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Lawler, Edward J. and Yoon, Joengkoo. (1996). "Commitment in Exchange Relations: Test of a Theory of Relational Cohesion." American Sociological Review 61:89108. ___________________________. (1998). "Network Structure and Emotion in Exchange Relations." American Sociological Review 63:87194. Lazarsfeld, P. and Merton, R. (1954). Friendship as a Social Process: A Substantive and Methodological Analysis. In Morroe Berger, Theodore Abel, and Charles Page, eds. Freedom and Control in Modern Society. New York: Van Nostrand, 18-66, 1954. Leifer, E. M. 1988. "Interaction Preludes to Role Setting: Exploratory Local Action." American Sociological Review 53: 865-78. Lin, Nan. (2001). Social Capital: A Theory of Social Structure and Action. New York: Cambridge University Press. Samuel R. 1999. Tracking Inequality: Stratification and Mobility in American High Schools. New York: Teacher's College Press. Maroulis, S., Guimera, R., Petry, H., Gomez, L., Amaral, L.A.N., Wilensky, U. (2010) “Complex Systems View on Educational Policy Research.” Science. 330(6000). Marsden, Peter and Elizabeth Gorman. 1998. "Social Capital in Internal Staffing Practices." In Corporate Social Capital, edited by R. a. G. Leenders, Shaul. Amsterdam: Kluwer Academic Publishers. McFarland, Daniel A. 2004. “Resistance as a Social A Study of Change‐Oriented Encounters”: American Journal of Sociology, Vol. 109, No. 6, pp. 1249-1318.