Sample selection models, variants of which are the Heckman and Heckit models, are increasingly used by political scientists to accommodate data in which censoring of the dependent variable raises concerns of sample selectivity bias. Beyond demonstrating several pitfalls in the calculation of...

A longstanding question in the study of energy demand concerns the role of information as a determinant of home-efficiency improvements. Although the provision of information via home energy audits is frequently asserted to be an effective means for governments to encourage the implementation of...

Drawing on German household data from 1992 to 2011, this paper analyzes how couples allocate housework against the backdrop of three questions: (1) Does an individual’s contribution to household income - both in absolute and relative terms - influence his or her contribution to housework? (2)...

Interaction effects capture the impact of one explanatory variable x1 on the marginal effect of another explanatory variable x2. To explore interaction effects, socalled interaction terms x1x2 are typically included in estimation specifications. While in linear models the effect of a marginal...

Drawing on individual-level mobility data from Germany between 1996 and 2009, this analysis econometrically investigates the determinants of automobile, public transit, and non-motorized travel against the backdrop of two questions: 1) Does gender play a role in determining the relative use of...

Rebound eff ects measure the behaviorally induced off set in the reduction of energy consumption following effi ciency improvements. Using panel estimation methods and household travel diary data collected in Germany between 1997 and 2009, this study identifi es the rebound eff ect in private...

This note demonstrates that in applied regression analysis, the variance of a coeffi cient of interest may decrease from the inclusion of a control variable, contrasting with Clarke’s assertion (2005, 2009) that the variance can only increase or stay the same. Practitioners may thus be...

The Energy Tax Directive recently proposed by the European Commission envisages to tax fuels based on their energy content. By raising prices for diesel to a level higher than that of petrol, this proposal would eliminate the price advantage currently enjoyed by diesel in most EU Member States....

Using a unique panel dataset, we estimate the impact of the military base realignments and closures (BRACs) in Germany on the intensity of criminal activity surrounding the base. We use a fixed-effect model to account for time-invariant unobservables in our panel of 298 military bases for the...

This note attempts to reconcile a range of primary methods for dealing with price asymmetry, such as the approaches proposed by Tweeten and Quance (1969), Wolffram (1971) and Houk(1977). Using Wolffram’s stylized example, we first illustrate that the notion of asymmetry can be captured in a...