The first intervention examined was "a randomized controlled trial nudge intervention [that] used letter and email reminders to encourage consumers to switch plans," and the second was a quasi-experimental crosswalk
intervention "which automatically enrolled eligible households from bronze plans into zero-premium [cost-sharing reduction (CSR)] silver plans."
Wolf and colleagues examine the results of these interventions and find that the nudge intervention led to a statistically significant increase in CSR silver plan take-up, although 90 percent of households remained in nonsilver plans.
The automatic crosswalk intervention also resulted in an increase in CSR silver plan uptake, with more than 90 percent of households enrolling in CSR silver plans.
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