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Andrew Sullivan does

“‘Decide,’ just in time for Black Friday, helps you learn whether the price of a product is about to fall.  How does it accomplish this magic?  The five Ph.D.’s on its staff don’t hurt.  Together they’ve created an algorithm that predicts a gadget’s future price based, among other factors, on the historical price data of other gadgets in its class. Along with a suggestion of whether to buy a product now or wait for a better price or new model, the app supplies a confidence score, a price and model history, and new-product rumors from around the web.  So far, CEO Mike Fridgen says it has predicted price with 77% accuracy.”

(, founded by UW CSE professor Oren Etzioni and four UW alums, today is 80% staffed by UW alums.)