Executive Summary
US sanctions against China raise the cost of China’s technological ascent. Restrictions on semiconductor equipment, advanced AI chips, design software, cloud access, investment, and supply-chain reconfiguration slow China’s access to frontier technologies. China must spend more time, capital, workaround capacity, and domestic-substitution resources to reach the same level of performance.
The same pressure also returns to the US cost base. Semiconductor subsidies, reshoring, alliance coordination, export-control enforcement, supply-chain relocation, critical-mineral access, Taiwan defense, corporate revenue losses, and industrial-policy spending all expand as Washington tries to slow China’s catch-up path. The US raises China’s costs by accepting a higher burden of sustaining its own lead.
The technological frontier carries steep marginal costs. Early-stage investment can produce rapid performance gains, but near the top end each additional gain becomes more expensive. Preserving the final performance gap requires a disproportionate level of spending, coordination, and institutional support. The leading power therefore bears both the advantage and the cost of keeping that advantage in place.
China has limited incentive to carry full front-runner costs across all domains. Its stronger position lies in selective leadership combined with near-follower status across many high-cost frontier areas. While the US pays the high marginal cost of maintaining the top-end frontier, China can expand its sufficient-technology zone through domestic substitution, workaround procurement, internal demand, third-country channels, and mature-technology absorption.
US sanctions against China create a two-sided cost-imposition mechanism. They raise China’s catch-up costs and raise the US cost of maintaining the gap. Long-term competition will be shaped by cost growth, sufficient-technology thresholds, alliance coordination burdens, supply-chain replacement costs, and the cost of keeping frontier advantage strategically useful.