1. Friends and social networks

2. Bases for relationships Similarity Similarity Balance (social influence) Balance (social influence) Exchange (asymmetry) Exchange (asymmetry) Social Roles (structured expectations and obligations) Social Roles (structured expectations and obligations)

3. Types of exchange Pure economic exchange Never yields social relations Social exchange Social exchange produces a role structure with obligation and differentiation Exchange theory

4. Social Exchange Giving and Taking Obligation/debt Discovery of status, dependence Key role of the norm of reciprocity (obligation to return favors) Ambiguity over valuation Uncertainty over timing of return Tendency to escalate Emergence of a role structure Exchange theory

5. Tendency to escalate Exchange theory

6. Social Exchange and Role Structures The dynamics of social exchange produce a role structure All social roles have a complement –Giver and taker –Father and child –Professor and students Exchange theory

7. Role Structures Roles involve a set of obligations and expectations Roles are a constraint on conduct At any given time, we may occupy several roles Our conception of who we are is shaped by our interactions with others and by our understandings of who they are Exchange theory

8. Midterm Review