Welchen kausalen Effekt erfahren Freiberufler durch eine freiwillige Berufsverbandsmitgliedschaft auf ihr Erwerbseinkommen? Diese Frage soll durch die Schätzung von Fixed-Effects-Modellen für Männer und Frauen im Rahmen einer mikroökonometrischen Evaluation mit Daten des Sozio-oekonomischen...

The objective of this study is to investigate the factors affecting firm competitiveness in an emerging market-Turkey. In the paper, competitiveness is proxied by a firm's financial performance. The empirical analysis is based on firms listed on Borsa Istanbul and covers the period between 2005...

This paper examines effects of reference pricing for prescription drugs in German social health insurance based on econometric panel data methods. We analyze the effect on ex-factory prices. Moreover, we investigate whether manufacturers adapt prices of their products not subject to reference...

We study regressions with period and group fixed effects and several treatment variables. Under a parallel trends assumption, the coefficient on each treatment identifies the sum of two terms. The first term is a weighted sum of the effect of that treatment in each group and period, with weights...