Results for 'Judgment aggregation'

934 found
Order:
See also
  1. Judgment aggregation and the problem of tracking the truth.Stephan Hartmann & Jan Sprenger - 2012 - Synthese 187 (1):209-221.
    The aggregation of consistent individual judgments on logically interconnected propositions into a collective judgment on those propositions has recently drawn much attention. Seemingly reasonable aggregation procedures, such as propositionwise majority voting, cannot ensure an equally consistent collective conclusion. The literature on judgment aggregation refers to that problem as the discursive dilemma. In this paper, we motivate that many groups do not only want to reach a factually right conclusion, but also want to correctly evaluate the (...)
    Direct download (12 more)  
     
    Export citation  
     
    Bookmark   16 citations  
  2.  55
    Judgement Aggregation and Distributed Thinking.Kai Spiekermann - 2010 - AI and Society 25 (4):401-412.
    In recent years, judgement aggregation has emerged as an important area of social choice theory. Judgement aggregation is concerned with aggregating sets of individual judgements over logically connected propositions into a set of collective judgements. It has been shown that even seemingly weak conditions on the aggregation function make it impossible to find functions that produce rational collective judgements from all possible rational individual judgements. This implies that the step from individual judgements to collective judgements requires trade-offs (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  3. Judgment aggregation with consistency alone.Franz Dietrich & Christian List - 2007 - Maastricht University.
    All existing impossibility theorems on judgment aggregation require individual and collective judgment sets to be consistent and complete, arguably a demanding rationality requirement. They do not carry over to aggregation functions mapping profiles of consistent individual judgment sets to consistent collective ones. We prove that, whenever the agenda of propositions under consideration exhibits mild interconnections, any such aggregation function that is "neutral" between the acceptance and rejection of each proposition is dictatorial. We relate this (...)
    Direct download (10 more)  
     
    Export citation  
     
    Bookmark   14 citations  
  4. Judgment aggregation: (Im)possibility theorems.Franz Dietrich - 2006 - Journal of Economic Theory 1 (126):286-298.
    The aggregation of individual judgments over interrelated propositions is a newly arising field of social choice theory. I introduce several independence conditions on judgment aggregation rules, each of which protects against a specific type of manipulation by agenda setters or voters. I derive impossibility theorems whereby these independence conditions are incompatible with certain minimal requirements. Unlike earlier impossibility results, the main result here holds for any (non-trivial) agenda. However, independence conditions arguably undermine the logical structure of (...) aggregation. I therefore suggest restricting independence to premises, which leads to a generalised premise-based procedure. This procedure is proven to be possible if the premises are logically independent. (shrink)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   75 citations  
  5.  55
    Methods for distance-based judgment aggregation.M. K. Miller & D. Osherson - unknown
    Judgment aggregation theory, which concerns the translation of individual judgments on logical propositions into consistent group judgments, has shown that group consistency generally cannot be guaranteed if each proposition is treated independently from the others. Developing the right method of abandoning independence is thus a high-priority goal. However, little work has been done in this area outside of a few simple approaches. To fill the gap, we compare four methods based on distance metrics between judgment sets. The (...)
    Direct download  
     
    Export citation  
     
    Bookmark   23 citations  
  6. Propositionwise judgment aggregation: the general case.Franz Dietrich & Christian List - 2013 - Social Choice and Welfare 40 (4):1067-1095.
    In the theory of judgment aggregation, it is known for which agendas of propositions it is possible to aggregate individual judgments into collective ones in accordance with the Arrow-inspired requirements of universal domain, collective rationality, unanimity preservation, non-dictatorship and propositionwise independence. But it is only partially known (e.g., only in the monotonic case) for which agendas it is possible to respect additional requirements, notably non-oligarchy, anonymity, no individual veto power, or implication preservation. We fully characterize the agendas for (...)
    Direct download (10 more)  
     
    Export citation  
     
    Bookmark   12 citations  
  7. Arrow's theorem in judgment aggregation.Franz Dietrich & Christian List - 2007 - Social Choice and Welfare 29 (1):19-33.
    In response to recent work on the aggregation of individual judgments on logically connected propositions into collective judgments, it is often asked whether judgment aggregation is a special case of Arrowian preference aggregation. We argue for the converse claim. After proving two impossibility theorems on judgment aggregation (using "systematicity" and "independence" conditions, respectively), we construct an embedding of preference aggregation into judgment aggregation and prove Arrow’s theorem (stated for strict preferences) as (...)
    Direct download (11 more)  
     
