As it is possible to read in the interesting working paper titled "Does Private Equity change the performance of a European firm in which it invested?", Oleg Badunenko, Christopher F. Baum, and Dorothea Schäfer, German Institute for Economic Research (DIW−Berlin), Department of Innovation, Industry, and Service, Berlin, Germany (link at the paper), the MORE rating (link), thanks to the accuracy and the quality of its results, could be effectively used in the study of the relation between private equity investment and the performance of the firms. The study has been performed on both listed and unlisted European firms during 1992−2007: thanks to the MORE rating capability, the results are perfectly comparable between countries and years.
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