bigjon said:
yes yoy is good for evaluation, but not good for estimation or prediction, like I say to many factors change. NOW I am reffering to yoy for indvidual systems, yoy for the aggregate market works fine for the most part for prediction (although major macroeconomic changes could alter things, like say a financial crisis, or terrorist attacks or something). Things work for the most part Like, saying software will double, oct to nov, then from nov to dec. But that does not work as well for (or at all for smaller units). |
I don't think anyone is using it for predictions, except perhaps to say that PS3 sales should be down YoY since they were significantly down during the holidays.
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