Mechanisms, Constraints and Optimization Paths of Subregional Economic Cooperation in Cross‑Border U

Subregional economic cooperation has emerged as a pivotal intermediate carrier connecting national macroeconomic strategies and urban micro‑level industrial development, filling the institutional and spatial gap between inter‑state full‑scale economic integration and individual urban autonomous development. Unlike large‑scale regional economic blocs dominated by national diplomatic negotiations, subregional economic cooperation focuses on geographically adjacent border areas, cross‑border urban clusters and contiguous territorial economic zones, relying on localized resource endowments and industrial complementarity to launch flexible, targeted economic and trade collaboration mechanisms. This decentralized, border‑oriented cooperation model effectively avoids the institutional rigidity and policy lag of macro‑national economic cooperation, while unlocking the developmental potential of marginal urban areas that are often excluded from core national economic layouts. In the context of global industrial restructuring and cross‑border factor flow liberalization, understanding the internal operating logic, practical bottlenecks and upgrade paths of subregional economic cooperation is critical to optimizing cross‑border urban agglomeration resource allocation, improving regional population and land carrying capacity, and realizing coordinated sustainable urban economic growth.
 

1. Theoretical Connotation and Operating Mechanism of Subregional Economic Cooperation

Subregional economic cooperation refers to small‑scale economic and trade collaboration initiated by geographically adjacent regional plates, border cities or cross‑border contiguous zones within a single continent, breaking through administrative boundary restrictions to realize cross‑regional flow and optimal allocation of production factors including land, labor, capital and technology. As a transitional form of regional economic integration, it differs fundamentally from national‑level free trade zones and multinational economic alliances in core attributes, spatial scope and operational logic. National‑level economic cooperation focuses on institutional docking of overall national industries and tariff policies, while subregional cooperation takes localized industrial complementarity and spatial proximity as the core foundation, with lower institutional threshold, more flexible implementation mechanisms and stronger regional pertinence.
The internal operating mechanism of subregional economic cooperation can be disassembled into three core dimensional logics: spatial proximity, factor complementarity and institutional decentralization. First, spatial proximity constitutes the geographical foundation of cooperation. Contiguous border regions and adjacent urban agglomerations share consistent traffic accessibility and similar resource endowment conditions, which greatly reduce the time cost and transaction cost of cross‑border factor flow. Unlike non‑adjacent cross‑regional cooperation, subregional cooperation can form continuous industrial spatial belts and integrated market systems, realizing scale effects of agglomeration economy in small‑scale regional spaces.

Second, factor complementarity is the core driving force for sustainable cooperation. Different border regions and marginal urban areas often form differentiated industrial structures due to differences in land resource reserves, population carrying capacity, labor cost and industrial foundation. Some regions have abundant land resources and low industrial land costs but lack technological innovation capabilities and high‑end industrial supporting facilities, while adjacent regions have mature manufacturing systems and technological research and development advantages but face land resource scarcity and excessive population agglomeration pressure. Subregional economic cooperation effectively bridges this resource mismatch gap, realizing cross‑regional optimal allocation of land factors, labor factors and industrial resources, and alleviating the structural imbalance of urban carrying capacity in single regions.

Third, institutional decentralization guarantees the flexibility of cooperation implementation. Subregional economic cooperation does not rely on unified national macro policy constraints, but allows local governments and regional market entities to independently formulate cooperation rules, industrial docking standards and benefit distribution mechanisms according to regional development realities. This decentralized institutional model can quickly respond to changes in regional market demand, avoid the one‑size‑fits‑all defect of macro national policies, and form a localized cooperation system that matches the actual development level of border urban agglomerations.
 

2. Practical Value of Subregional Economic Cooperation for Urban Agglomeration Development

From the perspective of urban economics and land resource allocation, subregional economic cooperation breaks the administrative boundary barriers that restrict the expansion of urban agglomeration economic benefits, and plays an irreplaceable role in optimizing regional urban layout, improving resource utilization efficiency and releasing marginal urban development potential. For a long time, the development of many border urban areas has been restricted by administrative segmentation, forming an obvious "marginalization dilemma". Core urban areas occupy superior policy resources, land resources and population resources, while border adjacent urban regions face insufficient industrial agglomeration, idle land resources and population outflow, resulting in serious spatial mismatch between urban land supply and industrial demand.

Subregional economic cooperation effectively solves this structural dilemma through cross‑border resource integration. First, it optimizes the regional land resource allocation system. Single border cities are limited by administrative jurisdiction, and their land development scale and industrial layout are constrained by local planning indicators, resulting in low‑efficiency land use or idle high‑quality land resources. Through subregional cooperation, multiple adjacent regions can jointly carry out overall land planning, break the restriction of single administrative land indicators, realize cross‑regional transfer and reuse of industrial land, residential land and ecological land, and maximize the economic output efficiency of unit land resources. This land integration model is particularly important for small and medium‑sized border cities with limited land carrying capacity, which can effectively expand their industrial development space without blind urban expansion.

