Study on the effect financial flexibility status on the investment decisions of listed companies 并列题名：Study on the effect financial flexibility status on the investment decisions of listed companies Study on the effect of financial control of the parent company on the excessive leverage of the listed companies Research on the impact of government subsidy and market competition on the investment efficiency of listed companies Study on the reform of income tax system, tax shield values and financing decisions of listed companies Study on corporate financing constraint for R&D investments of Chinese listed companies 并列题名：Study on the effect of financial control of the parent company on the excessive leverage of the listed companies 并列题名：Research on the impact of government subsidy and market competition on the investment efficiency of listed companies Study on the influence of financialization of Chinese non-financial listed companies Study on the effect of the implementation of executive stock incentives by Chinese listed companies