We all know that individuals could use even more exercise. As a society, were entirely too sedentary, spending considerable time watching TV, online video video games and surfing the net - and far inadequate engaged in exercising. This kind of lifestyle leads to obesity and low stamina. We all are aware of this - but whatever you may well not know is 'abnormal' amounts of physical activity means reduced cognitive abilities as well! As you get older, the gap grows more plus much more apparent. In the face of market failure, coase has given the opposite answer: external-utility problems can be solved by explicitly using the market, without government intervention. And zhang wuchang is more absolute, he said that there is no so-called external utility, there is only unclear property rights. Anyway, coase brought revolutionary innovation to market concepts. He made it clear that the key to the market was not the "price mechanism" of impersonal machinery, but the power of participants in economic activity. So why is yu 'e bao falling steadily? Keynes argued that savings and investment were two interdependent variables, not two independent variables.