Everything has a price "-to get a fancy things, one must throw out a other things that I liked. In other words, the decision-making process requires a certain target was to achieve other goals. When people gather together back into society, they face many types of trade. However, the existing social need is balance fairness and effectiveness. The effectiveness is understood as we gained nothing from the rare natural resources. And fairness based on each person's rights be split evenly from general resources. Aware of the face with the trade-off of people not think with them know ahead what or what to do. Even so, be aware of the trade-off in life have important implications, because people can make decisions better when they understand the alternatives that they are.For example, a student stood before a decision to allocate your precious resource is time. He can devote full time to research subjects of Economics, or spend the whole time to the study of psychology, and either split time between the two disciplines. To have a school subject, he must give up an hour of study there. To take a class in one of two other subjects, he must give up an hour of play, concert or go to work to earn an income.
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