a variety of self-interest seeking but extends simple self-interest seeking assumption to include self-interest seeking with guile thereby making allowance for strategic behavior. (Williamson, 1975, p.26; 1986, p.12 5); [examples: strategic manipulation of information or misrepresentation of intentions; false or empty, i.e. self-disbelieved, threats or promises, Goffman, 1969] has profound implications for choosing between alternative contractual relationships. Opportunistic behavior contrasts with stewardship behavior which involves a trust relation in which the word of a party can be taken as his bond. (1975, p.26)