Differing attitudes towards environmental issues between men and women as policymakers may affect policies and actions. Accordingly, this research analyses the issue of the causal relationship between women politicians and the level of air pollution. The analysis tests for this in Italy,...

The study investigates the influence of intra-African trade on Africa's macroeconomic performance. To mitigate potential biases, the paper employs a two-step estimation technique (2SLS). In the first step, the paper uses Poisson pseudo maximum likelihood (PPML) to estimate the gravity model for...

We estimate schedules of declining discount rates for cost benefit analysis in the UK. We highlight the importance of model selection for this task and hence for the evaluation of long-term investments, namely climate change prevention and nuclear build.

Pretesting for exogeneity has become a routine in many empirical applications involving instrumental variables (IVs) to decide whether the ordinary least squares (OLS) or the IV-based method is appropriate. Guggenberger (2010) shows that the second-stage t-test – based on the outcome of a...

The properties of two goodness-of-fit measures are analyzed for the instrumental variables model. One measure is based on the two-step approach to IV estimation and is equal to the coefficient of determination in the second stage equation. This measure therefore measures the fit of a...

This paper puts forward a new instrumental variables (IV) approach for linear panel data models with interactive effects in the error term and regressors. The instruments are transformed regressors and so it is not necessary to search for external instruments. The proposed method asymptotically...

The ultimate objective of the present paper is to empirically investigate the effectiveness of competition policy in developed and developing countries. Although its importance is continuously increasing, the effectiveness of competition policy still seems to lack the attention that it would...

Do Body-Worn Cameras improve police efficiency? This study answers this question in the context of a sample of local police agencies in the US, where the adoption of BWCs by police agencies has increased significantly in recent years. To estimate the effects of BWCs on police efficiency, I...

Do Body-Worn Cameras improve police efficiency? This study answers this question in the context of a sample of local police agencies in the US, where the adoption of BWCs by police agencies has increased significantly in recent years. To estimate the effects of BWCs on police efficiency, I...

Do Body-Worn Cameras improve police efficiency? This study answers this question in the context of a sample of local police agencies in the US, where the adoption of BWCs by police agencies has increased significantly in recent years. To estimate the effects of BWCs on police efficiency, I...