Models of Man: Social and Rational

Simon's central argument is that social science needs models of rational choice that provide a 'less God-like and more rat-like picture of the chooser.' He rejects the omniscient 'economic man' whose 'assumptions of omniscience and intelligence implicit in the utility function model are truly fantastic.' The book's reconstructive task, as Simon states, is 'not to substitute the irrational for the rational in the explanation of human behavior but to reconstruct the theory of the rational.' Bounded rationality is the result: a theory of choice that takes seriously the cognitive limits of actual decision-makers.

The two books form a continuous project. Administrative Behavior (1947) established decision-making as the heart of administration and introduced satisficing as the behavioral alternative to optimizing. Models of Man (1957) provides the mathematical formalization of that behavioral program, presenting sixteen papers that translate bounded rationality into rigorous models of causal ordering, social influence, and choice. One reviewer noted that the papers are 'all but one published in the years 1951–6' and are collected 'without revision,' with short introductory chapters written for the book. Together they represent Simon's sustained effort to build a behavioral science of administration on cognitive foundations.

Simon insisted that mathematics served substance, not spectacle. Responding to a reviewer who called the book 'a showcase of the usefulness of mathematics,' Simon replied that 'the aims of the book are substantive, and mathematics is used only because I found mathematics indispensable in enabling me to deal with these questions clearly and precisely.' The models address causal ordering, power relations, small group dynamics, and choice mechanisms. A contemporary reviewer observed that the mathematical precision risked creating 'the illusion that the original data are as exact as the method of treatment,' noting that only three experiments are referenced in the entire book. This tension between formal rigor and empirical grounding remains a lasting critique.

The book is a foundational text of behavioral economics. Simon's boundedly rational chooser, who searches for satisfactory alternatives rather than optimal ones, directly influenced the Carnegie School of organizational theory and later work by Kahneman, Tversky, and Thaler. One assessment argues that Simon's work provided the intellectual architecture for New Public Management, making bureaucracy 'less heavy, more fluid, and more flexible' through the design of structures that guide behavior under cognitive limits. Simon received the 1978 Nobel Prize in Economics for this body of work, and his citation count now approaches half a million.

Simon described bounded rationality as operating like a pair of scissors: one blade is the cognitive limitations of actual humans, and the other is the structure of the environment. Minds with limited cognitive resources can still make successful decisions by exploiting pre-existing structure and regularity in their surroundings. This analogy matters because it shows that bounded rationality is not simply about cognitive deficits; it is about the interaction between limited minds and structured environments. Organizations and institutions, in this view, are designed artifacts that compensate for cognitive limits by providing stable decision premises and routines.