“It’s a tricky transitional period,” said Christopher K. Anderson, a faculty member at the Cornell University School of Hotel Administration. The industry, he said, is adopting new technologies but at the same time the hotels are very competitive in vying for customers. “The world of digital selling is more complex for hoteliers,” Mr. Anderson said, adding that companies like TripAdvisor with its instant booking service and Google were transitioning to models that resemble online travel agencies. The move to third-party sites has proved hard for hotel chains to ignore. In June, TripAdvisor announced an agreement with Marriott that allows travelers shopping for hotel rooms on its site to book directly at any of Marriott’s 4,200 properties worldwide without leaving the website. TripAdvisor said more recently that it had added partnerships with the Priceline Group to include its Booking.com brand, with 840,000 properties worldwide. The site has also signed other hotel partners including Wyndham Worldwide, Hyatt Hotels and Carlson Rezidor Hotel Group, all of which do not offer reward points through TripAdvisor. Google started a program last fall called Google Hotel Ads, which allows travelers to book on a personal computer, tablet or smartphone. Get the full story at The New York Times