eng Science and Education Publishing Journal of Finance and Economics 2328-7276 2021-05-25 9 2 73 76 10.12691/jfe-9-2-4 JFE2021924 article Guozhao Cao caoguozhao@sxu.edu.cn 1 Kaili Song 1 School of Economics and Management, Shanxi Univesity, Taiyuan, China Consider a supply chain consists of one supplier and two manufactures, we discuss the influence of manufacturer¡¯s technology sharing on supplier¡¯s technology investment decision, and the impact of equity holding on the first two by constructing a multi-stage game between a supplier and two manufacturers. The results show that when the investment cost is relatively high, the manufacturer will choose to open technology to induce supplier investment in open technology. Otherwise, it will choose to close technology to force the supplier investment in both technologies. We also find that when the spillover effect is small, the probability that the manufacturer choosing to open technology and the supplier investing in the open technology decreases first and then increases with the shareholding ratio. http://pubs.sciepub.com/jfe/9/2/4/jfe-9-2-4.pdf supply chain equity holding technology sharing supplier investment