The J-curve summarizes the phenomenon that occurs when import spending initially falls after a depreciation of a country's currency and then import spending later rises

If people voluntarily bring their recyclable materials to a recycling center, these materials reduce landfill space, reduce the need for virgin material extraction, and provide an inexpensive input in many production processes. This results in

a. an increase in the externalities associated with producing goods b. mandatory recycling c. an increase in private costs of producing goods d. a narrowing of the gap between private and social costs of producing goods

In an hour Jane can solder 50 connections or inspect 20 parts while Jim can solder 25 connections or inspect 20 parts in an hour

A) Jane has a comparative advantage over Jim in both soldering and inspecting. B) Jane has a comparative advantage over Jim in soldering while Jim has a comparative advantage in inspecting. C) Jim has a comparative advantage over Jane in soldering while Jane has a comparative advantage in inspecting. D) Jim had a comparative advantage over Jane in both soldering and inspecting.