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Effects of minimum bid increment in internet auctions: Evidence from a field experiment

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  • Tukiainen, Janne

Abstract

I study the role of minimum bid increments (MBI) in internet auctions using natural field experiment data from a Finnish online auction site Huuto.net. Internet auctions are typically viewed as secondprice, implying truthful bidding. However, due to the presence of the MBI, equilibrium bidding behavior involves bid shading. I sell otherwise identical gift cards while varying the MBI and test between truthful bidding and bid shading. Truthful bidding is rejected. Consistently with equilibrium behavior, bid shading increases as the MBI increases. This implies that real-world bidders are capable of reacting rationally even to seemingly small variations in their strategic environment. This version (September 17, 2015) replaces the February 15, 2013 version.

Suggested Citation

  • Tukiainen, Janne, 2013. "Effects of minimum bid increment in internet auctions: Evidence from a field experiment," Working Papers 44, VATT Institute for Economic Research.
  • Handle: RePEc:fer:wpaper:44
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    File URL: https://www.doria.fi/handle/10024/148782
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