what is profit margin The income from the transfer of equity investment and the income tax treatment of losses Value theory of the many contradictions and arguments, essentially derives from the different definitions of value, originated in the people for the different understanding of the concept of value, value, from the perspective of physics can put the theory of value based on the foundation of natural science, with a high degree of accuracy, objectivity and rationality, so that the value theory of widespread vagueness, subjectivity and ambiguity naturally are addressed. As social things all the movement and the change of value relation is in essence the motion and change, so the value theory is the foundation of social science theory, if the value theory is built on the basis of natural science, can greatly promote the fusion and unity of the social science and natural science, but also make the social science become subservient to the natural sciences. The German car market sold 3,697,290 new vehicles in 2011, down 1.9% from 2010, according to data released by the federal motor vehicle transport authority and the German automobile manufacturers association. The passenger car sold 3,173,634 vehicles, down 2.8%. In the context of the European debt crisis and the overall shrinking of the European market, the German car market has performed more smoothly than many expected in 2014. Compared with other developed countries in Europe, car sales in Germany are trending lower If classical economists have interpreted the "market" as "laissez-faire", coase has answered the question of how to achieve "laissez-faire" or "price mechanism". The investment in securities is conducive to improving the operation and management of enterprises, improving the economic and social visibility of enterprises and promoting the rationalization of enterprises' behaviors. The difference between the income and the total income has been realized Julie Palmer, a retail expert at Begbies Traynor, said retailers faced a particularly disappointing deal in the weeks following the apparent success of "black Friday" at the end of November.