The United States has been the largest exporter of corn for over 40 years. How can Economics and comparative advantage explain this?
1) Other countries have no use for corn since they produce other foods.
2) The U.S. produces corn because it sells at a higher price than other goods.
3) The U.S. has a large amount of land input, and this resource endowment gives the U.S. a comparative advantage in producing goods which require a lot of land to produce
4) The U.S. has the comparative advantage in corn production because labor in cheaper in the U.S. compared to other countries.