Axord said:
Eh, I'd say any change of around 10k could be reasonably attributed to "consumer randomness".
It'd be better to consider percentage change; 10K is a small difference for DS but huge for X360. PSP's 35% jump is pretty big for randomness. It didn't jump that much for Golden Week.
Previous times PSP has jumped 35% or more from the previous week. Usually it's during the Decemberish holiday period when big bumps occur.
Week of 2007-09-12: 217% This was the week of white PSP, FF VII Advent Children, and Winning Eleven PSP.
Week of 2005-11-14: 90%
Week of 2005-11-28: 80%
Week of 2005-12-19: 69%
Week of 2006-02-27: 36% Valkyrie Proile bump, I guess.
Week of 2006-11-20: 85%
Week of 2006-12-11: 69%
Week of 2006-12-18: 183%
Week of 2007-01-01: 72%
Week of 2007-02-19: 190% Monster Hunter 2
Looking at things another way, I looked for the average absolute value of percentage change for PSP among weeks with 50% or less change. Arbitrary cutoff, meant to cut off those freak 90% weeks. Anyway, average is 13%, usually ranging from 5-21%, so 35 is quite irregular.