Heterogeneous Treatment Effects in Groups
Gerhard Riener, Simon Wiederhold
Economics Letters,
Nr. 3,
2013
Abstract
We show in a laboratory experiment that the same method of group induction carries different behavioral consequences. These heterogeneous treatment effects can be directly related to the quality of the relationship established between the subjects. Our results indicate the importance of manipulation checks in group-formation tasks in economic experiments.
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Der Einfluss des Fernsehkonsums auf unsere Präferenzen
Walter Hyll, Lutz Schneider
Wirtschaft im Wandel,
Nr. 2,
2013
Abstract
Fernsehen kann heutzutage als Freizeitbeschäftigung Nummer eins angesehen werden. Angesichts der großen Bedeutung dieses Mediums geht der Beitrag der Frage nach, ob Fernsehkonsum unser Verhalten und unsere Präferenzen beeinflusst. Um einen potenziellen Effekt methodisch einwandfrei identifizieren zu können, macht sich die Untersuchung ein einzigartiges natürliches Experiment innerhalb der DDR zunutze. Aufgrund von topographischen Gegebenheiten war es in einzelnen Regionen der DDR nicht möglich, Westfernsehprogramme zu empfangen. Dadurch kam es zu einer natürlichen Variation der Empfangsqualität. Die ökonometrische Analyse von Umfragedaten des Zentralinstituts für Jugendforschung der DDR aus den Jahren 1988/1989 kommt zu dem Ergebnis, dass der Konsum von Westfernsehen die materiellen Aspirationen, also die Konsum- und Einkommenswünsche, erhöht hat.
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Bottom-up or Direct? Forecasting German GDP in a Data-rich Environment
Katja Drechsel, Rolf Scheufele
Abstract
This paper presents a method to conduct early estimates of GDP growth in Germany. We employ MIDAS regressions to circumvent the mixed frequency problem and use pooling techniques to summarize efficiently the information content of the various indicators. More specifically, we investigate whether it is better to disaggregate GDP (either via total value added of each sector or by the expenditure side) or whether a direct approach is more appropriate when it comes to forecasting GDP growth. Our approach combines a large set of monthly and quarterly coincident and leading indicators and takes into account the respective publication delay. In a simulated out-of-sample experiment we evaluate the different modelling strategies conditional on the given state of information and depending on the model averaging technique. The proposed approach is computationally simple and can be easily implemented as a nowcasting tool. Finally, this method also allows retracing the driving forces of the forecast and hence enables the interpretability of the forecast outcome.
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11.04.2013 • 13/2013
TV-Konsum weckt Konsumwünsche – Im Tal der Ahnungslosen war man weniger materialistisch
Fernsehkonsum beeinflusst unsere materiellen Präferenzen. Zu diesem Ergebnis kommt eine Untersuchung des Instituts für Wirtschaftsforschung Halle (IWH). Um den Effekt methodisch einwandfrei identifizieren zu können, machen sich die Autoren der Studie ein einzigartiges natürliches Experiment innerhalb der DDR zunutze. Aufgrund von topographischen Gegebenheiten konnten die Menschen in bestimmten Regionen der DDR wie im Bezirk Dresden kein Westfernsehprogramm empfangen, während es andernorts möglich war. Die Analyse von Umfragedaten des Zentralinstituts für Jugendforschung der DDR aus den Jahren 1988/1989 belegt, dass Bevölkerungsgruppen, die Westfernsehen konsumierten, höhere Ansprüche an Konsum und Einkommen hatten als die Bewohner im Dresdner „Tal der Ahnungslosen“.
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Teacher Experience and the Class Size Effect - Experimental Evidence
Steffen Müller
Journal of Public Economics,
2013
Abstract
We analyze teacher experience as a moderating factor for the effect of class size reduction on student achievement in the early grades using data from the Tennessee STAR experiment with random assignment of teachers and students to classes of different sizes. The analysis is motivated by the high costs of class size reductions and the need to identify the circumstances under which this investment is most rewarding. We find a class size effect only for senior teachers. The effect exists at all deciles of the achievement distribution but is less pronounced at lower deciles. We further show that senior teachers outperform rookies only in small classes. Interestingly, the class size effect is likely due to a higher quality of instruction in small classes.
