Behavioral plasticity and equitable rationality: towards an economics of adaptive cognition[«Plasticité comportementale et rationalité équitable : vers une économie de la cognition adaptative »]

This paper introduces a novel framework of economic rationality based on cognitive plasticity, modeled through the AORA operator (Andriamanantena Operator for Risk Aggregation). Plasticity is conceptualized as a dynamic equilibrium mechanism between rigidity and adaptability, integrating bounded rationality, memory, emotion, and justice within a unified formal system. Results reveal a critical threshold θ ∗ corresponding to a reflective rationality where cognitive equity enhances systemic stability. This leads to the emergence of a plastic cognitive economy, reconciling individual learning, collective coherence, and epistemic justice. Practical implications include adaptive governance, learning-based public policy, and the design of resilient socio-economic institutions.