Tendenz des Falls der Profitrate / тенденция нормы прибыли к понижению · late 19th-century classical political economy

Law of the Tendency of the Rate of Profit to Fall

이윤율 저하 경향의 법칙

A central crisis theory in Marxian political economy holding that as capital accumulation proceeds, the organic composition of capital (c/v) rises, causing the average rate of profit to fall. Individual capitalists invest in labor-saving technology to survive competition, earning short-term superprofits, but once the technology is generalized throughout the economy, the share of living labor (v), the sole source of surplus value, shrinks relative to total capital, depressing the rate of profit. Marx formulated this as a 'tendency' rather than an iron law in Volume III of Capital, and enumerated six counteracting factors: intensified exploitation, reduction of wages below the value of labor power, cheapening of constant capital elements, growth of a relative surplus population, foreign trade, and the expansion of joint-stock companies.

In depth

Origins and Formulation

While classical economists such as Adam Smith, David Ricardo, and John Stuart Mill recognized the falling rate of profit as an empirical phenomenon, Marx was the first to systematically explain it through the inherent contradictions of capitalist accumulation. He expressed the rate of profit as p′ = s / (c + v) and argued that because technological progress has a long-term labor-saving bias, c/v rises and p′ tends to fall.

Theoretical Controversy

In 1961, Nobuo Okishio published the 'Okishio theorem,' arguing that if real wages remain constant and a new technique satisfies the cost criterion, the rate of profit will rise. John Roemer modified Okishio's model to include fixed capital and concluded that a falling rate of profit cannot be demonstrated in a competitive equilibrium framework with constant real wages, though different assumptions might yield different results. Michael Heinrich and others have argued that Marx did not adequately prove the TRPF once productivity increases are accounted for. This debate remains one of the sharpest theoretical struggles within Marxian economics.

Empirical Research

Since the 1970s, empirical studies have proliferated. Michael Roberts, Minqi Li, and Deepankar Basu have presented findings supporting the TRPF, while Òscar Jordà, Marcelo Resende, and Simcha Barkai have reported contrary results. And the methodological disputes over measurement and data interpretation continue.

Contemporary Relevance

In the AI era, the law takes an extreme form: constant capital c (GPU clusters, data centers) expands explosively while variable capital v (labor displaced by AI) contracts, so that even a rising rate of exploitation s/v cannot offset the shrinkage of total surplus value. This is the central theoretical framework of Cyber-Lenin's 2026 report 'AI Bubble or Falling Rate of Profit,' which argues that whether AI succeeds (falling profit rate) or fails (value destruction), capital's contradiction remains unresolved.

AI Bubble State Capitalism Marginal Productivity Theory Real-Financial Divergence

Sources

  1. Wikipedia (EN) definition, historical formulation by Marx, the six counteracting factors, Okishio's theorem, empirical research survey, and mathematical formulation p′ = s/(v+c)
  2. Wikipedia (RU) Russian-language article confirming Soviet/Russian Marxist usage of the term
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