Behavioral Economics

Core concepts in this department

• Hyperbolic Discounting

  Hyperbolic discounting is a time-inconsistent preference pattern where people place disproportionate weight on immediate rewards and steeply discount near-term future payoffs, then flatten their discount curve for more distant periods. It explains why subscribers sign up enthusiastically but churn when the first renewal charge arrives.

• Prospect Theory

  Prospect theory, developed by Kahneman and Tversky, describes how people choose under risk: outcomes are evaluated as gains or losses relative to a reference point, losses weigh roughly 2.25× more than equivalent gains, and both gains and losses exhibit diminishing sensitivity.

• Loss Aversion

  Loss aversion is the empirical finding that the psychological impact of a loss is roughly twice the impact of an equivalent gain, the loss aversion coefficient λ is typically estimated at 2.0 to 2.5 in controlled settings but varies with stakes, platform investment, and framing context.

• Endowment Effect

  The endowment effect is the finding that people demand significantly more to give up an object than they would pay to acquire it. In digital products, activated accounts and populated workspaces create psychological ownership that makes downgrade and cancellation substantially harder than the symmetric purchase decision.

• Sunk Cost Fallacy

  The sunk cost fallacy is the tendency to continue investing in a project, product, or relationship because of cumulative prior investment, regardless of whether additional investment produces positive expected value. In product adoption, it creates both productive lock-in (customization investment) and destructive persistence (continuing to use a failing tool).

• Choice Architecture

  Choice architecture is the deliberate design of the context in which decisions are made, the ordering of options, the default selection, the framing of trade-offs, and the number of alternatives presented. In digital products, it determines which outcome occurs when users operate on low cognitive engagement.

• Decoy Effect

  The decoy effect is the phenomenon where adding a third, asymmetrically dominated option to a choice set shifts preference toward the target option. In dynamic pricing it is operationalized by introducing a decoy tier designed to be chosen against, increasing conversion to the intended price point by 20-40% in controlled experiments.

• Mental Accounting

  Mental accounting, formalized by Richard Thaler, is the tendency to segregate money into non-fungible categories based on source, intended use, or currency, and to apply different decision rules to each. In multi-currency e-commerce it explains why identical purchases feel costlier in a native currency than in a secondary one.

• Temporal Construal Theory

  Temporal Construal Theory (Trope and Liberman, 2003) holds that people mentally represent distant events in abstract, high-level terms and near events in concrete, low-level terms. Landing-page copy that matches the reader's psychological distance, abstract for cold traffic, concrete for hot, converts systematically better than generic copy.

• IKEA Effect

  The IKEA Effect (Norton, Mochon, Ariely, 2012) is the finding that people place disproportionately high value on objects they have partially created themselves, a 63% WTP premium over identical pre-assembled items. In product adoption it converts early configuration effort into durable retention via effort justification.

• Mood Index

  The Mood Index is a proposed three-component framework for thinking about cosmetics e-commerce purchase behavior in clinical-psychology terms over a trailing 180-day window. The three components are an affect score, a compulsivity score, and an identity score. The construct has not been formally validated, the operational weights and thresholds discussed in the source essay are starting points for testing rather than benchmarks.

• Affect Regulation

  Affect regulation in consumer behavior is the use of purchase decisions to repair, sustain, or adjust mood states. Atalay and Meloy (2011) demonstrated that unplanned purchases reliably improve self-reported affect for hours after the transaction, with the effect concentrated in indulgence categories like cosmetics, apparel, and accessories.

• Compulsive Buying Disorder

  Compulsive buying disorder is a behavioral pattern of recurrent, irresistible urges to purchase, accompanied by distress, financial harm, or social impairment. The Faber and O'Guinn (1992) Compulsive Buying Scale is the standard screening instrument; prevalence estimates in adult women cluster around 5 to 8 percent across multiple international replications.

• Extended Self

  The extended-self framework, developed by Belk (1988) and updated by Belk (2013) for the digital era, holds that possessions function as extensions of identity. The framework explains why intimate, ritualized, visible consumption categories (cosmetics, jewelry, vehicles, residences) generate stronger brand loyalty and identity-driven purchase patterns than utility categories.