> There is no barrier to entry in ride sharing. Drivers can install multiple hailing apps. Riders can too. This is not true. There are big network effects when

> There is no barrier to entry in ride sharing. Drivers can install multiple hailing apps. Riders can too. This is not true. There are big network effects when you consider products like UberPOOL. A new app would burn through a lot of cash to subsidize rates below the rates Uber can offer profitably through pooling.