What is the Kondratiev Wave?

In economics, Kondratiev waves (also called supercycles, great surges, long waves, K-waves, or the long economic cycle) are hypothesized cycle-like phenomena in the modern world economy. The theory suggests that capitalist economies experience long-term cycles of boom and bust, each lasting from 40 to 60 years.

The phenomenon is closely connected with the technology life cycle. The cycles consist of alternating intervals of high sectoral growth and intervals of relatively slow growth.

Origin of the Theory

The concept was first brought to international attention by the Soviet economist Nikolai Kondratiev (also written Kondratieff or Kondratyev) in his book The Long Waves in Economic Life (1926). He noticed that agricultural products and copper prices underwent long-term economic cycles, which he believed resulted from technological innovation.

In 1939, economist Joseph Schumpeter suggested naming the cycles "Kondratieff waves" in his honor. Schumpeter argued that technological innovation drives these economic cycles.

How It Works

Kondratiev collected almost 150 years of data on commodity prices from various markets. By analyzing the data, he identified what he believed to be a regular wave-like pattern with a period of approximately 50 years.

He asserted that two full cycles could be observed in his data:

· First wave: 1790–1849

· Second wave: 1850–1896

He believed that world commodity markets were about mid-way through a third wave.

The Four Phases

Each cycle is typically characterized by four distinct phases:

1. Expansion/Prosperity (Spring/Upwave): A period of high growth, technological innovation, and rising prices.

2. Stagnation/Recession (Summer/Plateau): Growth slows, and the economy reaches a peak before beginning to decline.

3. Depression/Collapse (Autumn/Winter/Downwave): A period of economic stagnation, falling prices, and recession.

4. Recovery (Spring): The economy begins to recover, setting the stage for the next wave of growth.

Historical Waves

Since the 18th century, economists have identified five Kondratiev Waves, with a sixth cycle believed to have started around 2005:

· First Wave (1780–1830): Driven by the invention of the steam engine.

· Second Wave (1830–1880): Driven by the growth of the steel industry and railroads.

· Third, Fourth, and Fifth Waves (1880–2005): Driven by subsequent technological revolutions.

Controversy and Criticism

It is important to note that long wave theory is not accepted by most academic economists. Among economists who do accept it, there is a lack of agreement about both the cause of the waves and the start and end years of particular waves. Among critics, the consensus is that it involves recognizing patterns that may not exist (apophenia).