Reference point
Also known as: Reference state
The baseline against which every outcome is coded as a gain or a loss.
What it means
The reference point is the neutral baseline from which prospect theory measures outcomes, determining whether a given result registers as a gain or a loss and thus which limb of the value function applies. It is most often the status quo, but it can be set by expectations, aspirations, prior outcomes, social comparison, or the framing of a problem, which makes it both powerful and manipulable. Because the same objective outcome can be a gain relative to one reference point and a loss relative to another, control of the reference point is control of choice. A major theoretical question is how reference points form; Koszegi and Rabin influentially modeled them as rational expectations about outcomes. The concept is the linchpin that connects loss aversion, framing, the endowment effect, and disappointment into one system.
Examples
A $90,000 salary feels like a win to someone who expected $80,000 and a bitter loss to someone who expected $100,000 — same paycheck, different reference point.
A seller who paid £400,000 for the flat treats that as the baseline and rejects £380,000 as a loss, even though the market now values it at £370,000.
A student who was banking on a first is crushed by a 2:1, while the classmate who feared failing celebrates the identical mark in the same pub.
First described in Kahneman & Tversky (1979); expectations-based formulation, Koszegi & Rabin (2006).
Where this comes up
- Behavioral Communication & Messaging: A Science-Based Path to Persuasive CommunicationHow Behavioral Communication and Messaging Can Help Organizations Influence Action
- Adaptive Behavioral Interventions Through Design: A Case Study MethodologyDesign has a measurable influence on human behavior. Across workplaces, schools, public institutions, and urban environ…