Downstream investment and lead firms shape supplier wages and capital
A Bank of Japan study reveals that Japanese manufacturing firms adjust capital investment and regular wages based on downstream customer activity and lead firms within supply chains, while temporary foreign demand shocks induce synchronized bonus payouts across production networks.
Bonus spillovers and investment ripple effects
Using network data covering 13,013 Japanese manufacturing firms, researchers tracked how economic shocks propagate through supply chains.
Temporary foreign demand fluctuations trigger strong bonus linkages across direct and indirect exporters, with bonus elasticity to sales reaching 0.99 for exporters and 0.93 for indirect suppliers.
Furthermore, capital investment downstream directly stimulates capital spending upstream among component suppliers.
This investment linkage is particularly pronounced in materials and electronics sectors, including steel, non-ferrous metals, and automotive equipment.
Overseas subsidiaries of Japanese suppliers similarly mirror the capital expenditure patterns of their domestic parent companies' primary clients.
Automotive lead firms set the wage pace
Regular wage setting displays strong synchronization centered around 197 identified focal firms positioned at the apex of supply chains.
In transport equipment networks, suppliers determine wage revisions shortly after focal firms publish their decisions.
However, this wage alignment diminishes as physical distance from the lead firm increases across transaction tiers.
Tier-one suppliers mirror focal firm base pay changes closely, whereas tier-three suppliers show virtually zero correlation, reflecting weaker pricing power and diminished cost pass-through capacity at higher upstream stages.
Keiretsu discipline in modern clothes
Central bank models ignoring supply chain hierarchies miscalculate how wage increases transmit across the economy.
Operational control over supplier pay and capital plans remains anchored with apex manufacturers.
Monetary stimulus cannot generate broad wage gains without improved price pass-through to upstream suppliers.