profitability business simulations It doesn't seem to be too much of a market to really focus on learning or learning about the importance of learning. More and more, I feel that learning is to keep to the only way to do it for a long time in the market, continuous learning can bring something new to you constantly, in a sense, the ability of learning will be able to represent your trading ability and analysis ability. His European central bank held interest rates unchanged and signaled that it would maintain its aggressive currency, despite data showing strong economic performance in the region. Interest determines the regularity of prescriptive (interest this qualitative rules will determine the amount of the rules), the amount of interest depends on profit, interest rate depends on the average profit margin. Marx further pointed out that, between average profit margin and zero, interest rate depends on two factors: one is profit margin; The second is the proportion of total profits allocated between lenders and borrowers. As hicks income concept did not specify what is called "equal wealth", and thus the income concept formed the basis of many debates concept, and the theory of accounting earnings, especially the capital preservation theory has a great influence. In accounting, people used to call "maintaining the same level of affluence" as capital preservation.