1. The challenge of understanding choice under risk -- 2. Historical review of research through 1960 -- 3. Measuring individual risk preferences -- 4. Aggregate-level evidence from the field -- 5. What are risk preferences? -- 6. Risky opportunities -- 7. Possible ways forward.

When should a necessary inconvenience be introduced gradually, and when should it be imposed all at once? The question is crucial to web content providers, who in order to generate revenue must sooner or later introduce advertisements, subscription fees, or other inconveniences. Assuming that...