= Giving money back to investors.

Explanation:

With all investors, you need to determine how they should be repaid. ... They can be repaid on a “straight schedule” (for investors who are providing loans instead of buying equity in your company), they can be paid back based upon their percentage of ownership, or they can be paid back at a “preferred rate” of return.

in terms of experimental research, mcdonald’s charging different prices in the two cities relates to