Although an enterprise's internal trade fair eliminates or reduces some of the market transaction costs, it also brings with it the specific transaction costs of the enterprise. The main reason for this defect is also the incompleteness of information. Specifically, first, there are various contractual relationships among enterprises, including contractual relationship between enterprises and workers, contractual relationship between enterprises and managers, etc. The enterprise should supervise the work of the workers and products that it employs, as well as the managers and other personnel, and induces them to work hard for the enterprise. So, companies are signing contracts and spending on oversight and incentives. Secondly, on the one hand, corporate decision makers often need to obtain information from subordinates. On the other hand, the decision-making information of the upper level of the enterprise should be realized by passing it to the subordinate. The information transmission of these two different directions will be distorted by the increase of subordination of enterprise scale, resulting in the loss of enterprise efficiency. Once again, the subordinate of the enterprise often conceals or passes the wrong information to the superior for selfish motives, so that the superior can make decisions that benefit the subordinate. Or, the subordinate's decision to the superior only passes or executes the part that is advantageous to oneself. These will result in the loss of enterprise efficiency. Thus, the expansion of enterprises is limited. According to coase's theory, the scale of the enterprise should be expanded to this point, that is at this point to increase the cost of an internal exchange cost equals the cost through the market exchange cost and so on. Of course, in addition to the interest rate cut, yu 'ebao has also lowered the limit of personal accounts, from 1 million yuan to 250,000 yuan, to 100 thousand yuan. In recent days, it has been announced that yu 'ebao's one-day purchase quota will be adjusted to 20,000 yuan, all of which are aimed at reducing risks. Generally speaking, the interest rate varies according to the term of measurement, indicating that the method has annual interest rate, monthly interest rate and daily interest rate. Savers can see "good products" from these emerging Banks next year, especially in the long-term fixed bond market, says Rachel Springall of Moneyfacts. It looks like a big box and has doors and Windows, which people call "box cars". It is named "sedan" in the catalog because it looks like the "sedan chair" of the European ladies used for travel and other occasions. We have been using internet banking for quiet sometimes now. Even though there were internet banking security breach occasions, but the percentage is extremely small. People has learned to be very careful and protecting themselves when working with internet banking. Internet banking users are smart people and they discover how to protect their computer from malware and hacker containing the opportunity to interrupt within their internet bank-account. 1. Enterprise income tax