A natural monopoly is any market in which competition and entry are restricted by the granting of a public franchise, government license, patent, or copyright

Consider the relationship given by QCars = 100 + 4 × PCars - 2 × PSteel - 0.2 × PWorkers, where QCars is the quantity of cars supplied (in thousands), PCars is the price of cars (in thousands of dollars), PSteel is the price of steel, and PWorkers is the wage earned by autoworkers. If the price of steel is $10 per unit and the price of workers (the wage) is $20, what is the supply curve for cars?

A. QCars = 124 + 4 × PCars B. QCars = 100 + 4 × PCars - 2 × PSteel - .2 × PWorkers C. QCars = 100 + 4 × PCars D. QCars = 76 + 4 × PCar

In the long run, a year-long drought that destroys most of the summer's wheat crops causes permanently:

A. higher prices. B. lower prices. C. lower output. D. None of these is true.