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UID:calendar.128741.field_date.0@www.tse-fr.eu
DTSTAMP:20260311T092903Z
CREATED:20220524T111001Z
DESCRIPTION:Meng Liu (Washington University in Saint Louis)\, “Designing Qu
 ality Certificates: Insights from eBay”\, Economics of Platforms Seminar\,
  May 31\, 2022\, 14:00–15:00\, Zoom Meeting.\n\nQuality certification is a
  common tool to reduce asymmetric information and enhance trust in marketp
 laces. Should the certificate focus on seller inputs such as fast shipping
 \, or include output measures such as consumer ratings? In theory\, incorp
 orating output measures makes the certificate more relevant for consumer e
 xperience\, but doing so may discourage seller effort because outputs can 
 be driven by random factors out of seller control. To understand this trad
 eoff\, we study a major redesign of eBay's Top Rated Seller (eTRS) program
  in 2016\, which removed most consumer reports from the eTRS criteria and 
 added direct measures of seller inputs. This change generates immediate se
 lection on certified sellers\, and homogenizes the share of certified sell
 ers across product categories of different criticalness in consumer rating
 s. Post the regime change\, sellers improve in the input measures highligh
 ted in the new certificate. These effects are more conspicuous in categori
 es that had less critical consumer ratings\, in part because the new algor
 ithm automatically removes the potential negative bias for sellers in crit
 ical markets and a clearer threshold motivates sellers to just reach the t
 hreshold. The new regime also makes sales more concentrated towards large 
 sellers\, especially in the categories that face more critical consumers.
DTSTART;TZID=Europe/Paris:20220531T150000
DTEND;TZID=Europe/Paris:20220531T160000
LAST-MODIFIED:20260113T095129Z
LOCATION:May 31\, 2022\, 14:00–15:00\, Zoom Meeting
SUMMARY:Economics of Platforms Seminar
URL;TYPE=URI:https://www.tse-fr.eu/seminars/2022-designing-quality-certific
 ates-insights-ebay
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