Second, subregional cooperation balances the regional population carrying pressure. Excessive population agglomeration in core urban agglomerations often leads to problems such as rising land costs, traffic congestion and insufficient public service supply, while adjacent marginal urban areas have surplus public service resources and low population density. The cross‑border industrial docking and factor flow brought by subregional economic cooperation can guide industrial transfer and population diversion from core urban areas to marginal border areas, realize regional population rebalancing, reduce the overloading pressure of core urban carrying capacity, and activate the idle public service resources and demographic dividends of marginal cities.

Third, it promotes the iterative upgrading of regional industrial agglomeration economies. Relying on geographical proximity and factor complementarity, subregional cooperation can form specialized industrial division of labor among adjacent cities. Each region concentrates on developing advantageous industries according to its resource endowments, forming a complete industrial chain from raw material supply, processing and manufacturing to terminal sales and service support within the subregion. This localized industrial agglomeration avoids homogeneous industrial competition among adjacent cities, reduces regional industrial development internal friction, and builds a differentiated and coordinated industrial system with strong regional competitiveness.
 

3. Core Constraints and Root Causes of Current Subregional Economic Cooperation

Despite the prominent theoretical and practical value of subregional economic cooperation, many cross‑border subregional cooperation practices still face obvious development bottlenecks in actual operation, including institutional segmentation barriers, imperfect infrastructure docking, inconsistent industrial standards and unstable benefit distribution mechanisms. From the perspective of urban carrying capacity and land economic matching logic, these constraints are essentially derived from the mismatch between regional administrative management systems and market‑oriented factor allocation rules, as well as the lack of systematic overall planning for cross‑border urban resource integration.

The first core constraint is administrative boundary segmentation and institutional barrier solidification. Although subregional economic cooperation adopts a decentralized cooperation model, different regions and countries have independent administrative management systems, policy formulation standards and market supervision mechanisms. Border administrative boundaries not only restrict the free flow of land and labor factors, but also lead to differences in industrial access standards, tax policies and environmental supervision standards among adjacent regions. These institutional differences increase the transaction cost of cross‑regional industrial cooperation, hinder the integrated development of regional markets, and make it difficult to form unified industrial layout and resource allocation plans within the subregion. Many subregional cooperation projects are limited to simple commodity trade and labor flow, and cannot realize in‑depth integration of industrial chains, supply chains and innovation chains.

The second constraint is the imperfection of cross‑border infrastructure interconnection system. Efficient transportation, energy and information infrastructure is the physical foundation of subregional factor flow and industrial cooperation. At present, many cross‑border subregional regions have prominent infrastructure docking problems, including missing cross‑border road and rail sections, bottleneck traffic passages, unconnected cross‑border power and oil and gas transmission pipelines, and asynchronous information communication channels. These infrastructure defects directly restrict the efficiency of cross‑border factor circulation, increase the logistics and operation costs of regional industrial cooperation, and make it difficult to form continuous spatial industrial agglomeration advantages. Unlike core urban agglomerations with perfect infrastructure, border subregions lack long‑term unified infrastructure planning, resulting in fragmented infrastructure construction and low overall service efficiency.

The third constraint is the imbalance of regional resource endowments and benefit distribution mechanisms. There are obvious differences in economic development level, industrial foundation and resource reserves among different regions participating in subregional cooperation. Core border cities have stronger industrial innovation capabilities and market radiation capabilities, while marginal border regions are mainly dependent on resource‑based industries and primary processing industries. In the absence of a scientific benefit distribution and compensation mechanism, high‑value industrial links and economic benefits are often concentrated in core regions, while marginal regions bear the cost of land development and ecological protection, resulting in uneven regional development. This unbalanced benefit pattern reduces the cooperation enthusiasm of marginal regions, triggers homogeneous competition and resource plundering among regions, and restricts the long‑term sustainable operation of subregional economic cooperation.

The fourth constraint is the lack of systematic overall planning for urban carrying capacity matching. Many subregional cooperation practices focus excessively on short‑term industrial project docking and economic benefit growth, ignoring the matching of regional land resource carrying capacity, population bearing scale and ecological environmental capacity. Blind introduction of industrial projects and expansion of cooperation scale in some subregions lead to excessive consumption of land resources, overloading of regional ecological environment and unbalanced population distribution, which not only fails to realize high‑quality regional development, but also triggers hidden dangers of urban carrying capacity overload and restricts the long‑term iterative development of subregional cooperation.
 

4. Targeted Optimization Paths for High‑Quality Subregional Economic Cooperation

Based on the root cause analysis of subregional cooperation constraints, combined with the core logic of urban agglomeration resource allocation and carrying capacity optimization, the high‑quality development of subregional economic cooperation needs to start from institutional innovation, infrastructure integration, benefit mechanism improvement and carrying capacity matching planning, to build a coordinated, efficient and sustainable regional cooperation system.

