Data used (continued)

• Usually convenience stores start to sell new CDs from 3pm on the day before the officially announced release date by record companies. They generally open stores for 24 hours. The original data are disguised for proprietary reasons and the day before the announced release date is treated as a one half-day duration for our analyses.

  • Period for data collection: 10/14/97-7/09/99
  • Number of CDs: 121
  • Number of data points: 56 days/CD

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