The Decoy Effect, a psychological trick that can influence what you buy and who you vote for

I kind of feel sorry for post office workers who are clearly ordered to up sell me every time I just want to send a first class letter. The PO even took out all the stamp machines, saying they were out of date. I suspect they took them out based on the idea that having to buy stamps at the counter was an upsel opportunity for the PO, and eff customer service and convenience.

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