The power of buttons and being normal

Taxi drivers in New York were worried about adding credit cards to their cabs. The fee (5% of so) would cost them too much, they said.

It turns out that tips are up, way up. They're actually making far more money now.

Why? Because most of the machines offer a shortcut for the tip: $2, $3 or $4.

You can decide to be a cheapskate and hit the $2 button. Except...

Except that if you had paid cash, you probably would have tipped 75 cents for that $4.25 ride. It takes a few more clicks to type...