Professor of Management Practice Myra Hart, Senior Lecturer Michael J. Roberts, and Research Associate Julia D. Stevens prepared this case. This case draws upon portions of an earlier case, “Zipcar,” HBS No. 802-085 (Boston: Harvard Business School Publishing, 2002), written by Professor Myra Hart and Research Associate Wendy Carter. HBS cases are developed solely as the basis for class discussion. Cases are not intended to serve as endorsements, sources of primary data, or illustrations of effective or ineffective management.