Based on the financial report data from 2007 to 2014 reported by non-financial listing Corporations which listed on China's A shares, studying the impact the M&As' goodwill on the corporation performance and analyzing the regulation effects the acquirer’s property right played on the relationship between the goodwill and the company performance. We found that M&As' goodwill has significant effects on the performance of the combined party in current and lagged period, with no obvious correlation between the company's performance of the second, three or four and five period, but in the sixth period both have a significant negative correlation. Further studies have found that comparing with state-owned enterprises, the goodwill cost paid by the private listed enterprises has a bigger impact to improve the performance of the acquire.

On the basis of specifications to improve our carbon emissions constraints mechanism, making the appropriate improvements of the traditional performance evaluation index system. Increase carbon constraints performance indicators: the amount of carbon emissions trading, Carbon assets net profit margin, carbon-income ratio, the ratio of carbon costs, carbon assets turnover, unit profit of carbon emissions, CO2 emissions of Yuan output value, in order to fully assess the financial performance and non-financial performance, enable the enterprise performance evaluation system better and more responsive to the requirements of sustainable development, and more convincing.

The related concepts of energy saving are introduced in this article. There are four differences between energy saving trading and carbon emissions trading, which are the consideration, transaction subjects, focused problems and the realizing route. In addition, the accounting confirmation and measurement of enterprises’ energy saving trading are researched. As to the accounting confirmation, the enterprise energy saving can be divided into two parts, which are respectively as the intangible assets and tradable financial assets for parallel processing according to the proportion of R confirmed by the enterprise itself. Moreover, the accounting measurement of enterprises’ energy saving trading can be in accordance with the fair value.

Does an industry go to monopoly when there is no policy control? Supposing there are only a dominant firm and a competitive fringe in an industry with constant returns of scale, which play Stackelberg game, we analyze the industry concentration change if the dominant firm is permitted to acquire the competitive fringe. It is showed that the industry will be in monopoly if there is no investment, or not enough investment of the fringe.