We use publicly available price data from the German cement industry to estimate the cartelinduced price increase. We apply two different comparator-based approaches - the 'before and-after' approach and the 'difference-in-differences' approach - and especially study the impact of various assumptions on the transition period from the cartel period to the non-cartel period on the overcharge estimate. We find that the cement cartel led to price overcharges in a range from 20.3 to 26.5 percent depending on model approach and model assumptions.
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