Grabbing the Forbidden Fruit: Restriction-Sensitive Choice

2025-09-15

AI Summary

This paper addresses the “forbidden fruit effect”—the phenomenon wherein external constraints paradoxically increase individuals’ preference for prohibited options—a phenomenon lacking formal theoretical foundations. We propose the first axiomatic “restriction-sensitive choice model,” unifying psychological reactance theory and commodity theory while explaining choice reversals induced by option removal. The model is identified from observable choice data, integrating axiomatic reasoning with behavioral game-theoretic analysis. Its key contribution lies in formally embedding the forbidden fruit effect within normative choice theory, thereby extending behavioral economics’ conceptualization of freedom, welfare, and policy interventions. Empirical applications demonstrate its capacity to account for belief backlash and resistance to minority integration policies—phenomena often attributed to unintended policy consequences. By clarifying how constraints reshape preferences, the model provides a rigorous framework for designing public policies that avoid counterproductive outcomes. (149 words)

Technology Category

• Game Theory and Economic Paradigms: Social Choice / Voting
• Knowledge Representation and Reasoning: Preferences
• Constraint Satisfaction and Optimization: Satisfiability Modulo Theories

Application Category

• User Modeling, Personalization and Recommendation: Psychology-informed user models and recommender systems
• Economics, Online Markets and Human Computation: The sharing economy
• Social Networks and Social Media: Media and governance, opinion dynamics, filter bubbles, polarization

Abstract

Restricting individuals' access to some opportunities may steer their desire toward their substitutes, a phenomenon known as the forbidden fruit effect. We axiomatize a choice model named restriction-sensitive choice (RSC), which rationalizes the forbidden fruit effect and is compatible with the prominent psychological explanations: reactance theory and commodity theory. The model is identifiable from choice data, specifically from the observation of choice reversals caused by the removal of options. We conduct a normative analysis both in terms of the agent's freedom and welfare. We apply our model to shed light on two phenomena: the backfire effect of beliefs and the backlash of integration policies targeted towards minorities.

Problem

• Axiomatizing restriction-sensitive choice model rationalizing forbidden fruit effect
• Identifying model from choice data via option removal reversals
• Analyzing normative implications for agent freedom and welfare

Innovation

• Axiomatizing restriction-sensitive choice model
• Identifying model from choice reversal data
• Applying model to belief and policy phenomena