Marsha has been keeping track of the effectiveness of her advertising campaigns. She is probably using all but which of the following tools?

How does your household gain from specialization and comparative advantage? (what is produced, what is not produced yet paid to a specialist to produce? )

Amarket that consists of all possible consumers regardless of their specific needs or wants is a

Suppose an investor starts with a portfolio consisting of one randomly selected stock. as more and more randomly selected stocks are added to the portfolio, what happens to the portfolio's risk