Yu, Mingchuan, Yujie Lu, Chao Li, Han Lin, and Philip Shapira. “More Is Less? The Curvilinear Effects of Political Ties on Corporate Innovation Performance”. Technological and Economic Development of Economy 25, no. 6 (November 15, 2019): 1309-1335. Accessed March 29, 2024. https://journals.vilniustech.lt/index.php/TEDE/article/view/10718.