Pizzanomics: What's the link between cost of a NYC slice and cost of subway ride?

[video link]

Internets Celebrities, starring Dallas Penn and Rafi Kam, is my new favorite internet video series. You'll see these guys on the Boing Boing Video in-flight television channel on Virgin America starting next month. Their latest episode explores the connection between the cost of a slice of pizza in New York City, and the cost of an MTA subway token. From the video description:

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 spots that have been popping up all over Manhattan recently — could these be predicting a lower cost transit authority appearing in our future?

Directed by Casimir Nozkowski, Edited by Corinne Maro, Original Music by Bless 1, Producers: Robin Oye, Jesse Wilson, Cornelius van Gorkom.

(thanks, Jesse Thorn!)