WSJ:
The fast-moving Internet pricing games used by airlines and hotels are now moving deeper into the most mundane nooks of the consumer economy. Deploying a new generation of algorithms, retailers are changing the price of products from toilet paper to bicycles on an hour-by-hour and sometimes minute-by-minute basis. The pricing wars were fought last month over a General Electric microwave oven. Sellers on Amazon.com Inc. changed its price nine times in one day, with the price fluctuating between $744.46 and $871.49, according to data compiled by consumer-price research firm Decide Inc. Photo by .