What have been the major causes of the large U.S. trade deficits since 1999? What are the major benefits and costs associated with trade deficits? Explain: “A trade deficit means that a nation is...

What have been the major causes of the large U.S. trade deficits since 1999? What are the major benefits and costs associated with trade deficits? Explain: “A trade deficit means that a nation is receiving more goods and services from abroad than it is sending abroad.” How can that be called “unfavorable”?