Announced on the UK economy in the international monetary fund annual health check results, published in the Treasury's speech, ms lagarde hit back at the recession after the referendum criticism at the upcoming future fund. In 1934, professor rei, of the center for fluid mechanics, used model cars to measure the aerodynamic drag of various bodies in wind tunnels Western economists further point out that the main factor that leads to the difference between trading costs in markets and businesses is the incompleteness of information. Because of the incompleteness of the information. Any party of a contract will be trying to collect, information and access to what they didn't have to monitor each other's behavior, and try to constraints, and afterwards to punish in advance of each other's default behavior and so on. All these practices produce transaction costs. As a result of these practices in the market and the enterprise can take different forms, so the corresponding transaction costs is not the same, in particular, under the condition of asymmetric information, in the process of market transactions, transaction cost, as a result of these practices are often very high. Therefore, through the organizational form of enterprises, some market transactions can be internalized to eliminate or reduce the high transaction costs generated by some market exchanges. The earliest efforts were made in the areas of canning, Alexandria, munez and spaurous. Philip Hammond has been trying to persuade conservatives that tax increases and spending cuts are needed to reduce the deficit. Ipsos Retail Performance, a consultancy, said retailers were fighting for business after the number of shoppers on high street fell by almost 10% in the first three weeks of December. On Sunday, December 10th, a 21% decline in the British national snow.