Key points are not available for this paper at this time.
Patricia A. Duff, Yuko Uchida, The Negotiation of Teachers' Sociocultural Identities and Practices in Postsecondary EFL Classrooms, TESOL Quarterly, Vol. 31, No. 3, Language and Identity (Autumn, 1997), pp. 451-486
Duff et al. (1997) studied this question.