Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
When health insurance reforms involve non‐linear price schedules tied to payment periods (for example, fees levied by quarter or year), the empirical analysis of its effects has to take the within‐period time structure of incentives into account. The analysis is further complicated when demand data are obtained from a survey in which the reporting period does not coincide with the payment period. We illustrate these issues using as an example a health care reform in Germany that imposed a per‐quarter fee of €10 for doctor visits and additionally set an out‐of‐pocket maximum. This co‐payment structure results in an effective ‘spot’ price for a doctor visit that decreases over time within each payment period. Taking this variation into account, we find a substantial reform effect—especially so for young adults. Overall, the number of doctor visits decreased by around 9% in the young population. The probability of visiting a physician in any given quarter decreased by around 4 to 8 percentage points. Copyright © 2013 John Wiley & Sons, Ltd.