Macroeconomics' need for government intervention ' Market is generally believed that tax reform important progress and good economic data pushed up investor optimism about the U.S. economy growth, coupled with a near record levels of long positions covering, some traders selling positions betting on further flattening of the yield curve, lead to long-term Treasury yields climbed sharply this week. Why? Independence is more difficult in an age when cross-border spillovers of national monetary policy become powerful. These spillover effects make central Banks consider the impact of their policies on foreign and global systems. But it is difficult to pursue global goals when the central bank operates under the narrow, centralized mandate of its independence, and is close to impossible. Under the theoretical framework of the theory, the theory of commodity market equilibrium and the monetary market equilibrium of Keynesian theory are unified. Marx's theory of interest rate decisions from the perspective of the source and essence of interest, taking into account the institutional factors in the role of interest rate decisions of interest theory, its theoretical core is the interest rate is determined by the average profit margin. Marx believed that under capitalism, interest is a part of profit and a form of conversion of surplus value. The accounting income maintains the financial capital preservation, namely, the monetary value that only requires the owner to invest is not eroded, the enterprise income exceeds the input value part is the accounting income. Accounting focuses on reporting financial results. The economic benefits insist on physical capital preservation, which can only be confirmed when the actual production capacity of the owner is saved. It is believed that only by maintaining the actual production capacity of the enterprise can the enterprise reproduce smoothly. Physical capital preservation is more meaningful than the income of financial capital preservation, but it is difficult to measure. There are many things you plus your children are capable of doing over a rainy day. For instance you might watch T.V. Or you might take action that might be more educational for you and your children. You along with your children are capable of doing a science project. You are probably wondering the reason why you may want to perform a science project. Here are 5 reasons science projects are wonderful activities for rainy days.