At the beginning of 2018, the Shades of Gray Company has 8,000 pairs of sunglasses in stock. During 2018, the company produces 120,000 pairs of sunglasses and sells 112,000 pairs of sunglasses. The Shades of Gray Company's stock of inventory at the end of 2017 is ________ pairs of sunglasses.

Because of the slope of the aggregate demand curve, we can say that

A) a decrease in the price level leads to a lower level of real GDP demanded. B) an increase in the price level leads to a higher level of real GDP demanded. C) a decrease in the price level leads to a higher level of real GDP demanded. D) an increase in the price level leads to no change in the level of real GDP demanded.

Which of the following policies address the the problem posed by positive externalities?

A) a subsidy to the agent that generates the positive externality B) a tax on the agent that generates the positive externality C) limit the activity that generates the positive externality D) a subsidy to the agents that benefit from the positive externality