    Export citation  
     
    Bookmark   85 citations  
  8. (2 other versions)Judgment aggregation: A survey.Christian List & Clemens Puppe - 2009 - In Paul Anand, Prasanta Pattanaik & Clemens Puppe (eds.), Handbook of Rational and Social Choice. Oxford University Press.
    Our aim in this survey article is to provide an accessible overview of some key results and questions in the theory of judgment aggregation. We omit proofs and technical details, focusing instead on concepts and underlying ideas.
    Direct download (5 more)  
     
    Export citation  
     
    Bookmark   55 citations  
  9.  42
    Judgment Aggregation and Subjective Decision-Making.Michael K. Miller - 2008 - Economics and Philosophy 24 (2):205-231.
    I present an original model in judgment aggregation theory that demonstrates the general impossibility of consistently describing decision-making purely at the group level. Only a type of unanimity rule can guarantee a group decision is consistent with supporting reasons, and even this possibility is limited to a small class of reasoning methods. The key innovation is that this result holds when individuals can reason in different ways, an allowance not previously considered in the literature. This generalizes judgment (...)
    Direct download (8 more)  
     
    Export citation  
     
    Bookmark   4 citations  
  10. (1 other version)Judgement aggregation under constraints.Franz Dietrich & Christian List - 2008 - In Thomas Boylan & Ruvin Gekker (eds.), Economics, Rational Choice and Normative Philosophy. New York: Routledge. pp. 111-123.
    In solving judgment aggregation problems, groups often face constraints. Many decision problems can be modelled in terms the acceptance or rejection of certain propositions in a language, and constraints as propositions that the decisions should be consistent with. For example, court judgments in breach-of-contract cases should be consistent with the constraint that action and obligation are necessary and sufficient for liability; judgments on how to rank several options in an order of preference with the constraint of transitivity; and (...)
    Direct download (5 more)  
     
    Export citation  
     
    Bookmark   5 citations  
  11. Judgment aggregation without full rationality.Franz Dietrich & Christian List - 2008 - Social Choice and Welfare 31:15-39.
    Several recent results on the aggregation of judgments over logically connected propositions show that, under certain conditions, dictatorships are the only propositionwise aggregation functions generating fully rational (i.e., complete and consistent) collective judgments. A frequently mentioned route to avoid dictatorships is to allow incomplete collective judgments. We show that this route does not lead very far: we obtain oligarchies rather than dictatorships if instead of full rationality we merely require that collective judgments be deductively closed, arguably a minimal (...)
    Direct download (6 more)  
     
    Export citation  
     
    Bookmark   36 citations  
  12.  74
    Optimal judgment aggregation.Jesus P. Zamora Bonilla - unknown
    A necessary condition for a group being taken as a rational agent is that its choices and judgements are ‘logically contestable’, but this can lead to problems of aggregation, as Arrow impossibility theorem or the discursive dilemma. This paper proposes a contractarian or constitutional approach: the relevant thing is what aggregation mechanisms would be preferred by the members of the group. Two distinctions need to be made: first, judgement aggregation is not aggregation of decisions, and judgement (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  13. Judgement aggregation in non-classical logics.Daniele Porello - 2017 - Journal of Applied Non-Classical Logics 27 (1-2):106-139.
    This work contributes to the theory of judgement aggregation by discussing a number of significant non-classical logics. After adapting the standard framework of judgement aggregation to cope with non-classical logics, we discuss in particular results for the case of Intuitionistic Logic, the Lambek calculus, Linear Logic and Relevant Logics. The motivation for studying judgement aggregation in non-classical logics is that they offer a number of modelling choices to represent agents’ reasoning in aggregation problems. By studying judgement (...)
    Direct download (8 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  14.  9
    Judgment Aggregation.Philippe Mongin - 2012 - In Sven Ove Hansson & Vincent F. Hendricks (eds.), Introduction to Formal Philosophy. Cham: Springer. pp. 705-720.
    Judgment aggregation theory generalizes social choice theory by having the aggregation rule bear on judgments of all kinds instead of barely judgments of preference. The theory derives from Kornhauser and Sager’s doctrinal paradox and Pettit’s discursive dilemma, which List and Pettit turned into an impossibility theorem – the first of a long list to come. After mentioning this formative stage, the paper restates what is now regarded as the “canonical theorem” of judgment aggregation theory. The (...)
    Direct download  
     
