Which business practice did rockefeller repeatedly use that him succeed in building his oil monopoly?
a. in all his businesses, rockefeller made a profit and used it to expand or buy other businesses.
b. with every business rockefeller bought, he would learn about it, sell it at a profit, and buy another business.
c. with every purchase of a refinery, rockefeller would add new products to his business.
d. in all his businesses, rockefeller made sure that he controlled all aspects of production.

Mikkelson corporation's stock had a required return of 12.50% last year, when the risk-free rate was 3% and the market risk premium was 4.75%. then an increase in investor risk aversion caused the market risk premium to rise by 2%. the risk-free rate and the firm's beta remain unchanged. what is the company's new required rate of return? (hint: first calculate the beta, then find the required return.) do not round your intermediate calculations.

Many potential buyers value high-quality used cars at the full-information market price of € p1 and lemons at € p2. a limited number of potential sellers value high-quality cars at € v1 ≤ p1 and lemons at € v2 ≤ p2. everyone is risk neutral. the share of lemons among all the used cars that might be potentially sold is € θ . suppose that the buyers incur a transaction cost of $200 to purchase a car. this transaction cost is the value of their time to find a car. what is the equilibrium? is it possible that no cars are sold

What is a market? a. a system that allows people or companies to buy and sell products and services b. the number of companies willing to manufacture a specific product c. the ability to buy production materials in large quantities and save on costs d. a product's ability to satisfy a consumer