参考文献（References）

Aguinis, H., Beaty, J. C., Boik, R. J. ,and Pierce, C. A. 2005. “Effect Size and Power in Assessing Moderating Effects of Categorical Variables Using Multiple Regression: A 30Year Review.”〖WTB4X〗Journal of Applied Psychology〖WTB4〗(1): 94〖CD*2〗107.
Aguinis, H. and E. F. StoneRomero. 1997. “Methodological Artifacts in Moderated Multiple Regression and their Effects on Statistical Power.” 〖WTB4X〗Journal of Applied Psychology〖WTB4〗 (1): 192〖CD*2〗206.
Angelusz, R. and R. Tardos, R.. 1991. “The Strength and Weakness of Weak Ties.” in 〖WTB4X〗Values, Networks and Cultural Reproduction in Hungary〖WTB4〗, edited by Somlai,P. Budapest: Coordinating Council of Prog: 7〖CD*2〗23.
Baron, R. M. and  D. A. Kenny. 1986. “The ModeratorMediator Variable Distinction in Social Psychological Research: Conceptual, Strategic, and Statistical Considerations.”〖WTB4X〗Journal of Personality and Social Psychology〖WTB4〗(6): 1173〖CD*2〗1182. 
Bernert, C. 1983. “The Career of Causal Analysis in American Sociology.” 〖WTB4X〗The British Journal of Sociology〖WTB4〗(2): 230〖CD*2〗254.
Bian, Y. J. 1997.“Bring Strong Ties Back in: Indirect Connection, Bridges, and Job Search in China.”〖WTB4X〗American Sociology Review〖WTB4〗(3): 366〖CD*2〗385.
Blalock, M. H. 1964. 〖WTB4X〗Causal Inferences in No experimental Research.〖WTB4〗 Chapel Hill:The University of North Carolina Press..
Blalock, M. H. 1985［1962］. FourVariable Causal Models and Partial Correlations.” in 〖WTB4X〗Causal Models in the Social Science,〖WTB4〗 edited by Blalock, H. M. Aldine Publishing Company: 23〖CD*2〗38.
Blackwell, D. and J. L. Hodges. 1957. “Design for the Control of Selection Bias.”〖WTB4X〗The Annuals of Mathematical Statistics〖WTB4〗 (2): 449〖CD*2〗460.
Blau, P. M. and O. D. Duncan. 1967. 〖WTB4X〗The American Occupational Structure〖WTB4〗. New York: Wiley.
Bourdieu, P. 1986. “The Forms of Social Capital.” 〖WTB4X〗Readings in Economic Sociology〖WTB4〗: 280〖CD*2〗291.
Boxman, E. A. W., De Graaf, P. M., and Flap, H. D. 1991. “The Impact of Social and Human Capital on the Income Attainment of Dutch Managers.” 〖WTB4X〗Social Networks〖WTB4〗 (13): 51〖CD*2〗73.
Bridges, W. P. and W. J. Villemez. 1986. “Informal Hiring and Income in the Labor Market.” 〖WTB4X〗American Sociological Review〖WTB4〗, Vol. 51: 574〖CD*2〗582.
Bunge, M. 1959. 〖WTB4X〗Causality:〖WTB4〗 〖WTB4X〗The Place of the Causal Principle in Modern Science. 〖WTB4〗Cambridge: Harvard University Press.
Blalock, M. H. 1977. 〖WTB4X〗The Furniture of the World.〖WTB4〗 Dordrecht: Boston.
Blalock, M. H. 2009. 〖WTB4X〗Causality and Modern Science.〖WTB4〗 New Brunswick, New Jersey.
Burt, R. S. 1992. 〖WTB4X〗Structural Holes: The Social Structure of Competition〖WTB4〗. Harvard University Press.
Burt, R. S. 2001. “Structural Holes versus Network Closure as Social Capital.” in 〖WTB4X〗Social Capital: Theory and Research〖WTB4〗, edited By Nan Lin, Karen S. Cook, and R.S.Burt. New York: Aldine De Gruyter: 31〖CD*2〗56,.
Byrne, B. M. 2006. 〖WTB4X〗Structural Equation Modeling with EQS: Basic Concepts, Application,and Programming〖WTB4〗. Lawrence Erlbaum Associates, Publisher.
Cartwright,N.1989. 〖WTB4X〗Nature’s Capacities and Their Measurement.〖WTB4〗 Clarendon Press.
〖JP2〗Cole,N.S.1973.“Bias in Selection.”〖WTB4X〗Journal of Educational Measurement〖WTB4〗(4): 237〖CD*2〗255.〖JP〗
Coleman, J. S. 1988. “Social Capital in the Creation of Human Capital.” 〖WTB4X〗The American Journal of Sociology〖WTB4〗(94)：S95〖CD*2〗S120.
