Based on the Case:Hart, M., Roberts, M., & Stevens, J. (2003). Zipcar: Refining the Business Model, Harvard Business School,

Could you answer below questions:

1) What is Zipcar's business model, and how has it changed between December 1999 and May 2000?

2) What do the data from actual operations in September say about how the business model is playing out in practice?

3) Does this data give you comfort or concern? Why or why not?