i-frame vs s-frame
Also known as: Individual frame and system frame
The choice between fixing problems at the individual level (nudges) versus the systemic level (rules, prices, structures).
What it means
The i-frame focuses on changing individual behavior — nudges, information, small incentives — while the s-frame changes the system: laws, taxes, market structures, defaults set by regulation, and the rules of the game. Chater and Loewenstein argue that behavioral science leaned too heavily on cheap i-frame fixes for problems whose real causes are structural, and that this focus can even be co-opted to forestall the more effective s-frame reforms industries fear. The provocation is empirical as well as political: large field reviews find average nudge effects far smaller than the headline academic estimates, while measures like carbon taxes or smoking laws move outcomes at scale. The counterpoint is that the frames are complementary, and well-chosen i-frame tools still help. It matters because it forces practitioners to ask whether a behavioral intervention is the right altitude for the problem at all.
Examples
For obesity, an i-frame approach relabels menus; an s-frame approach reformulates products, taxes sugar, and restricts marketing — and the latter tends to dwarf the former.
Asking households to recycle diligently is i-frame; requiring producers to use less packaging is s-frame — and only one of them removes the waste before it ever exists.
Reminding gamblers to 'stay in control' is the i-frame message the industry is happy to fund; stake limits and advertising bans are the s-frame it spends heavily to prevent.
First described in Nick Chater & George Loewenstein (2022).