    Export citation  
     
    Bookmark   2 citations  
  15. A generalised model of judgment aggregation.Franz Dietrich - 2007 - Social Choice and Welfare 4 (28):529-565.
    The new field of judgment aggregation aims to merge many individual sets of judgments on logically interconnected propositions into a single collective set of judgments on these propositions. Judgment aggregation has commonly been studied using classical propositional logic, with a limited expressive power and a problematic representation of conditional statements ("if P then Q") as material conditionals. In this methodological paper, I present a simple unified model of judgment aggregation in general logics. I show (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   70 citations  
  16.  24
    Judgment aggregation and minimal change: a model of consensus formation by belief revision.Marcel Heidemann - 2018 - Theory and Decision 85 (1):61-97.
    When a group of agents attempts to reach an agreement on certain issues, it is usually desirable that the resulting consensus be as close as possible to the original judgments of the individuals. However, when these judgments are logically connected to further beliefs, the notion of closeness should also take into account to what extent the individuals would have to revise their entire belief set to reach an agreement. In this work, we present a model for generation of agreement with (...)
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  17. Judgment Aggregation.Fabrizio Cariani - 2011 - Philosophy Compass 6 (1):22-32.
    Judgment aggregation studies how collective opinions arise from the aggregation of individual ones. This article surveys a variety of aggregation rules (possible ways of aggregating individual judgments into collective ones). Aggregation by majority opinion is known to satisfy some but not all the desiderata for an aggregation rule. More general impossibility results show that not all the natural desiderata can be satisfied by a single aggregation rule. To interpret these results, we focus here (...)
    Direct download  
     
    Export citation  
     
    Bookmark   2 citations  
  18.  20
    Logical Constraints on Judgement Aggregation.Marc Pauly & Martin Hees - 2006 - Journal of Philosophical Logic 35 (6):569-585.
    Logical puzzles like the doctrinal paradox raise the problem of how to aggregate individual judgements into a collective judgement, or alternatively, how to merge collectively inconsistent knowledge bases. In this paper, we view judgement aggregation as a function on propositional logic valuations, and we investigate how logic constrains judgement aggregation. In particular, we show that there is no non-dictatorial decision method for aggregating sets of judgements in a logically consistent way if the decision method is local, i.e., only (...)
    Direct download  
     
    Export citation  
     
    Bookmark   35 citations  
  19. Logical Constraints on Judgement Aggregation.Marc Pauly & Martin van Hees - 2006 - Journal of Philosophical Logic 35 (6):569 - 585.
    Logical puzzles like the doctrinal paradox raise the problem of how to aggregate individual judgements into a collective judgement, or alternatively, how to merge collectively inconsistent knowledge bases. In this paper, we view judgement aggregation as a function on propositional logic valuations, and we investigate how logic constrains judgement aggregation. In particular, we show that there is no non-dictatorial decision method for aggregating sets of judgements in a logically consistent way if the decision method is local, i.e., only (...)
    Direct download (8 more)  
     
    Export citation  
     
    Bookmark   89 citations  
  20.  47
    Judgment aggregation in nonmonotonic logic.Xuefeng Wen - 2018 - Synthese 195 (8):3651-3683.
    Judgment aggregation studies how to aggregate individual judgments on logically correlated propositions into collective judgments. Different logics can be used in judgment aggregation, for which Dietrich and Mongin have proposed a generalized model based on general logics. Despite its generality, however, all nonmonotonic logics are excluded from this model. This paper argues for using nonmonotonic logic in judgment aggregation. Then it generalizes Dietrich and Mongin’s model to incorporate a large class of nonmonotonic logics. This (...)
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  21. Judgment aggregation by quota rules: Majority voting generalized.Franz Dietrich & Christian List - 2007 - Journal of Theoretical Politics 19 (4):391-424.
    The widely discussed "discursive dilemma" shows that majority voting in a group of individuals on logically connected propositions may produce irrational collective judgments. We generalize majority voting by considering quota rules, which accept each proposition if and only if the number of individuals accepting it exceeds a given threshold, where different thresholds may be used for different propositions. After characterizing quota rules, we prove necessary and sufficient conditions on the required thresholds for various collective rationality requirements. We also consider sequential (...)
    Direct download (5 more)  
     
