The Impact of Geopolitical Conflicts on Trade, Growth, and Innovation

TL;DR

This paper models how geopolitical conflicts and decoupling scenarios can significantly reduce global welfare, especially in lower-income regions, by affecting trade, innovation, and economic growth through a multi-sector, idea diffusion framework.

Contribution

It introduces a multi-sector general equilibrium model with dynamic idea diffusion to quantify welfare impacts of geopolitical decoupling scenarios.

Findings

Welfare losses can reach up to 15% in some regions under decoupling.

Idea diffusion amplifies welfare losses compared to models without diffusion.

Multi-sector modeling worsens diffusion inefficiencies relative to single-sector models.

Abstract

Geopolitical conflicts have increasingly been a driver of trade policy. We study the potential effects of global and persistent geopolitical conflicts on trade, technological innovation, and economic growth. In conventional trade models the welfare costs of such conflicts are modest. We build a multi-sector multi-region general equilibrium model with dynamic sector-specific knowledge diffusion, which magnifies welfare losses of trade conflicts. Idea diffusion is mediated by the input-output structure of production, such that both sector cost shares and import trade shares characterize the source distribution of ideas. Using this framework, we explore the potential impact of a "decoupling of the global economy," a hypothetical scenario under which technology systems would diverge in the global economy. We divide the global economy into two geopolitical blocs -- East and West -- based on foreign policy similarity and model decoupling through an increase in iceberg trade costs (full decoupling) or tariffs (tariff decoupling). Results yield three main insights. First, the projected welfare losses for the global economy of a decoupling scenario can be drastic, as large as 15% in some regions and are largest in the lower income regions as they would benefit less from technology spillovers from richer areas. Second, the described size and pattern of welfare effects are specific to the model with diffusion of ideas. Without diffusion of ideas the size and variation across regions of the welfare losses would be substantially smaller. Third, a multi-sector framework exacerbates diffusion inefficiencies induced by trade costs relative to a single-sector one.