Economists define investment to include: Question 21 options: any increase in business inventories the addition of cash to a savings account the purchase of common or preferred stock the purchase of any durable good the purchase of any non-durable goodIn the small university town of Academicus the municipal government only provides 25 licences (one per car) to operate taxi services in the city. Three companies own all of the licenses and each of them are worth about $1 million. Which of the following market structures most closely approximates the nature of her business? Question 22 options: perfect competition a monopoly an oligopoly monopolistic competition competitive monopoly