Highlighting the difference to make one: differential ethicality framing increases the choice share of ethical options

Consumers often express support for ethical products, yet frequently choose cheaper,
non-ethical alternatives. This research introduces Differential Ethicality Framing (DEF),
a novel framing strategy that promotes ethical consumer choices by highlighting ethical
features as a difference relative to non-ethical alternatives. Across three online
experiments, one conjoint analysis, and one field experiment, DEF (e.g., “+50% lower
carbon emissions for greater climate resilience”) significantly increases the choice share
of ethical options (by 13% in field experiment and 20% in online experiments). Notably,
this effect persists even when the ethical option carries a price premium or a quality
disadvantage. This effect generalizes across diverse product categories and ethical
domains. DEF is proposed to operate by increasing the weight of the ethical attribute in
decision-making, thereby increasing the choice share of ethical options. The mediation
mechanism via ethical attribute weight is tested using both self-reported measures and
choice-based conjoint analysis. Importantly, DEF is effective across both numerical (e.g.,
80% recyclable) and verbal (highly recyclable) quantifiers. It is impactful under
prevention framing but not promotion framing. This research advances the literature on
differential framing and offers DEF as a simple and actionable tool for marketers to
increase ethical product choice without altering product content or price.