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The Causal Effect of Watching TV on Material Aspirations: Evidence from the “Valley of the Innocent”
Walter Hyll, Lutz Schneider
Journal of Economic Behavior and Organization,
Nr. 86,
2013
Abstract
The paper addresses the question of whether TV consumption has an impact on material aspirations. We exploit a natural experiment that took place during the period in which Germany was divided. Owing to geographical reasons TV programs from the Federal Republic of Germany could not be received in all parts of the German Democratic Republic. Therefore a natural variation occurred in exposure to West German television. We find robust evidence that watching TV is positively correlated with aspirations. Our identification strategy implies a causal relationship running from TV to aspirations. This conclusion resists various sets of alternative specifications and samples.
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The Causal Effect of Watching TV on Material Aspirations: Evidence from the “Valley of the Innocent”
Walter Hyll, Lutz Schneider
Abstract
The paper addresses the question of whether TV consumption has an impact on material aspirations. We exploit a natural experiment that took place during the period in which Germany was divided. Owing to geographical reasons, TV programs from the Federal Republic of Germany could not be received in all parts of the German Democratic Republic. Therefore, a natural variation occurred in exposure to West German television. We find robust evidence that watching TV is positively correlated with aspirations. Our identification strategy implies a causal relationship running from TV to aspirations. This conclusion resists various sets of alternative specifications and samples.
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The Tradeoff Between Redistribution and Effort: Evidence from the Field and from the Lab
Claudia M. Buch, C. Engel
Max Planck Institute for Research on Collective Goods Working Paper,
Nr. 10,
2012
Abstract
We use survey and experimental data to explore how effort choices and preferences for redistribution are linked. Under standard preferences, redistribution would reduce effort. This is different with social preferences. Using data from the World Value Survey, we find that respondents with stronger preferences for redistribution tend to have weaker incentives to engage in effort, but that the reverse does not hold true. Using a lab experiment, we show that redistribution choices even increase in imposed effort. Those with higher ability are willing to help the needy if earning income becomes more difficult for everybody.
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Forecasting Currency Crises: Which Methods signaled the South African Crisis of June 2006?
Tobias Knedlik, Rolf Scheufele
South African Journal of Economics,
2008
Abstract
In this paper we test the ability of three of the most popular methods to forecast South African currency crises with a special emphasis on their out-of-sample performance. We choose the latest crisis of June 2006 to conduct an out-of-sample experiment. The results show that the signals approach was not able to forecast the out-of-sample crisis correctly; the probit approach was able
to predict the crisis but only with models, that were based on raw data. The Markov-regime- switching approach predicts the out-of-sample crisis well. However, the results are not straightforward. In-sample, the probit models performed remarkably well and were also able to detect, at least to some extent, out-of-sample currency crises before their occurrence. The recommendation is to not restrict the forecasting to only one approach.
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Do Weak Supervisory Systems Encourage Bank Risk-taking?
Claudia M. Buch, G. DeLong
Journal of Financial Stability,
2008
Abstract
Weak bank supervision could give banks the ability to shift risk from themselves to supervisors. We use cross-border bank mergers as a natural experiment to test changes in risk and the impact of supervision. We examine cross-border bank mergers and find that the supervisory structures of the partners’ countries influence changes in post-merger total risk. An acquirer from a country with strong supervision lowers total risk after a cross-border merger. However, total risk increases when the target bank is located in a country with relatively strong supervision. This result is consistent with strong host regulators limiting the risky activities of their local banks. Foreign-owned competitors could then engage in the risky projects, especially if the foreign banks’ supervisors are not strong. An acquirer entering a country with strong supervision appears to shift risk back to its home country. The results suggest that bank supervisors can reduce total banking risk in their countries by being strong.
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