The Retreat from Free Trade
For decades, the global economy was driven by the Ricardian theory of Comparative Advantage, prioritizing cost-efficiency over security. Today, geopolitical tensions have catalyzed geoeconomic fragmentation-the division of the global economy into competing blocs.
Industrial Policy Resurgence
Governments are heavily intervening to subsidize critical sectors (e.g., semiconductors, green energy). Economically, subsidies cause deadweight loss by distorting market prices. However, proponents argue they are necessary due to positive externalities (knowledge spillovers) and national security imperatives.
The welfare effect of a subsidy $S$ can be modeled as altering the supply curve downward, creating producer and consumer surplus gains, but generating a fiscal cost that exceeds those gains, mathematically formalized as:
$$ DWL = \frac{1}{2} \times S \times \Delta Q $$