Low-level equilibrium trap
Topic: Economic Growth Theories and Business Cycles · NCERT: Beyond NCERT
Meaning
The low-level equilibrium trap (Richard Nelson, 1956) explains why some poor countries stay stuck near subsistence income. Any small rise in per-capita income leads to faster population growth, for example through lower death rates. The larger population then pulls income per head back down to where it started. Small, gradual efforts cannot break the trap. It needs a large push in investment that raises income faster than population can grow.
Example
Suppose better harvests raise income per head in a poor economy by 2%. If population then grows 2% faster, income per head falls back to its old level, and the economy returns to the trap.
Don't confuse with
- Vicious circle of poverty (Nurkse, 1953): here the chain is low income → low saving → low investment → low income. It works through saving, not population.
- Middle-income trap: this is a stall at middle income, when cheap-labour advantages fade before innovation capacity is built. It is not a stall near subsistence.
Related concepts
- Big push theory
- Balanced growth theory
- Unbalanced growth theory
- Balanced versus unbalanced growth
- Backward and forward linkages
- Rostow's stages of economic growth
- Growth pole theory
- Cumulative causation