    Export citation  
     
    Bookmark   36 citations  
  22. Judgment aggregation: A short introduction.Christian List - 2012 - In Uskali Mäki (ed.), Handbook of the Philosophy of Economics.
    The aim of this article is to introduce the theory of judgment aggregation, a growing interdisciplinary research area. The theory addresses the following question: How can a group of individuals make consistent collective judgments on a given set of propositions on the basis of the group members' individual judgments on them? I begin by explaining the observation that initially sparked the interest in judgment aggregation, the so-called "doctinal" and "discursive paradoxes". I then introduce the basic formal (...)
    Direct download (6 more)  
     
    Export citation  
     
    Bookmark   3 citations  
  23. Strategy-proof judgment aggregation.Franz Dietrich & Christian List - 2005 - Economics and Philosophy 23 (3):269-300.
    Which rules for aggregating judgments on logically connected propositions are manipulable and which not? In this paper, we introduce a preference-free concept of non-manipulability and contrast it with a preference-theoretic concept of strategy-proofness. We characterize all non-manipulable and all strategy-proof judgment aggregation rules and prove an impossibility theorem similar to the Gibbard--Satterthwaite theorem. We also discuss weaker forms of non-manipulability and strategy-proofness. Comparing two frequently discussed aggregation rules, we show that “conclusion-based voting” is less vulnerable to manipulation (...)
    Direct download (20 more)  
     
    Export citation  
     
    Bookmark   52 citations  
  24.  73
    Optimal Judgment Aggregation.Jesús Zamora Bonilla - 2007 - Philosophy of Science 74 (5):813-824.
    The constitution of a collective judgment is analyzed from a contractarian point of view. The optimal collective judgment is defined as the one that maximizes the sum of the utility each member gets from the collective adoption of that judgment. It is argued that judgment aggregation is a different process from the aggregation of information and public deliberation. This entails that the adoption of a collective judgment should not make any rational member of (...)
    Direct download (10 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  25. The possibility of judgment aggregation on agendas with subjunctive implications.Franz Dietrich - 2010 - Journal of Economic Theory 145 (2):603-638.
    The new …eld of judgment aggregation aims to …nd collective judgments on logically interconnected propositions. Recent impossibility results establish limitations on the possibility to vote independently on the propositions. I show that, fortunately, the impossibility results do not apply to a wide class of realistic agendas once propositions like “if a then b” are adequately modelled, namely as subjunctive implications rather than material implications. For these agendas, consistent and complete collective judgments can be reached through appropriate quota rules (...)
    Direct download (7 more)  
     
    Export citation  
     
    Bookmark   19 citations  
  26.  67
    Meta-analysis as Judgment Aggregation.Berna Kilinc - 2011 - In Henk W. De Regt, Stephan Hartmann & Samir Okasha (eds.), EPSA Philosophy of Science: Amsterdam 2009. Springer. pp. 123--135.
    My goal in this paper is to see the extent to which judgment aggregation methods subsume meta-analytic ones. To this end, I derive a generalized version of the classical Condorcet Jury Theorem, the aggregative implications of which have been widely exploited in the area of rational choice theory, but not yet in philosophy of science. I contend that the generalized CJT that I prove below is useful for modelling at least some meta-analytic procedures.
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark  
  27. The impossibility of unbiased judgment aggregation.Franz Dietrich & Christian List - 2010 - Theory and Decision 68 (3):281-299.
    Standard impossibility theorems on judgment aggregation over logically connected propositions either use a controversial systematicity condition or apply only to agendas of propositions with rich logical connections. Are there any serious impossibilities without these restrictions? We prove an impossibility theorem without requiring systematicity that applies to most standard agendas: Every judgment aggregation function (with rational inputs and outputs) satisfying a condition called unbiasedness is dictatorial (or effectively dictatorial if we remove one of the agenda conditions). Our (...)
    Direct download (15 more)  
     
