Ren, Y. 2026. The Impact of Institutional Opening-up on the Development of New-Quality Productivity in Enterprises: A Quasi-Natural Experiment Based on Cross-Border E-commerce Pilot Zones. Journal of Global Economy, Business and Finance. 8, 9 (Sep. 2026), 13–21. DOI:https://doi.org/10.66069/ojspub.214122904.