psp sales

[Viper1]

ivanpgcs said:

Why is there so much difference between sony psp shipments and VGC data?

sony total psp shipments ->61.5 m http://news.vgchartz.com/news.php?id=80014&mp=1 

VGChartz Hardware data for the period 05th Dec 2004 to 03rd Apr 2010: 57,632,824 

http://vgchartz.com/hwtable.php?cons[]=PSP®[]=Total&start=38333&end=40272

 

But nintendo ds shipment ->128.89m  http://news.vgchartz.com/news.php?id=79945

VGChartz Hardware data for the period 21st Nov 2004 to 03rd Apr 2010: 127,966,736

http://vgchartz.com/hwtable.php?cons[]=DS®[]=Total&start=38319&end=40272

Also, for comparison:

PS2 Sony total shipment 144.5m http://news.vgchartz.com/news.php?id=80014&mp=1

PS2 VGC sales 136.40 http://gamecharts.vgchartz.com/hardware_totals.php

in short, why the difference between Sony and VGC  data are 3.868m  aprox., and the difference between Nintendo and VGC data are 0.924m aprox. (with last financial results)? Are there 3.8 million of PSP in stores?

Prior to April 1, 2007, Sony reported units manufactured as "sold".  This lead to large discrepencies between Sony's reported figures and figures reported as sold to consumers by all retail tracking firms including NPD, GfK-Chart Track, Famitsu and as you've noted, VGC.

After that date, Sony began using the idnustry standard practive of reporting units "sold to retail" as "sold".  This brings reported figures much closer to those reported by the retail tracking forms such as those I listed above.