长三角区域经济一体化上升为国家战略，实施高质量一体化发展要求的提出，既是长三角一体化所处发展阶段的升级需求，也是对当前国际严峻挑战和形势变化的一种积极应对。本报告采用价格法估算长三角区域经济一体化指数，指数在波动中下降，相应地，长三角区域内各个地区间的经济联系亦呈现鲜明的阶段性特征，表明区域间经济融合不断深入。建议通过机制创新、产业结构优化、发展开放型经济来促进长三角区域高质量一体化发展。
It is not only upgrading needs of Yangtze River Delta region （YRD） at the development stage but also a positive response to the current international severe challenges and changes in the situation that regional integration in the YRD has become a national strategy with high-quality integration development. The price method is used to estimate the regional economic integration index of the YRD. The integration index is declining in the fluctuation. Accordingly，the economic relations among different regions in the YRD also show distinct stage characteristics，indicating that the regional economic integration is enlarging and deepening. It is suggested topromote the high-quality of economic growth of YRD，by mechanism innovation，industrial structure optimization and development of open economy.
