Identifying Collusion in English Auctions ∗

  title={Identifying Collusion in English Auctions ∗},
  author={Vadim Marmer},
We develop a fully nonparametric identification framework and a test of collusion in ascending bid auctions. Assuming efficient collusion, we show that the underlying distributions of values can be identified despite collusive behaviour when there is at least one bidder outside the cartel. We propose a nonparametric estimation procedure for the distributions of values and a bootstrap test of the null hypothesis of competitive behaviour against the alternative of collusion. Our framework allows… CONTINUE READING

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