[shakethemonkey]

The data might just show that offering 50 inch TVs to someone who just bought one is actually a rich opportunity. Perhaps both televisions were stolen in a burglary. Or someone is finally upgrading all their televisions from CRT to flat screen -- maybe they moved from a house to a small apartment. It would not surprise me in the least if people were 10 times more likely to purchase a television having just bought one, compared to individuals randomly selected.