Clarke Rational Basis Risk Rejection

In Simple Words

Imagine a cautious homeowner who buys storm insurance. If a tornado destroys their house but a distant airport weather gauge registers normal wind speeds, the insurance company refuses to pay, leaving the homeowner poorer by the cost of the unpaid claim plus the insurance fee.

Research question

Under index insurance with basis risk, highly risk-averse farmers face the hazard of incurring a total crop loss without receiving an insurance payout while still paying the insurance premium. This creates a scenario where risk-averse individuals rationally demand less index insurance than risk-neutral individuals.

Participants

N = 2,399 rural smallholder households in Amhara, Ethiopia (baseline contingent valuation) and N = 418 households (behavioral game experiments).

Study Design

Probit regression analyzing stated willingness to pay and actual purchase behavior against experimental risk aversion measures and distance-based basis risk metrics.

Results

Risk aversion is negatively correlated with stated willingness to pay (p < 0.05) and shows no positive effect on actual uptake (marginal effect = -0.00285, p > 0.10), confirming theoretical models where basis risk reverses standard expected utility predictions.

Takeaway

Incorporate downside basis risk protections or supplemental loss-verification mechanisms to prevent risk-averse farmers from rejecting index insurance contracts.

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.

Baseline

The starting measurements in a study. Researchers use these to compare what participants were like at the start with what happens later.

ExampleBefore a training programme starts, researchers measure workers’ earnings. That first measurement is the baseline.

GET-IT glossary · Baseline characteristics ↗Read more about baseline →

Related findings

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  Imagine a roulette player who sees red hit five times in a row and decides to bet heavily on black because they believe the wheel is due for a change. A farmer who lost crops to a drought last year assumes next year is guaranteed to have good rain, so they refuse to pay for drought insurance.

• Action-Plan Prompts for Behavioral Search Barriers →Behaviour & psychology

  Think of a person wanting to get fit who buys a gym membership but never goes because deciding what to do each day feels overwhelming. Writing down a concrete, step-by-step weekly schedule specifying exactly when, where, and how many gym visits will occur removes decision fatigue and turns vague intentions into automated habits.

• Adult Non-Cognitive Personality Trait Malleability →Behaviour & psychology

  Think of adult personality traits like set concrete paths across a public park. Structured workplace practice—such as role-playing assertive communication and executing daily goal-setting—acts like repaving those paths, proving that adults can forge wider, more confident walking routes even late in life.

• Ambiguity Aversion in Novel Financial Products →Behaviour & psychology

  Imagine being offered a mystery box for ten dollars; you are told it contains a prize worth fifty dollars whenever a rare weather event happens, but nobody explains how the weather is measured or who decides when the payout occurs. Even a person who likes taking risks will refuse to buy the box because they do not trust an unfamiliar rulebook.