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α: calibrated so average coauthorship-adjusted count equals average raw count
The Eurosystem purchased €178 billion of corporate bonds between June 2016 and December 2018 under the Corporate Sector Purchase Programme (CSPP). Did these purchases lead to a deterioration of liquidity conditions in the corporate bond market, thus raising concerns about unintended consequences of large-scale asset purchases? To answer this question, we combine the Bundesbank's detailed CSPP purchase records with a range of liquidity indicators. We find that while the flow of purchases initially supported secondary market liquidity by providing a predictable source of demand, liquidity conditions deteriorated in the long-run as the Bundesbank reduced the stock of corporate bonds available for trading in the secondary market.