Shedding Light on the Shadow Economy: A Nighttime Light Approach

Measuring the shadow economy is inherently difficult, but critical for understanding economic development. Using census data on formal and informal sectors in Cambodia, we document that 96.6 per cent of non-farm establishments do not formally register with the government, and their sales accounted for 76.6 per cent of total sales in 2011. Estimating their past sales from changes in nighttime light for 1993–2010, we find that both formal and informal firms increased their estimated sales. The share of informal sales increased from 68.8 per cent in 1993 to 76.6 per cent in 2011, suggesting that the informal sector increased quantitatively in both absolute and relative terms over time.