    Export citation  
     
    Bookmark   11 citations  
  28. Dynamically rational judgment aggregation.Franz Dietrich & Christian List - forthcoming - Social Choice and Welfare.
    Judgment-aggregation theory has always focused on the attainment of rational collective judgments. But so far, rationality has been understood in static terms: as coherence of judgments at a given time, defined as consistency, completeness, and/or deductive closure. This paper asks whether collective judgments can be dynamically rational, so that they change rationally in response to new information. Formally, a judgment aggregation rule is dynamically rational with respect to a given revision operator if, whenever all individuals revise (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark  
  29. Judgment aggregation, discursive dilemma and reflective equilibrium: Neural language models as self-improving doxastic agents.Gregor Betz & Kyle Richardson - 2022 - Frontiers in Artificial Intelligence 5.
    Neural language models (NLMs) are susceptible to producing inconsistent output. This paper proposes a new diagnosis as well as a novel remedy for NLMs' incoherence. We train NLMs on synthetic text corpora that are created by simulating text production in a society. For diagnostic purposes, we explicitly model the individual belief systems of artificial agents (authors) who produce corpus texts. NLMs, trained on those texts, can be shown to aggregate the judgments of individual authors during pre-training according to sentence-wise vote (...)
     
    Export citation  
     
    Bookmark  
  30.  31
    Many-valued judgment aggregation: characterizing the possibility/impossibility boundary.Conal Duddy & Ashley Piggins - unknown
    A model of judgment aggregation is presented in which judgments on propositions are not binary but come in degrees. The primitives are a set of propositions, an entailment relation, and a “triangular norm” which establishes a lower bound on the degree to which a proposition is true whenever it is entailed by a set of propositions. Under standard assumptions, we identify a necessary and sufficient condition for the collective judgments to be both deductively closed and free from veto (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   7 citations  
  31.  6
    (1 other version)Judgment aggregation: a survey.Paul Anand, Prasanta Pattanaik & Clemens Puppe - 2009 - In Paul Anand, Prasanta Pattanaik & Clemens Puppe (eds.), Handbook of Rational and Social Choice. Oxford University Press.
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  32. Complexity of Judgment Aggregation.Ulle Endriss, Umberto Grandi & Daniele Porello - 2012 - Journal of Artificial Intelligence Research 45:481--514.
    We analyse the computational complexity of three problems in judgment aggregation: (1) computing a collective judgment from a profile of individual judgments (the winner determination problem); (2) deciding whether a given agent can influence the outcome of a judgment aggregation procedure in her favour by reporting insincere judgments (the strategic manipulation problem); and (3) deciding whether a given judgment aggregation scenario is guaranteed to result in a logically consistent outcome, independently from what the (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   6 citations  
  33. A Role for Judgment Aggregation in Coauthoring Scientific Papers.Liam Kofi Bright, Haixin Dang & Remco Heesen - 2017 - Erkenntnis 83 (2):231-252.
    This paper addresses the problem of judgment aggregation in science. How should scientists decide which propositions to assert in a collaborative document? We distinguish the question of what to write in a collaborative document from the question of collective belief. We argue that recent objections to the application of the formal literature on judgment aggregation to the problem of judgment aggregation in science apply to the latter, not the former question. The formal literature has (...)
    Direct download (12 more)  
     
    Export citation  
     
    Bookmark   18 citations  
  34. Decision framing in judgment aggregation.Fabrizio Cariani, Marc Pauly & Josh Snyder - 2008 - Synthese 163 (1):1 - 24.
    Judgment aggregation problems are language dependent in that they may be framed in different yet equivalent ways. We formalize this dependence via the notion of translation invariance, adopted from the philosophy of science, and we argue for the normative desirability of translation invariance. We characterize the class of translation invariant aggregation functions in the canonical judgment aggregation model, which requires collective judgments to be complete. Since there are reasonable translation invariant aggregation functions, our result (...)
    Direct download (6 more)  
     
    Export citation  
     
    Bookmark   9 citations  
  35. Reliable Methods of Judgment Aggregation.Stephan Hartmann, Gabriella Pigozzi & Jan Sprenger - 2007 - Journal for Logic and Computation 20:603--617.
    The aggregation of consistent individual judgments on logically interconnected propositions into a collective judgment on the same propositions has recently drawn much attention. Seemingly reasonable aggregation procedures, such as propositionwise majority voting, cannot ensure an equally consistent collective conclusion. The literature on judgment aggregation refers to such a problem as the \textit{discursive dilemma}. In this paper we assume that the decision which the group is trying to reach is factually right or wrong. Hence, we address (...)
    Direct download (6 more)  
     
