Trades in DAX index options with identical maturities cluster around particular classes of strike prices. For example, options with strikes ending on 50 are less traded than options with strikes ending on 00. Clustering is higher when options with close strike prices are good substitutes. The...

The recent introduction of the realized variance measure defined as the sum of the squared intra-daily returns stamped on some high frequency basis has spurred the research in the field of volatility modeling and forecasting into new directions. First, the realized variance is a much better...

In this paper we propose and estimate an econometric model for the distribution of trading activity across options written on the DAX index. The model is based on the observation that in this market options with strike prices ending on 000, 200, 400, 600 and 800 (the class of 200-strike options)...

Holmström’s (1982/99) career concerns model has become an important workhorse for the analysis of agency issues in many fields. The underlying signal jamming argument requires players to use information in a Bayesian way – which may or may not reasonably approximate real-life decision...

Das vorliegende Papier schätzt auf Basis eines Probit-Modells die Wendepunkte des ifo-Geschäftserwartungsindex. Die übliche Vorgehensweise in der wissenschaftlichen Literatur wird um zwei Aspekte erweitert: Erstens werden zusätzlich zu einzelnen Variablen sogenannte Faktoren berücksichtigt,...

Das vorliegende Papier schätzt auf Basis eines Probit-Modells die Wendepunkte des ifo-Geschäftserwartungsindex. Die übliche Vorgehensweise in der wissenschaftlichen Literatur wird um zwei Aspekte erweitert: Erstens werden zusätzlich zu einzelnen Variablen sogenannte Faktoren berücksichtigt,...

We evaluate two variants of a school-based, intensive learning camp for pupils who are assessed 'not ready' for further education after compulsory school, using a stratified cluster randomized trial involving 15,559 pupils in 264 schools in Denmark. Next to training pupils in Danish and...

To study the effects of reminder nudges in complex environments, we apply a novel experimental approach based on a computer game in which decision makers have to pay attention to and perform multiple actions within a short period of time. The set-up allows us, first, to test the effect of...

Holmström?s (1982/99) career concerns model has become an important workhorse for the analysis of agency issues in many fields. The underlying signal jamming argument requires players to use information in a Bayesian way – which may or may not reasonably approximate real-life decision makers?...

Free riding in team production arises because individual effort is not perfectly observable. It seems natural to suppose that greater transparency would enhance incentives. Therefore, it is puzzling that team production often lacks transparency about individual contributions despite negligible...