oil for lawnmower First of all, it costs transaction cost for the manufacturer to purchase intermediate products in the market. It includes the cost of seeking suitable suppliers, signing contracts and supervising contract execution. If the manufacturer can produce some intermediate products within the enterprise itself, it can eliminate or reduce some transaction costs, and can better guarantee the quality of the products. Second, if the manufacturers need is a special type of specialized equipment, the supplier does not generally willing to specialize in only a buyer of the product of the investment and production, because this kind of proprietary investment risk is bigger. Therefore, vendors that need this specialized device need to solve the problem of specialized devices within the enterprise. In the end, the manufacturers hire employees with specialized skills, such as specialized product design, cost management, and quality control, and establish long-term contractual relationships with them. This can be more beneficial than buying the corresponding services from other vendors, thereby eliminating or reducing the corresponding transaction costs. Subconsciously creating space to create diversity and inclusiveness - we have just entered the era of blockchain and are still working on this technology. The creators in this field are younger and mostly white men. This is not conducive to creating an attractive environment for more diverse people, and diversity is needed to develop powerful global products. This two days of U.S. stocks in the capital market, there was a dark horse, the named Longfin company, in just two days, rose more than 2000%, and due to rise too fast, multiple trigger exchange circuit breakers. It is understood that the company is mainly engaged in the use of artificial intelligence technology to provide financial services. Longfin (NASDAQ: LFIN), which was founded in February, has been trading on the NASDAQ stock exchange since last week at $5 a share, a very young start-up. Keynes argued that savings and investment were two interdependent variables, not two independent variables. Interest rates in different countries have different connotations. In China, interest rates typically refer to bank interest rates, further pointing to the pboc's benchmark deposit and lending rates. In the United States, mainly refers to the bond market interest rates, the fed adjustment of benchmark interest rate, also not have mandatory administrative benchmark interest rates, but through open market operations after determine its rate for overnight loans between Banks.