Research on the theory of necessity-driven entrepreneurship 并列题名：Research on the theory of necessity-driven entrepreneurship Research on the external support system of university students' entrepreneurship 并列题名：Research on the external support system of university students' entrepreneurship Microtheory of innovative entrepreneurship Research on the human resource integration in M&A intrapreneurship 并列题名：Microtheory of innovative entrepreneurship a history of green entrepreneurship General theory of entrepreneurship Research on the influence of social capltal on farmer·technological entrepreneurship