Figure 4: Continuation Rate for U.S. Driver-Partners Over Two Years Note: Figure based on U.S. UberBLACK and uberX driver-partners who made their first trip between January and June of 2013 and had subsequently made at least four trips (11,267 individuals). A driver- partner is classified as becoming inactive at the start of any period in which he or she does not record a trip for the next six (or more) months. Within a month of becoming an active Uber driver-partner, 11 percent of driver-partners became inactive, defined as not using the service over the next 6 months. After half a year, 70 percent of those who started using Uber in the first half of 2013 were still actively using the system, and more than half of those who started in the first half of 2013 remained active a year after starting. A third were still active two years after starting on the platform. These figures suggest that Uber provides a bridge for many who are seeking another position in the labor market, and it provides a longer-term option for others. Uber’s driver-partners can select into providing different types of car service. The Uber platform offers several tiered service levels to potential riders. Roughly speaking, throughout the United States, UberBLACK is the premium option. Driver-partners on UberBLACK are commercially licensed drivers with “black cars” that adhere to specific vehicle standards. Many driver-partners on UberBLACK are employees or contract 18