This paper empirically evaluates the effects of a merger between the two largest book retail chains in the UK. We build an original dataset of book titles with data on the prices at the store level and at the national level. We then apply difference-in-differences techniques to assess the impact...

We investigate the welfare impact of parallel imports using a large panel data set containing monthly information on sales, ex-factory prices, and further product characteristics for all 700 antidiabetic drugs sold in Germany between 2004 and 2010. We estimate a two-stage nested logit model of...

This paper investigates the effect of a housing company's size on the outcome of energetic refurbishment. We argue that economies of scale, economies of scope and effects of learning have an impact on the production of energy-efficient housing services. To test our hypothesis, we use unique data...