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Is the Boone-Indicator Applicable? Evidence from a Combined Data Set of German Manufacturing Enterprises

Boone (2008a) proposes a new competition measure based on Relative Profit Differences (RPD) that, from its theoretical properties, proves to be more robust than the Lerner-Index. However, the proof of the empirical practicability and robustness of the Boone-Indicator is missing. To fill this gap, we use a rich, newly built, data set for German manufacturing enterprises and test its empirical validity ...

Entwicklung eines allgemeinen Gleichgewichtsmodells zur Analyse preispolitischer Maßnahmen im Verkehr

Zur Verbesserung der Umweltbilanz der Verkehrsträger oder auch zur Finanzierung von Straßeninfrastruktur werden verschiedene preispolitische Maßnahmen wie zum Beispiel die CO2-Steuer oder die Pkw-Maut diskutiert. Um ex-ante-Bewertung von Maßnahmen durchführen zu können, sind geeignete Instrumente der Wirkungsanalyse erforderlich. Gegenstand dieses Artikels ist die Beschreibung eines allgemeinen Gleichgewichtsmodells, ...

Poverty in Germany: Statistical Inference and Decomposition

Based on six harmonized cross-sections of the German Sample Survey of Income and Expenditure, we study inter-temporal changes in poverty from year 1978 to 2003. Results are decomposed by region and household types, and the bootstrap method is applied to test for the statistical significance of all our findings. Across household types, single parents with children have the highest poverty risk. Most ...

Fractional Cointegration in US Term Spreads

This note examines the stochastic properties of US term spreads with parametric and semi-parametric fractional integration techniques. Since the observed data (rather than the estimated residuals from a cointegrating regression) are used for the analysis, standard methods can be applied. The results indicate that US Treasury maturity rates are I(1) in most cases, although the order of integration decreases ...

A Factorial Survey on the Justice of Earnings within the SOEP-Pretest 2008

Google Searches as a Means of Improving the Nowcasts of Key Macroeconomic Variables

The Google Insights data are a collection of recorded Internet searches for a huge number of the keywords, which are available since January 2004. These searches represent a kind of revealed perceptions of Internet users, which are a (possibly not entirely representative) sample of the general public. These data can be used to improve the short-term forecasts or nowcasts of various macroeconomic variables. ...

Support Vector Machines: eine neue Methode zum Rating von Unternehmen

Die Rekordzahlen an Unternehmensinsolvenzen, die schlechte Ertragslage der deutschen Kreditinstitute in den vergangenen Jahren und der von Basel II ausgehende Druck zur Verwendung von realitätsnahen Ausfallwahrscheinlichkeiten haben es überdeutlich gemacht: Der Bedarf an leistungsfähigen Insolvenzprognosemodellen ist immens. Mehr denn je suchen Banken, aber auch andere Finanzdienstleister wie Venture-Capital-Firmen ...

Zeitpräferenzen von Kindern im Vorschulalter: eine experimentelle Untersuchung im Rahmen des Sozio-oekonomischen Panels (SOEP)

Does the ECB Rely on a Taylor Rule? Comparing Ex-post with Real Time Data

We assess the differences that emerge in Taylor rule estimations for the ECB when using ex-post data instead of real time forecasts and vice versa. We argue that previous comparative studies in this field mixed up two separate effects. First, the differences resulting from the use of ex-post and real time data per se and, second, the differences emerging from the use of non-modified real time data ...

Estimating Welfare Indices: Household Weights and Sample Design