Most simply, the economic science only three axioms. First, the law of demand, and second, cost concept, the third is the meaning of competition.
Examples of the early seventies bill I put forward in the United States became famous in the West today. Hundred dollar bill on a piece of paper on the pavement will be missing infer economics foolproof. This phenomenon only economics can be inferred in advance or after the fact to explain in all sciences. Consider the following three points of it. First, the law of demand says that if there is no police presence, the greater the chance of missing the bill, because the pedestrian picked up price decline. Second, if a man has a beauty about it, could not wait, he picked up the intent of the bill dropped, because the opportunity cost is increased. Third, if pedestrians are more cases that appear to compete bills will rise - this is a competitive implications.
