We show in a public goods experiment on three continents that conditional cooperation is a universal behavioral regularity. Yet, the number of conditional cooperators and the extent of conditional cooperation are much higher in the U.S.A. than anywhere else.

Wie viele Jugendliche können in den kommenden Jahren überhaupt noch für einen Ausbildungsplatz im dualen System gewonnen werden? Das Diskussionspapier geht dieser Frage nach und berechnet die Entwicklung des Nachfragepotenzials bis zum Jahre 2020. Unter Nachfrage wird dabei das Interesse...

Im vorliegenden Diskussionspapier wird die empirische Datenlage zu den zweijährigen Ausbildungsberufen auf Basis der jährlichen Statistiken zu den Ausbildungsverträgen systematisch aufbereitet. Zur Einschätzung der quantitativen Bedeutung wird die langfristige Entwicklung der...

Im Bereich der beruflichen Vollzeitschulen gibt es in Deutschland verschiedene Schularten mit einem umfangreichen Spektrum an Bildungsgängen. Um die heterogene Bildungslandschaft in diesem Bereich transparent zu machen, zeigt das vorliegende Diskussionspapier die unterschiedlichen Schularten...

Compensation schemes in which land owners receive payments for voluntarily managing their land in a biodiversity-enhancing manner have become one of the most important instruments for biodiversity conservation worldwide. One key challenge when designing such schemes is to account for the spatial...

This paper develops a general equilibrium model to measure welfare effects of taxes for correcting environmental externalities caused by domestic trade, focusing on exter- nalities that arise through exports. Externalities from exports come from a number of sources. Domestically owned ships,...

We examine consumer certainty of future preferences and overconfidence in predicting future preferences. We explore how preference certainty and overconfidence impact the option value to revise today's decisions in the future. We design a laboratory experiment that creates a controlled choice...

While becoming a parent is transformational as one focuses more on the future, the time constraints are more binding right now. Using a unique data set that allows us to compare CO2 emissions from Swedish two-adult households with and without children, we find becoming a Swedish parent causes a...

We examine the causes and policy consequences of strategic (willful) ignorance of risk as an excuse to overengage in risky health behavior. In an experiment on Copenhagen adults, we allow subjects to choose whether to learn the calorie content of a meal before consuming it, and measure their...

How does a choice experiment (CE) model derived under standard preference axioms perform for respondents with incomplete preferences? Using simulated data, we show how such miss-specification results in unnecessary noise and bias in welfare estimates, and can be avoided.