The Buy-In Effect: When Increasing Initial Effort Encourages Follow-Through
Holly Dykstra,
Shibeal O' Flaherty and
Ashley Whillans
No 21442, CEPR Discussion Papers from Centre for Economic Policy Research
Abstract:
Behavioral interventions often focus on reducing friction to encourage behavior change. In contrast, we provide evidence that adding initial friction to a sign-up process can increase follow-through behavior. In a field experiment with a state department of transportation (N = 27,227), we test whether adding modest friction during sign-up for a carpool platform increases usage. While a more effortful sign-up process leads to 25% fewer sign-ups, overall usage increases. Importantly, these results were only partly explained by selection: using an intent-to-treat analysis, participants with a more effortful sign-up process took 1.6 times more carpool trips per week over four months, leading to more overall trips despite fewer users. In a second experiment with online task work, participants with more effortful sign-up were 37% more likely to return the next day and completed more work overall. These results suggest that adding friction may be an overlooked strategy when follow-through, rather than initial uptake, is the primary goal.
Keywords: intention-action gap; follow-through; effort costs; frictions; Field experiment; behavioral science; Transportation (search for similar items in EconPapers)
JEL-codes: C93 D91 R41 (search for similar items in EconPapers)
Date: 2026-05
References: Add references at CitEc
Citations:
Downloads: (external link)
https://cepr.org/publications/DP21442 (application/pdf)
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX
RIS (EndNote, ProCite, RefMan)
HTML/Text
Persistent link: https://EconPapers.repec.org/RePEc:cpr:ceprdp:21442
Ordering information: This working paper can be ordered from
https://cepr.org/publications/DP21442
Access Statistics for this paper
More papers in CEPR Discussion Papers from Centre for Economic Policy Research 33 Great Sutton Street, London EC1V 0DX, UK.
Bibliographic data for series maintained by CEPR ().