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DISTINGUISHING GAINS FROM SPECIALIZATION AND GAINS FROM EXCHANGE: AN ANALYSIS OF THE DIFFERENCES IN WTO ACCESSION BENEFITS BETWEEN CHINA AND THE UNITED STATES AND AN EXPLANATION OF CHINA'S INTERNATIONAL SUCCESS

Jun Dang

School of Economics and Finance, Xian international Studies University,

Xian, China, 710128

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Abstract

This paper takes the classical theoretical distinction between Gains from Specialization and Gains from (Exchange) Trade as its core analytical framework. Against the backdrop of global value chain (GVC) division of labor, it redefines the sources, structure, transmission mechanisms, and measurement methods of international trade gains. It systematically compares the differences in trade gain models, distribution structures, realization paths, and policy effects between China and the United States under the WTO framework. The study finds that China's international success since its WTO accession is essentially a dual gain superposition and dynamic upgrading dominated by gains from specialization and supported by gains from exchange. Relying on a complete industrial system, large - scale factor allocation efficiency, continuous institutional opening - up, and technology absorption and innovation, China has achieved export scale expansion, industrial structure upgrading, GVC climbing, and sustained improvement of total factor productivity. The United States has formed a gain structure with division gains from high - end service industry  +  exchange gains from the US dollar system as its core. The traditional merchandise trade deficit indicator seriously underestimates its real trade gains, while recent unilateral tariffs and protectionist policies have significantly eroded its long - term accumulated division gains and exchange dividends.

This paper further constructs a three - dimensional measurement framework of cost - productivity - quality, using authoritative data from WTO - TiVA, China Customs, the National Bureau of Statistics, and UNCTAD to systematically measure the unit output cost, labor productivity, total factor productivity, export domestic value - added rate, product technical complexity, and quality index in China's industrial structure adjustment from 2001 to 2025. The results show that since its WTO accession, China's manufacturing unit cost has continued to decline, labor productivity has grown at an average annual rate of over 8%, and export product quality and technical complexity have increased by more than 120%, forming a virtuous cycle of "low - cost advantage  -  high - efficiency production  -  high - quality supply." This is the micro - foundation for China to continuously expand division gains, optimize exchange gains, and achieve sustainable international success.

The research shows that China's international success is not a simple expansion based on low factor costs, but the result of the dynamic release of comparative advantages, continuous deepening of institutional reform, technology spillover from foreign investment, improvement of the multilateral trading environment, and proactive adjustment of national development strategies. The conclusions clarify the real sources of international trade gains, refute the one - sided view of judging trade gains or losses by trade balance, and provide theoretical support and empirical evidence for understanding China's development path after WTO accession, promoting high - quality development of foreign trade in the new era, and coping with changes in the global economic and trade pattern.

Keywords: Gains from Specialization; Gains from Exchange; Global Value Chain; Sino - US Trade Gains; Industrial Structure Adjustment; Productivity Improvement; Product Quality; WTO