Price Deflators for High Technology Goods and the New Buyer Problem
This paper uses an idea introduced by Fisher and Griliches (1995) and Griliches and Cockburn (1995) to develop price indexes for goods that are not purchased in each period. A comparison of the resulting price indexes with those calculated under the standard assumption suggests that the sharp declines typically exhibited by price indexes for many high technology goods may be overstated.
Link
http://econwpa.wustl.edu:80/eps/io/papers/0502/0502009.pdf