    Export citation  
     
    Bookmark   11 citations  
  36.  87
    (1 other version)The problem of constrained judgment aggregation.Franz Dietrich & Christian List - 2010 - In Thomas Uebel, Stephan Hartmann, Wenceslao Gonzalez, Marcel Weber, Dennis Dieks & Friedrich Stadler (eds.), The Present Situation in the Philosophy of Science. Springer. pp. 125-139.
    Group decisions must often obey exogenous constraints. While in a preference aggregation problem constraints are modelled by restricting the set of feasible alternatives, this paper discusses the modelling of constraints when aggregating individual yes/no judgments on interconnected propositions. For example, court judgments in breach-of-contract cases should respect the constraint that action and obligation are necessary and sufficient for liability, and judgments on budget items should respect budgetary constraints. In this paper, we make constraints in judgment aggregation explicit (...)
    Direct download (8 more)  
     
    Export citation  
     
    Bookmark  
  37. A liberal paradox for judgment aggregation.Franz Dietrich & Christian List - 2008 - Social Choice and Welfare 31 (1):59-78.
    In the emerging literature on judgment aggregation over logically connected proposi- tions, expert rights or liberal rights have not been investigated yet. A group making collective judgments may assign individual members or subgroups with expert know- ledge on, or particularly affected by, certain propositions the right to determine the collective judgment on those propositions. We identify a problem that generalizes Sen's 'liberal paradox'. Under plausible conditions, the assignment of rights to two or more individuals or subgroups is (...)
    Direct download (6 more)  
     
    Export citation  
     
    Bookmark   21 citations  
  38.  40
    Resolving Paradoxes In Judgment Aggregation.Davide Rizza - 2012 - Philosophical Quarterly 62 (247):337-354.
    When a law court makes a decision based on the individual deliberation of each judge, a case of judgment aggregation occurs. The possibility that the aggregation's outcome be logically inconsistent, even though it is based on consistent individual judgments, arises relatively easily and has been the subject of several investigations. In this paper I show that this paradoxical behaviour is the effect of decision procedures that are unable to discriminate between logically consistent and logically inconsistent individual judgments. (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  39. The theory of judgment aggregation: an introductory review.Christian List - 2010 - The Centre for Philosophy of Natural and Social Science (CPNSS), London School of Economics.
    This paper provides an introductory review of the theory of judgment aggregation. It introduces the paradoxes of majority voting that originally motivated the field, explains several key results on the impossibility of propositionwise judgment aggregation, presents a pedagogical proof of one of those results, discusses escape routes from the impossibility and relates judgment aggregation to some other salient aggregation problems, such as preference aggregation, abstract aggregation and probability aggregation. The present (...)
    No categories
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  40.  33
    Judgement aggregation in scientific collaborations: The case for waiving expertise.Alexandru Marcoci & James Nguyen - 2020 - Studies in History and Philosophy of Science Part A 84:66-74.
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  41. Introduction to judgment aggregation.Christian List & Ben Polak - 2010 - Journal of Economic Theory 145 (2):441-466.
    This introduces the symposium on judgment aggregation. The theory of judgment aggregation asks how several individuals' judgments on some logically connected propositions can be aggregated into consistent collective judgments. The aim of this introduction is to show how ideas from the familiar theory of preference aggregation can be extended to this more general case. We first translate a proof of Arrow's impossibility theorem into the new setting, so as to motivate some of the central concepts (...)
    Direct download (6 more)  
     
    Export citation  
     
    Bookmark   17 citations  
  42. Propositionwise judgment aggregation.Franz Dietrich & Christian List - 2009 - The Centre for Philosophy of Natural and Social Science (CPNSS), London School of Economics.
    In the theory of judgment aggregation, it is known for which agendas of propositions it is possible to aggregate individual judgments into collective ones in accordance with the Arrow-inspired requirements of universal domain, collective rationality, unanimity preservation, nondictatorship and propositionwise independence. But it is only partially known for which agendas it is possible to respect additional requirements, notably non-oligarchy, anonymity, no individual veto power, or implication preservation. We fully characterize the agendas for which there are such possibilities, thereby (...)
    No categories
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  43.  18
    The problem of constrained judgment aggregation.Franz Dietrich & Christian List - 2010 - In Thomas Uebel, Stephan Hartmann, Wenceslao Gonzalez, Marcel Weber, Dennis Dieks & Friedrich Stadler (eds.), The Present Situation in the Philosophy of Science. Springer. pp. 125-139.
    Group decisions must often obey exogenous constraints. While in a preference aggregation problem constraints are modelled by restricting the set of feasible alternatives, this paper discusses the modelling of constraints when aggregating individual yes/no judgments on interconnected propositions. For example, court judgments in breach-of-contract cases should respect the constraint that action and obligation are necessary and sufficient for liability, and judgments on budget items should respect budgetary constraints. In this paper, we make constraints in judgment aggregation explicit (...)
    Direct download (5 more)  
     
