The dollar appreciates when U.S. demands for foreign currencies decrease

Janet calculated the GDP growth rates for France between 2012 and 2013. Using 2012 prices for both years, GDP increased 5 percent. Using 2013 prices for both years, GDP increased 1 percent

Hence the chained-price method will calculate that between these years, real GDP increased by A) 3 percent. B) 4 percent. C) 1 percent. D) 5 percent. E) 6 percent.

The optimal amount of air pollution is

A) found by equating the marginal benefits from reducing pollution by one more unit with the marginal costs of reducing pollution by an additional unit. B) found by equating the total benefits from reducing pollution by one more unit with the total costs of reducing pollution by an additional unit. C) found by setting the marginal benefits from reducing pollution by one more unit equal to zero. D) a meaningless concept since we cannot monetize the environment.