We design and implement the first real-effort experiment that can jointly estimate present bias (Ø) and sophistication (bØ), with separate preference parameters for money (Øm, bØm) and effort (Øe, bØe). In our study, participants chose to (and predicted to) complete 14% (and 10%) fewer...

Behavioral economics has shown that individuals sometimes make decisions that are not in their best interests. This insight has prompted calls for behaviorally informed policy interventions popularized under the notion of "libertarian paternalism." This type of "soft" paternalism aims at helping...