The number of seats in a football stadium is fixed at 70,000. The city decides to impose a tax of $10 per ticket. In response, the team management raises the ticket price from $30 to $40 and still sells all 70,000 tickets. The tax caused a change in the consumer surplus of , a change in the producer surplus of , and a deadweight loss of .

After jeff bezos read about how the internet was growing by 2,000 percent a month, he set out to use the internet as a new distribution channel and founded amazon, which is now the world's largest online retailer. this is clearly an example of a(n)a. firm that uses closed innovation. b. entrepreneur who commercialized invention into an innovation. c. business that entered the industry during its maturity stage. d. exception to the long tail business model