Pradeep Chintagunta, Harikesh Nair, and R. Sukumar, "Measuring Marketing 
Mix Effects in the Video-Game Console Market", Journal of Applied 
Econometrics, Vol. 24, No. 3, 2009, pp. 421-445.

The data used in this paper are the property of NPD Techworld Inc. who do
not permit open access. Hence the data cannot be lodged here.  The data are
available from NPD (www.npd.com) to whom enquiries concerning access should
be addressed. The authors have signed non-disclosure agreements with NPD for
their use of the data.

The analysis in the paper is based on data for one generation of the
videogames industry. In particular, our dataset contains monthly data on the
number of units sold of all 32/64-bit consoles that include Sony PS1, Sega
Saturn (both 32-bit machines), and Nintendo N64 (64-bit machine). The data
are at the category level (i.e., not for each firm's console) and span the
range from May 1995 (when Sega Saturn was introduced) until September 2002. 

The data are in one file which provides monthly retail sales of all consoles
availble in the US. Both dollar sales and unit sales are available as
separate variables, from which an average price variable is constructed as
described in the paper. The data also contain the dollar sales and unit
sales of video games released during this period. The variable "number of
games available" used in the paper is constructed by counting all games in a
given month that had positive retail sales. 

Unit sales for a few missing months were extrapolated prior to the analysis.

Pradeep Chintagunta
Harikesh Nair