Disguised unemployment

Background and evolution

Later economists, such as Theodore Schultz, questioned whether marginal productivity is ever truly zero, pointing to evidence that farm output fell when workers died in epidemics. The modern view is that labour productivity in agriculture is very low rather than strictly zero, and that seasonal peaks need many hands, which is why surplus labour is best understood as underemployment over much of the year.

In standard statistics, a person is unemployed only if they are without work and looking for it. But in a poor rural economy, very few people can afford to be openly unemployed. Instead, family members share the work on a small plot, each working fewer hours or less intensively than they could. If a family of six cultivates a plot that three could manage, three are effectively surplus: their departure would not reduce the harvest. Economists call this disguised unemployment.

The idea became central to development economics through Arthur Lewis, who argued that poor economies have a large "traditional" sector with surplus labour and a small "modern" sector. As the modern sector grows, it can draw workers from agriculture at a constant wage without reducing farm output, fuelling industrialisation. This page uses disguised unemployment to understand India's structural transformation problem, why so many workers remain on farms, and what it would take to move them into more productive work.