Lanbiao Liu, Wanrong Deng
2026, 5(3): 171-200.
The cross-border division of production generates gains from specialization but also allows trade restrictions on specific products to propagate downstream through input-output linkages. Unlike final consumption goods,intermediate goods are used in subsequent production processes. Restrictions on imports of these goods therefore affect procurement costs and may alter firms' production arrangements and the allocation of production activities across countries. Anti-dumping measures are intended to provide relief to domestic industries injured by dumped imports,yet protection measures targeting intermediate goods can tighten input constraints for downstream firms. China's manufacturing sector combines deep integration into international production networks with an extensive domestic supplier base,providing a setting for examining this tension. Focusing on anti-dumping measures imposed by China as an importing country,this study investigates how downstream firms reorganize production when upstream industries receive protection. The analysis informs assessments of the supply chain effects of trade remedies and firms' capacity to adapt to supply chain disruptions.
The central question is whether constraints on established sources of imported intermediate inputs induce downstream firms to locate more production stages in China,and through which mechanisms this adjustment occurs. Drawing on input-output linkages,global value chain analysis,and production adjustment costs,the study develops a framework encompassing domestic input substitution,optimization of the import mix,and constraints imposed by adjustment costs. Firms can source imports from third countries,substitute domestic inputs,or bring selected production processes in-house. They can also reconfigure their remaining imports toward products further upstream. Third-country sourcing primarily changes the foreign origin of inputs,whereas domestic sourcing and in-house production shift some activities to China,with different implications for the allocation of production stages. These options entail costs associated with searching for suppliers,quality certification,equipment modification,and working capital requirements. Whether the span of domestic production stages expands therefore depends on the gains from input reallocation relative to these adjustment costs.
The empirical analysis uses data on Chinese manufacturing firms from 2000 to 2007,a period covering China's accession to the World Trade Organization and its subsequent integration into global value chains. It links data from the Chinese Customs Database,the Chinese Industrial Enterprise Database,China's input-output tables,and anti-dumping case records from the China Trade Remedies Information website. These sources provide information on firms' traded products and trading partners,operating and financial characteristics,interindustry input-output relationships,and the products,source countries,and ruling dates associated with anti-dumping cases. Following the upstreamness literature,the study first calculates the average number of production stages that each industry's output passes through before reaching final demand. It then constructs each firm's production span as import upstreamness minus export upstreamness,with the two components calculated using the firm's respective import value and export value weights. This measure captures the span of domestic production stages between imported inputs and exported products.
Identification exploits variation in covered products and sourcing countries,with treatment timing defined by affirmative final rulings imposing anti-dumping measures. A staggered difference-in-differences design compares firms importing covered intermediate goods from countries targeted by the relevant investigation with firms importing the same products from other countries. The analysis estimates the relative change in production span between these groups before and after the rulings. The baseline results show that,following affirmative final rulings,exposed firms' production spans increase by approximately 7.6% relative to those of the comparison group,indicating that constraints on intermediate input imports induce an expansion of domestic production stages. The analysis of mechanism shows that firms reduce imports of covered intermediate goods from targeted countries while increasing purchases from third countries. This diversion does not fully offset the contraction in imports from the original sources. Total imports of covered products,imports of other intermediate goods,and the number of imported varieties all decline,while domestic intermediates account for a larger share of total intermediate inputs. Firms also shift the imports they retain toward more upstream products. Import upstreamness increases significantly,whereas export upstreamness shows no statistically significant change,indicating that the expansion in production span is driven primarily by input reallocation. The expansion is weaker among firms with greater initial dependence on covered intermediate inputs,measured using the import share of these inputs in 2000-2001,reflecting the constraints imposed by adjustment costs. These effects are concentrated among non-processing trade firms,intermediate goods exporters,and non-state-owned firms.
These findings suggest that firms should tailor supply chain management to input specificity,sourcing concentration,and the time required to substitute inputs. Diversified sourcing,testing of alternative inputs,long-term supplier relationships,and appropriate inventory levels can mitigate single-source risk while preserving the efficiency gains from high-quality foreign inputs. Trade-remedy decisions should assess the benefits of protecting upstream industries alongside downstream firms' adjustment costs. Complementary policies should strengthen domestic supply networks through joint testing,quality certification,technical collaboration,and financial support. These measures can lower the costs of switching suppliers and adapting production processes,improve the compatibility of domestic inputs with firms' production requirements,and enhance supply reliability.
The study makes three contributions. First,it extends research on import volumes,sourcing locations,and product scope to the production stages covered by firms,revealing changes in production organization underlying adjustments in trade flows. Second,it extends anti-dumping analysis beyond protected industries to downstream users of intermediate inputs. By matching data on firms' imports to anti-dumping cases at both the product and source-country levels,it identifies downstream firms' actual policy exposure and examines how upstream protection generates spillovers through input-output linkages. Third,it combines evidence on domestic input substitution,a decomposition of production span into import and export upstreamness,and an analysis of initial input dependence to identify where production stage reallocation occurs,the channels involved,and the cost conditions shaping the adjustment. Together,the findings reveal a pattern of selective reallocation in which firms increase their use of domestic inputs while maintaining international sourcing,providing micro-level evidence on how supply chain shocks reshape domestic and cross-border production linkages.