Assumption in trade absolute advantage comparative advantage specialization in trade Country A produces a certain good in abundance and sells it at a cheaper rate to other countries. arrowRight Country B produces a good with a lower opportunity cost than another good. arrowRight Country A has superior resources to produce a good more efficiently. arrowRight Countries A and B have a free flow of labor across their borders.

answer; researchers typically cannot control people's sexual behaviors as would be necessary in an experiment;

one way archaeology us understand the past is through the material objects it finds, allowing us to know what was being used, and when. for example a dig recently found a flute, believed to be the oldest musical instrument found to date.

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the technology changed agriculture in an impacting manner since many people left the field work by a cellular or other technological appliances