Ten Principles of Economics How People Interact 5. Trade can make everyone better off 6. Markets are usually a good way to organize economic activity 7. Governments can sometimes improve economic outcomesHarcourt, Inc. items and derived items copyright © 2001 by Harcourt, Inc. Ten Principles of Economics How People Interact 5. Trade can make everyone better off. 6. Markets are usually a good way to organize economic activity. 7. Governments can sometimes improve economic outcomes