Economic profits in perfect competition and monopolistic competition market has a special purpose, a positive profit can attract more enterprises to enter the market, increasing competition and push the market equilibrium price low, exclude some enterprises lack of competitiveness in the market, to achieve long-term equilibrium; On the contrary, negative economic profit can eliminate some of the original enterprises in the market, because the supply is reduced, the market equilibrium price will be pushed up, and the long-term equilibrium will be achieved. The result of the two cases is that economic profits disappear from each manufacturer and the manufacturer's total income is at the lowest point of average cost. In addition to the formal "perfect" in the new classical market concept, the new classical theory has not added new meaning to the classical theory. That is to say, under the new classical "perfect" mathematical model under the skin, it is still classical free laissez-faire order, "new" is "new" in the form. And the form of depth at the expense of perfect at the expense of the thoughts, general equilibrium model of fine arbitrarily abstract away the activities of the "personal pursuit to satisfy desires to promote social welfare" logic support. This year, ms lagarde said there was a marked slowdown in activity and the UK's recent performance was In the late 20th century, in the context of China's reform and opening up and modernization, and the influx of new concepts in the field of information technology, the meaning of "enterprise" changed. On the one hand, a large number of "enterprises" have emerged in the non-planned economy. On the other hand, in some new concepts, the meaning is not limited to commercial or for-profit organizations, which are currently mainly derived from the translation of the word "enterprise" in English. Therefore, the word "enterprise" appears in public media in two ways: (1) the equity of enterprises in general (including the transfer of shares, or shares, buy and sell, should according to the state administration of taxation on several tax equity investment business issues notice "(guoshuifa (2000) no. 118) the relevant provisions. Where the equity transferor should share the accumulated undistributed profit or accumulated surplus accumulation fund of the investor, the income derived from the transfer of equity shall not be recognized as the income derived from the nature of the dividend. On Wednesday, on the first four shopping days of Christmas, upscale stores were discounting heavily, including most of the fashion retailers. H&M offers discounts of up to 60%, while Debenhams, Fraser, French connections, gaps, new faces and Dorothy Perkins offer discounts of up to 50%.