Interesting analysis of holiday numbers using past NPD data

[NJ5]

Of course there are all sorts of factors involved (price cuts, bundles, etc). But that kind of stuff happens pretty much in every Christmas, what this analysis shows us is how much demand we can reasonably expect for each product.

The fact that the multipliers were so stable in previous years may well mean this is a pretty accurate rule.

EDIT - after dividing the numbers, I can see that it's not quite as stable as the writer makes it seem. November seems to be anywhere from 2 to 3.