In this paper, we present an empirical methodology to determine aggregate numerical criteria weights from group ordinal ranks of multiple decision criteria. Assuming that such ordinal ranks are obtained from several decision makers, aggregation procedures are proposed to combine individual rank...

The Condorcet Jury Theorem is derived from the implicit assumption that jury members only commit one type of error. If the probability of this error is smaller than 0.5, then group decisions are better than those of individual members. In binary decision situations, however, two types of error...

The Condorcet jury-theorem is derived from the implicit assumption that jury members may only commit one type of error. In binary decision situations however, two error types may occur, the probability of which is independent of each other. Taking this into account leads to a generalization of...

The Condorcet jury-theorem is derived from the implicit assumption that jury members may only commit one type of error. In binary decision situations however, two error types may occur, the probability of which is independent of each other. Taking this into account leads to a generalization of...

The risk preferences of three-person groups and individuals are compared using a non-sequential repeated-measures lottery experiment with $20 per-player win percentages varying from 10% to 90%. Analysis based on independent samples of certainty equivalent ratios (certainty equivalent/expected...

This paper reports an experiment designed to test whether prior consultation within a group affects subsequent individual decision making in tasks where demonstrability of correct solutions is low. In our experiment subjects considered two paintings created by two different artists and were...

Extending the die rolling experiment of Fischbacher and Föllmi-Heusi (2013), we compare gender effects with respect to unethical behavior by individuals and by two-person groups. In contrast to individual decisions, gender matters strongly under group decisions. We find more lying in male...

Extending the die rolling experiment of Fischbacher and Föllmi-Heusi (2013), we compare gender effects with respect to unethical behavior by individuals and by two-person groups. In contrast to individual decisions, gender matters strongly under group decisions. We find more lying in male...

We study higher-order risk preferences, i.e. prudence and temperance, next to risk aversion in social settings. Previous experimental studies have shown that higher-order risk preferences affect the choices of individuals deciding privately on lotteries that only affect their own pay-off. Yet,...