic market gameΓ(E) withE. We prove that the allocations achieved through a self-fulfilling mechanism inΓ(E) coincide with the rational expectations equilibrium allocations inE. In order to understand how self-fulfilment can be realized in a dynamic framework, we investigate the relationship between self-fulfilling mechanisms inΓ(E) and Nash equilibria of theT-stage repeated gameΓT(E
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Incentives and the core of an exchange economy: a survey
Full text linkThis paper provides a general overview of the literature on the core of an exchange economy with asymetric information. Incentive compatibility is emphasized in studying core concepts at the ex ante and the interim stage.The analysis includes issues of non emptiness of the core as wellas core convergence to price equilibrium allocations
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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