Shares of TripAdvisor fell 23 percent on Tuesday, while shares in Priceline declined 13.5 percent. Rival Expedia Inc’s shares skidded another 2.74 percent and are down 19 percent since Oct. 26, the day before the company reported weaker-than-expected third quarter results. Though the circumstances at the three companies vary, they all are encountering increased competition from sites such as Airbnb and others that offer alternatives to traditional hotels. Hotel chains also are putting up a tougher fight for the online sites’ business. “We’re a big business now,” Priceline Chief Executive Officer Glenn Fogel said on the group’s third-quarter call on Monday. “And as one finds in large numbers, (growth) rates naturally slow down.” Get the full story at Reuters