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Since the MM theory has been proposed , capital structure research has been a hot topic of modern financial theory , scholars for capital structure research focuses on the impact of factors on capital structure and capital structure of the economic effect that the capital structure of the enterprise value of the company performance explore the role of these two areas , the resulting conclusions are not identical, but is recognized by most scholars capital structure in different industries there is a difference , for the capital structure research can not be generalized , so more and more scholars sector and to study the capital structure , look abroad study found , the appliance industry and the real estate industry has been the focus of scholars , and construction machinery industry is less capital structure research , therefore , I consider that the capital structure of the construction machinery industry still has a certain depth research space and theoretical significance . This paper first describes the project 's research background and significance , research papers and research methods , innovation of this paper , and yet perfect, and capital structure theory and literature review were reviewed . Subsequently, the use of financial data on the construction machinery industry, capital structure and profitability status quo for a more detailed analysis to identify the construction machinery industry capital structure of listed companies in the characteristics and problems . Again , the use of statistical software on capital structure and profitability of the relationship between the empirical analysis , in which the selection of indicators for the capital structure , both using a gearing ratio of common indicators , but also combines characteristics of the construction machinery industry capital structure , the choice of other liabilities indicator for the evaluation of profitability , using a principal component analysis method to eliminate the profitability indicators exist between the various collinearity issues, and the profitability of comprehensive evaluation score to the capital structure indicators as independent variables to profitability composite score as the dependent variable , building the relational model of data into statistical software for regression analysis .
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