1. Why are there only two freight railway companies in Canada (CN and CP)?

2.Airlines outsource groundhandling services at some airports (that its, they rely on

independent, third-party providers of these services) and use their own groundhandling units

at other airports (that is, they internalize these services). Why?

3. How should a company that hires any of the following - ad agencies, management

consultants, investment banks - pay them? Why would the firms hired be reluctant to accept

any form of payment other than a fixed fee?

(Even if you know one question, that would help. Thank You!!)