The typical judgment aggregation problem in economics and other …elds is the following: A group of people has to judge/estimate the value of an uncertain variable y which is a function of k other variables, i.e. y = D(x1; :::xk) . We analyze when it is possible for the group to arrive at collective judgements on the variables that respect D. We consider aggregators that ful…ll Arrow’s IIA-condi...

The new …eld of judgment aggregation aims to …nd group judgments on logically interconnected propositions. Recent impossibility results have established limitations on the possibility to vote independently on the propositions, hence notably on the possibility to use quota rules (rules with acceptance thresholds for the propositions). I show that, fortunately, the impossibilities fail to apply t...

Suppose the members of a group (e.g., committee, jury, expert panel) each form a judgment on which worlds in a given set are possible, subject to the constraint that at least one world is possible but not all are. The group seeks to aggregate these individual judgments into a collective judgment, subject to the same constraint. I show that no judgment aggregation rule can solve this problem in ...

This article proposes that Kroch’s (1989) Constant Rate Hypothesis—the generalization that contextual effects tend to be stable in processes of diachronic variation in production data—be extended to synchronic variation in controlled judgment data. Two recent, large-sample judgment experiments are discussed suggesting that shared contextual effects across speakers in acceptability judgments can...

Excess entry – or the high failure rate of market-entry decisions – is often attributed to overconfidence exhibited by entrepreneurs. We show analytically that whereas excess entry is an inevitable consequence of imperfect assessments of entrepreneurial skill, it does not imply overconfidence. Judgmental fallibility leads to excess entry even when everyone is underconfident. Self-selection impl...

In judgment aggregation, unlike preference aggregation, not much is known about domain restrictions that guarantee consistent majority outcomes. We introduce several conditions on individual judgments su¢ cient for consistent majority judgments. Some are based on global orders of propositions or individuals, others on local orders, still others not on orders at all. Some generalize classic soci...

DEVELOPMENT AND TEST OF A THEORY OF APPLICANT REACTIONS TO BRANCHED SITUATIONAL JUDGMENT TESTS Craig Matthew Reddock Old Dominion University, 2017 Director: Dr. Richard N. Landers Branched situational judgment tests (BSJTs) are a recent innovation in personnel selection. Yet, there is little research supporting their use. Data from a qualitative pilot study indicated that BSJTs are expected to ...