商品詳細

The book demonstrates that while behavioral finance has shown how decision-makers systematically deviate from classical rational models, exhibiting patterns such as loss aversion, anchoring, framing, and mental accounting-a fundamental question remains unresolved: why do individuals facing the same information, incentives, and risks arrive at different decisions? Even within the same individual, choices can vary across contexts and over time. This book addresses that gap by introducing Internal Family Systems (IFS) as a missing layer of psychological microfoundations.Internal Family Systems (IFS) conceptualizes the mind as a system of interacting "Parts," including Managers who seek order and control, Firefighters who react to distress, and Exiles who carry vulnerability. At the center is the Self, enabling balanced and integrative decision-making. By formally embedding these roles into economic models, the book explains not only the existence of behavioral biases but also their variability across individuals, contexts, and time.Blending behavioral finance with a rigorous parts-based framework, this book offers a novel, testable approach to understanding heterogeneous financial decision-making.