Scalable Suppliers in Global Trade Networks

IMF Working Papers, August 28, 2026

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Supplier scalability varies sharply across industries within countries.
Scalable suppliers tend to be connected to scalable suppliers themselves.
Downstream country-sectors exposed to more scalable suppliers respond more strongly to positive foreign demand shocks in sectors with relationship-sticky inputs.
In a calibrated multicountry, multi-sector general-equilibrium trade model with input-output linkages, heterogeneous upward-sloping supplier supply curves, and gradually adjusting sourcing relationships:
- Supplier bottlenecks substantially attenuate the export and welfare gains from a global demand expansion.
- Relationship stickiness determines where bottlenecks bind.
Counterfactual analysis shows:
- Supplier upgrading and pre-arranged access to flexible sourcing networks are most valuable when targeted toward economically central, relationship-sticky, and bottleneck-exposed parts of the production network.

Empirical approach:
- Uses bilateral trade data linked to international input-output tables to measure supplier scalability at the country-industry level and to examine effects on downstream export growth.
Theoretical framework:
- Multicountry, multi-sector general-equilibrium trade model with input-output linkages.
- Incorporates heterogeneous upward-sloping supplier supply curves.
- Incorporates gradually adjusting sourcing relationships to capture relationship stickiness.

Target supplier upgrading interventions to parts of the production network that are:
- Economically central.
- Relationship-sticky.
- Exposed to supplier bottlenecks.
Facilitate pre-arranged access to flexible sourcing networks for downstream sectors that rely on relationship-sticky inputs to amplify export and welfare gains from global demand expansions.

Subject: Economic theory, Export fluctuations, Export performance, Exports, International trade, Supply elasticity
Keywords: IMF working papers, input supplier, production networks, Scalability, scalable supplier, supplier bottleneck, supplier scalability, trade