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Marginal Revolutionanalysis

“Markets are competitive if and only if P != NP”

Marginal Revolution
Monday, July 13, 2026 at 6:55 AM
~4 min read

Original Report

I prove that competitive market outcomes require computational intractability. If P = NP, firms can efficiently solve the collusion detection problem, identifying deviations from cooperative...

I prove that competitive market outcomes require computational intractability. If P = NP, firms can efficiently solve the collusion detection problem, identifying deviations from cooperative agreements in complex, noisy markets and thereby making collusion sustainable as an equilibrium. If P != NP, the collusion detection problem is computationally infeasible for markets satisfying a natural instance-hardness […] The post “Markets are competitive if and only if P != NP” appeared first on Marginal REVOLUTION.

Glass House Analysis

This story reflects the interconnected nature of modern economic systems, where developments in one sector inevitably affect others. Understanding these connections is essential for grasping how policy decisions and market movements translate into real-world outcomes for families, workers, and communities. The economy is not an abstract system of numbers—it's the sum total of decisions about who works, who prospers, and who struggles.

The implications extend beyond the immediate news cycle. Every economic development creates ripples that affect employment, prices, and opportunities in ways that may not be immediately visible but are deeply felt. By tracking these connections, we can better understand how the economy truly works—not as an abstract machine, but as a human system shaped by and shaping the lives of millions.

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