Research on the effect of tax preference on technological innovation efficieny of enterprises 并列题名：Research on the effect of tax preference on technological innovation efficieny of enterprises Research on the effect of TMT's attention on disruptive technological innovation behavior of enterprises 并列题名：Research on the effect of TMT's attention on disruptive technological innovation behavior of enterprises Market oriented reform and technological innovation of Chinese enterprises Research on the impact of emission trading on green innovation of Chinese enterprises Research on the operating mechanism and performance of technological collaborative innovation in construction enterprises Research on the knowledge sharing mechanism based on technological innovation in enterprise cluster Research on the spillover effect of FDI on technological innovation in China Research on the governance effect of over-investment under the political connections of private enterprises