Asymmetric Wealth Effect of Subsidized Index Contracts

In Simple Words

Imagine buying a lottery ticket that costs $1, but pays out $1,000 if a major storm hits. Paying $1 during normal weather is so cheap that it does not change weekly spending or force extra work hours to make up for the cost. However, on storm days when the ticket pays out $1,000, a sudden cash injection allows the holder to take time off work. The tiny upfront cost causes no noticeable disruption in normal times, but the large payout creates a dramatic change in labor behavior during emergency times.

Research question

Microinsurance contracts require upfront premium payments that could theoretically depress household wealth in non-payout years, potentially altering labor supply decisions. Heavily subsidizing insurance premiums ensures high adoption while minimizing negative wealth effects in normal years, creating a sharp asymmetric positive wealth shock only during indemnified shock years.

Participants

4,667 households across 42 treatment villages in India receiving subsidized insurance offers at average price Rs. 145 (with 0% to 75% randomized discounts).

Study Design

Randomized subsidy trial embedded within rainfall index insurance marketing across payout (4 villages) and non-payout villages (38 villages).

Results

Overall insurance take-up reached 42%. In non-payout villages, labor participation differences between insured and uninsured workers were statistically zero (p > 0.10, point estimate -4.6 days), whereas in payout villages, insurance payouts (Rs. 300 to Rs. 1,200) reduced labor participation by 28.5 percentage points and days worked by 15.44 days.

Takeaway

Subsidize weather index premiums for low-income households to prevent ex-ante negative income shocks during non-trigger years while maintaining strong ex-post shock protection.

Read alongside the research

Plain-English glossary

Original explanations, informed by the references below. Examples are illustrations, not data from the studies above. The research text stays unchanged.

Percentage points

The difference between two percentages.

ExampleA rise from 40% to 50% is 10 percentage points. Relative to the starting value, that is a 25% increase.

Office for National Statistics · Percentages ↗Read more about percentage points →

Related findings

• Overtime Intercept Constraint Extrapolation →Economics (general)

  Imagine trying to draw a line through points on a graph where all the dots for high hours are grouped at the very top edge; by anchoring the starting height of the line based on where all previous lower-hour lines started, researchers can accurately measure the line's upward slope.

• Administrative Social Security Data Linkage for Earnings Measurement →Economics (general)

  Instead of asking individuals to remember and report exact yearly income numbers from a decade ago, researchers obtain signed consent to link survey profiles directly to official government tax records. This creates an unalterable, objective earnings ledger covering years before and after a financial event.

• Agnostic Machine Learning Heterogeneity Detection in Field Trials →Economics (general)

  Evaluating a program using only average results is like measuring the average temperature of a room with one frozen wall and one burning wall and concluding the room is comfortable. Machine learning acts like a thermal camera, splitting the room into sections to reveal the extreme cold and extreme heat hiding behind the average.

• Audit-Protected Performance Measurement →Economics (general)

  Imagine a classroom exam where students know that random answer sheets will be double-checked by independent outside inspectors; unpredictable audits prevent students from cheating or making fake arrangements with graders.