To make things fair, we chose regularly replenished items that all three retailers sell, and we didn't include sale items. (While there are back-to-school sales galore right now, January is prime time for office-supply sales.) To bake in the effect of bulk purchasing, we chose 10 of the largest package of each item.
Republicans argue that even though the bulk of Bush's tax cut won't be felt for years, the entire package would have an immediate, positive psychological effect on the markets and consumers -- if Congress passes it.