p.36 It is useful to differentiate between two kinds of beliefs that motivate behavior: internalized beliefs and behavioral beliefs (expectations). Internalized beliefs are those regarding the structure and details of the world we experience (and potentially other worlds) and the implied relationship between actions and outcomes. They reflect knowledge in the form of cognitive (mental) models that individuals develop to explain and understand their environment. Such beliefs can directly motivate behavior at the individual level... Behavioral beliefs are beliefs about the behavior of others in various contingencies, whether or not the behavior actually occurs. An individual's beliefs about others' behavior directly influences his behavioral choices.

p.125 In short, social rules constitute the heuristics that enable and guide behavior by helping individuals to form beliefs about the world around them and what to expect from others.

p.126 A structure made up of institutionalized rules and beliefs enables, guides, and motivates the self-enforcing behavior that reproduces it.

p.129 Because there are multiple equilibria and because the behavior that serves one best depends on the particular equilibrium behavior others are following, rationality alone is insufficient to guide one how to behave. One faces a coordination problem.

p.136 We can thus see how institutionalized rules and the beliefs they help form enable, guide, and motivate most individuals to adopt the behavior associated with their social position most of the time.

p.166 once a particular pattern of behavior has been institutionalized, individuals tend to rely more on habits and routines than on reason and calculations. We follow institutionalized behavior habitually because of the scarcity of cognitive resources... Habit enables people to devote scarce resources to other tasks.

p.190 Individuals seek a cognitive framework, information, normative guidance, and a way to anticipate what others may do to coordinate their behavior with their responses... these micro-foundations of behavior... reside in memories, constitute cognitive models, embody preferences, and constitute commonly known behavioral beliefs.