Internet Celebrities: A Fare Slice

In 1980, New Yorker Eric Bram noticed that for twenty years the price of a subway token had tended to match the price of a slice of pizza. Thirty years later, his hypothesis still holds true. The question we wanted answered is WHY. Are the MTA and the various supposedly independent pizza shops involved in collusion - or who's taking their pricing cues from who? And what about the dollar pizza