    Export citation  
     
    Bookmark  
  44.  65
    The Logic of Group Decisions: Judgment Aggregation.Gabriella Pigozzi - 2015 - Journal of Philosophical Logic 44 (6):755-769.
    Judgment aggregation studies how individual opinions on a given set of propositions can be aggregated to form a consistent group judgment on the same propositions. Despite the simplicity of the problem, seemingly natural aggregation procedures fail to return consistent collective outcomes, leading to what is now known as the doctrinal paradox. The first occurrences of the paradox were discovered in the legal realm. However, the interest of judgment aggregation is much broader and extends to (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  45. Judgment aggregation with consistency alone.Franz Dietrich & Christian List - 2007 - Department of Government, London School of Economics and Political Science.
    All existing impossibility theorems on judgment aggregation require individ- ual and collective judgment sets to be consistent and complete (in some recent results with completeness relaxed to deductive closure), arguably a demand- ing rationality requirement. They do not carry over to aggregation functions mapping pro…les of (merely) consistent individual judgment sets to (merely) consistent collective ones. We prove that, whenever the agenda of propositions under consideration exhibits mild interconnections, any such aggregation func- tion that (...)
    No categories
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark  
  46.  42
    Premise independence in judgment aggregation.Gabriella Pigozzi & L. van der Torre - manuscript
    ment on the same propositions, and is plagued by impossibility re- 2. What is the role of independence in judgment aggregation sults. In this paper we study the central notion of independence in..
    Direct download  
     
    Export citation  
     
    Bookmark   3 citations  
  47. The premiss-based approach to judgment aggregation.Franz Dietrich & Philippe Mongin - 2010 - Journal of Economic Theory 145 (2):562-582.
    In the framework of judgment aggregation, we assume that some formulas of the agenda are singled out as premisses, and that both Independence (formula-wise aggregation) and Unanimity Preservation hold for them. Whether premiss-based aggregation thus defined is compatible with conclusion-based aggregation, as defined by Unanimity Preservation on the non-premisses, depends on how the premisses are logically connected, both among themselves and with other formulas. We state necessary and sufficient conditions under which the combination of both (...)
    Direct download (7 more)  
     
    Export citation  
     
    Bookmark   26 citations  
  48. Corporate responsibility and judgment aggregation.Frank Hindriks - 2009 - Economics and Philosophy 25 (2):161-177.
    Paradoxical results concerning judgment aggregation have recently been invoked to defend the thesis that a corporate agent can be morally responsible for a decision without any of its individual members bearing such responsibility. I contend that the arguments offered for this irreducibility thesis are inconclusive. They do not pay enough attention to how we evaluate individual moral responsibility, in particular not to the role that a flawed assessment of the normative reasons that bear on the issue to be (...)
    Direct download (10 more)  
     
    Export citation  
     
    Bookmark   18 citations  
  49.  26
    Strategic manipulation in judgment aggregation under higher-level reasoning.Zoi Terzopoulou & Ulle Endriss - 2021 - Theory and Decision 92 (2):363-385.
    We analyse the incentives of individuals to misrepresent their truthful judgments when engaged in collective decision-making. Our focus is on scenarios in which individuals reason about the incentives of others before choosing which judgments to report themselves. To this end, we introduce a formal model of strategic behaviour in logic-based judgment aggregation that accounts for such higher-level reasoning as well as the fact that individuals may only have partial information about the truthful judgments and preferences of their peers. (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  50. Collective Wisdom: Lessons from the Theory of Judgment Aggregation.Christian List - 2012 - In J. Elster & H. Landemore (eds.), Collective Wisdom: Principles and Mechanisms. Cambridge University Press.
    Can collectives be wise? The thesis that they can has recently received a lot of attention. It has been argued that, in many judgmental or decision-making tasks, suitably organized groups can outperform their individual members. In this paper, I discuss the lessons we can learn about collective wisdom from the emerging theory of judgment aggregation, as distinct from the literature on Condorcet’s jury theorem.
    Direct download  
     
    Export citation  
     
    Bookmark   4 citations  
1 — 50 / 934