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...

About sixty years ago, Hans Albert criticized economists for their "model platonism", a methodological attitude that immunizes theoretical models against empirical criticism. Since then, economics has taken an empirical turn; yet, model platonism lingers on. The root of the problem is...

The double-dividend argument (as used in political debates) addresses worries that a green tax may lead to higher unemployment when wages are inflexible. As protection against this possibility, it is proposed to use the proceeds of the green tax to subsidize employment. In the best case, this...

The paper proves that the Bayesian approach to learning and expectations formation implies no propositions that could conceivably be refuted by observation. For a (non-expanding) universe infinite in time but finite at any point of time, it is shown that by a suitable choice of priors, any...

Der Aufsatz befaßt sich mit der Frage, wie Theoreme der mathematischen Ökonomie getestet werden können und welche Rolle unrealistische Annahmen bei diesen Tests spielen. Als Beispiel dienen die bekannten Theoreme der neoklassischen Außenhandelstheorie, das Faktorpreisausgleichstheorem und...

It is often conjectured that participatory decision making may increase acceptance even of unfavorable decisions. The present paper tests this conjecture in a three-person power-to-take game. Two takers decide which fraction of the responder's endowment to transfer to themselves; the responder...

Using a simple OLG model where the research output of one generation provides inputs for the next, the paper explains how quality standards can become established in scientific competition. Researchers seek status, which they get if their results are used by the next generation. Quality is...