how to make body oil Central bankers' tasks are limited to keeping inflation stable and independence easier to maintain. Given this narrow mandate, the allocation of central bank decisions is limited. Moreover, it is easier to explain how the central bank's policy tools are linked to its political mandate. Some would say that the central bank's way of ensuring independence is to abandon macroprudential policies and micro-prudential policies and to take unconventional interventions in the securities market. But the crisis is an important lesson, macroeconomic and financial policies are closely connected, when the two tasks in the same institution, management by different commission, their coordination is the most effective. And because interest rates are low and uncertain, a crisis is coming, and unconventional policies will come back. A large bank of about 0.15 percentage points increased the prices they offered, but the challenger bank still had the best buy watches. If classical economists have interpreted the "market" as "laissez-faire", coase has answered the question of how to achieve "laissez-faire" or "price mechanism". The social profit generated by enterprise activities is the addition of economic profit or the external economic effect of the activity. Companies may make significant monetary profits, but external economic effects often result in negative results, and substantial social profits may be minimal. Such as the industrial revolution, the mass production of the factory is low cost and price of product, but in order to earn maximum profit, factory owners and lower production costs, lead to the low wages of child labor, as well as improper handling industrial waste or contaminants and other social burden.