The Basics
- Simple definition: A theory explaining business cycles through the interaction of saving, investment, and capital stock adjustments.
- Core idea: Cycles arise naturally from the economy’s internal dynamics.
- Think of it as: An economic heartbeat with regular booms and busts.
What It Actually Means
Nicholas Kaldor proposed that investment depends on output (higher output, more investment) but also on capital stock (more existing capital, less need for new investment). This creates non-linear dynamics. When output rises, investment rises, pushing output higher – but eventually capital accumulates, reducing investment, leading to a downturn. The cycle repeats. Unlike exogenous shock theories, Kaldor’s cycle is endogenous – built into the system.
Example
Pakistan experiences boom-bust cycles. Growth spurs investment, creating jobs and more growth. Eventually excess capacity builds, investment slows, growth falters. Kaldor’s model captures this internal rhythm.
Why It Matters (2026)
Understanding that cycles can be internally generated helps policymakers distinguish between temporary fluctuations and fundamental problems. It suggests managing cycles, not eliminating them entirely.
See also
Business Cycle • Multiplier-Accelerator Model • Endogenous Growth • Investment Function • Capital Stock
Read more about this with MASEconomics:
Kaldor’s Trade Cycle Model: Understanding Business Fluctuations and Fiscal Policy