First, break administrative institutional barriers and build a unified localized cooperation mechanism. Adhere to the decentralized and flexible advantages of subregional cooperation, and establish cross‑border regional joint working groups composed of local governments, market enterprises and industry associations. The working groups are responsible for unifying regional industrial access standards, market supervision rules and tax docking policies, eliminating institutional differences caused by administrative segmentation. For cross‑border industrial cooperation, formulate unified regional development plans, clarify the industrial positioning and development orientation of each region, avoid homogeneous competition, and form a differentiated industrial division of labor pattern. At the same time, establish a normalized policy communication and coordination mechanism to dynamically adjust cooperation rules according to regional market changes and industrial development needs, and improve the flexibility and adaptability of subregional cooperation.

Second, accelerate cross‑border infrastructure interconnection and build a three‑dimensional factor circulation channel. Focus on the key bottlenecks restricting regional factor flow, systematically promote the construction and upgrading of cross‑border transportation, energy and information infrastructure. Make up for the missing sections of cross‑border highways and railways, renovate bottleneck traffic passages, and build smooth cross‑border logistics and transportation corridors. Steadily promote the construction of cross‑border oil and gas pipelines, power transmission channels and optical cable communication facilities to realize the interconnection and sharing of regional energy and information resources. Relying on unified infrastructure planning, build an integrated regional infrastructure network, reduce cross‑regional factor transaction costs, and lay a physical foundation for in‑depth industrial cooperation and resource optimal allocation.

Third, improve the regional benefit distribution and compensation mechanism to balance regional development differences. Based on the principle of complementary advantages and win‑win cooperation, build a scientific benefit sharing and ecological compensation system suitable for subregional development characteristics. For core regions with strong industrial radiation capacity, establish a industrial feedback mechanism to drive the upgrading of primary industries and supporting industries in marginal regions. For marginal regions that undertake land development and ecological protection tasks, set up special compensation funds to make up for their development costs. Form a regional cooperation pattern of "core leadership, marginal support, complementary advantages and shared benefits", fully mobilize the cooperation initiative of all participating regions, and realize coordinated and balanced regional economic development.

Fourth, take urban carrying capacity as the bottom line to realize sustainable cooperative development. Incorporate land resource endowments, population carrying scale and ecological environmental capacity of subregional regions into the overall cooperation planning system. Strictly control the scale of industrial development and land development according to regional carrying capacity constraints, avoid blind industrial expansion and excessive resource consumption. Optimize the spatial layout of urban land, realize the coordinated allocation of industrial land, residential land and ecological land in the subregion, and balance the relationship between economic development and ecological protection. Guide industrial projects with high technological content, low resource consumption and high added value to settle in the region, promote the iterative upgrading of regional industrial structure, and realize the organic unity of subregional economic growth and urban carrying capacity sustainable development.
 

5. Future Development Trend of Subregional Economic Cooperation

With the continuous deepening of global industrial digitization and regional economic integration, subregional economic cooperation will show three obvious development trends in the future: refined industrial division of labor, digitalized cooperation mode and green low‑carbon development orientation. First, the regional industrial division of labor will be further refined. With the improvement of subregional cooperation mechanisms and infrastructure, the industrial connection among adjacent regions will change from simple product trade to deep integration of industrial chains, innovation chains and supply chains, forming a more specialized and refined regional industrial cooperation system.

Second, digital technology will reshape the subregional cooperation model. Digital economy, cross‑border e‑commerce and intelligent logistics will break the traditional spatial restrictions of subregional cooperation, realize real‑time docking of regional market information, precise matching of industrial resources and efficient circulation of factor resources. Digitalized supervision and intelligent management will further reduce the institutional transaction costs of regional cooperation and improve the overall operational efficiency of subregional economic systems.

Third, green low‑carbon development will become the core benchmark of subregional cooperation. Under the global ecological governance and sustainable development background, future subregional economic cooperation will no longer simply pursue economic growth rate, but take ecological environmental protection and resource efficient utilization as important evaluation indicators. All regions will carry out industrial cooperation and resource integration on the premise of meeting ecological carrying capacity constraints, and build a green, low‑carbon and sustainable subregional economic development system.

In general, subregional economic cooperation, as a flexible and efficient regional economic integration model, effectively makes up for the deficiencies of macro national economic cooperation and single urban independent development. By breaking administrative barriers, integrating regional resources, optimizing industrial layout and balancing carrying capacity constraints, it can effectively release the development potential of border urban agglomerations and promote coordinated high‑quality development of regional economies. In the future, continuous institutional innovation, infrastructure improvement and carrying capacity optimization will further enhance the core competitiveness of subregional economic cooperation, making it an important driving force for global regional economic integration and urban agglomeration upgrading.

Reference Block Source Reference Link: https://wiki.mbalib.com/wiki/次区域经济合作

Link Brief: It defines subregional economic cooperation as small‑scale economic and trade collaboration among adjacent geographical plates, border countries and frontier areas within a continent, serving as the core theoretical basis for this article’s research framework.

Content Disclaimer This article is for general reference only and does not constitute professional R&D guidance, production process advice or quality certification. All material performance data has specific test premises; readers should verify parameters against actual equipment and working conditions.