The idea at Airbnb is that as its community of guests and hosts grows, the company becomes more dependent upon data to stay connected with them - so understanding and responding to their needs effectively requires increasingly sophisticated methods. Every endeavor at Airbnb now has a cross-functional leadership team that includes a senior data scientist. The idea is to ensure that data influences strategy in the right way - and that projects begin with concrete goals and metrics, rather than tactics. Get the full story at