Gary buys a house for $200,000 using $10,000 of his own money and gets a mortgage for the remaining $190,000 . If the value of the house increases 7%, what will be the percentage increase in Gary's investment?

To alleviate the commons problem, the government can

A) apply a tax. B) set a quota. C) assign property rights. D) All of the above.

John raises bees to pollinate his orchard. A couple of bees which escaped ended up pollinating his neighbor's orchard, so

A) John's neighbor has received an internal cost of John's bee-keeping. B) John's neighbor has received an external cost of John's bee-keeping. C) John's neighbor has received an external benefit of John's bee-keeping. D) None of the above is correct.