交易成本节约：中国式统一大市场的政策逻辑

Group 1 - The core idea is that a unified national market is essential for China's modernization, helping to unlock the "scale but not economy" issues within the domestic economic cycle and enhancing international competitiveness through local market effects [1][2] - The concept of transaction costs is crucial for understanding the dynamics of the unified market, as it highlights the administrative divisions caused by local protectionism and the natural segmentation due to transportation costs [3][4] - The transition from a planned economy to a market economy has shifted local government roles, leading to increased transaction costs in upstream factor markets, necessitating a focus on reducing these costs in the construction of a unified market [6][7] Group 2 - Historical context shows that local protectionism has historically raised transaction costs, with various government policies attempting to mitigate market segmentation, but with limited success [7][8] - The relationship between market segmentation and economic growth follows an inverted U-shape, indicating that as the economy matures, the importance of domestic markets increases, necessitating the optimization of factor allocation [8][9] - The role of entrepreneurs is emphasized as they drive the efficient use of resources, and a unified market system can help reduce institutional transaction costs, fostering innovation and economic growth [10][11] Group 3 - Future reforms should focus on establishing unified foundational institutional rules to lower transaction costs, particularly in factor markets, while adjusting the relationship between central and local governments [11][12] - Market-oriented reforms are needed to standardize policies across regions, particularly in land and labor markets, to prevent local governments from offering excessive incentives that distort competition [12][13] - Enhancing transparency and fairness in the execution of foundational rules is essential, including the establishment of mechanisms for information sharing and feedback between regulatory bodies and market participants [12][13]