Dupré, J.and Cartwright, N. 1988. “Probability and Causality: Why Hume and Indeterminism Don’t Mix.” 〖WTB4X〗Nos〖WTB4〗(4): 521〖CD*2〗536.
Durkheim, E. 1982. 〖WTB4X〗The Rules of Sociological Method and Selected Texts on Sociology and its Method〖WTB4〗. The Macmillan Press Ltd.
Duncan, O. D. 1975. 〖WTB4X〗Introduction to Structural Equation Models〖WTB4〗. Academic Press, Inc.
Frazier, P. A.and Tix, A. P. 2004. “Testing Moderator and Mediator Effects.” 〖WTB4X〗Counseling Psychology〖WTB4〗(1): 115〖CD*2〗134.
Granovetter, M. 1973. “The Strength of Weak Ties.” 〖WTB4X〗American Journal of Sociology〖WTB4〗(78): 1360〖CD*2〗1380.
Granovetter, M. 1974. 〖WTB4X〗Getting a Job〖WTB4〗. Cambridge. MA: Harvard University press.
Guasch, J. L. and Weiss, A. 1981 “SelfSelection in the Labor Market.” 〖WTB4X〗American Economic Review〖WTB4〗(3): 275〖CD*2〗284.
Heckman, J. J. 1979.“Sample Selection Bias as a Specification Error.” Econometrica (1): 153〖CD*2〗161.
Heckman, J. J. 1989. “Causal Inference and Nonrandom Samples.” 〖WTB4X〗Journal of Educational Statistics〖WTB4〗(2): 159〖CD*2〗168.
Heckman, J. J. 1990. “Varieties of Selection Bias.” 〖WTB4X〗American Economic Review〖WTB4〗 (2):313〖CD*2〗318.
Heckman, J., Hidehiko Ichimura, Jeffrey Smith, and Petra Todd. 1998. “Characterizing Selection Bias Using Experimental Data.” 〖WTB4X〗Econometrica〖WTB4〗 (5): 1017〖CD*2〗1098.
Heider, F. 1958. 〖WTB4X〗The Psychology of Interpersonal Relations〖WTB4〗. New York: Wiley.
Holland, P. W. 1986. 〖WTB4X〗“Statistics and Causal inference.” Journal of the American Statistical Association 〖WTB4〗(396): 945〖CD*2〗960.
Holmbeck, G. N. 1997. “Toward Terminological, Conceptual, and Statistical Clarity in the Study of Mediators and Moderators: Examples from the ChildClinical and Pediatric Psychology Literatures.” 〖WTB4X〗Journal of Consulting and Clinical Psychology〖WTB4〗(4): 599〖CD*2〗610.
Hsiao, Cheng.2003. 〖WTB4X〗Analysis of Panel Data〖WTB4〗. Cambridge University Press. 
Irzik, G. 1986. “Causal Modeling and the Statistical Analysis of Causation.” 〖WTB4X〗Proceedings of the Biennial Meeting of the Philosophy of Science Association〖WTB4〗（1）: 12〖CD*2〗23.
Jaccard, J. and Turrisi, R. 2003. 〖WTB4X〗Interaction Effects in Multiple Regression〖WTB4〗. Sage Publications, Inc.
Kalleberg, A. L.and Sorensen, A. B. 1979. “The Sociology of Labor Market.” 〖WTB4X〗Annual Review of Sociology〖WTB4〗(5): 351〖CD*2〗379.
Kam, C. D. and Franzese, R. J. 2007. 〖WTB4X〗Modeling and Interpreting Interactive Hypotheses in Regression Analysis〖WTB4〗. Michigan: The University of Michigan Press.
Klein, D. M. 1987. “Causation in Sociology Today: A Revised View.” 〖WTB4X〗Sociological Theory 〖WTB4〗(1): 19〖CD*2〗26. 
Kline, R. B. 2005. 〖WTB4X〗Principle and Practice of Structural Equation Modeling〖WTB4〗. The Guilford Press.
Laumann, E. O. 1966. 〖WTB4X〗Prestige and Association in an Urban Community〖WTB4〗. Indianapolis: Bobbs Merrill.
Lin, Nan, Dayton, P. W., and Greenwald, P. 1977. “The Urban Communication Network and Social Stratification.”in 〖WTB4X〗Communication Yearbook〖WTB4〗 ck, edited by Ruben, B. and New Brunswi. NJ: Transaction Books: 55〖CD*2〗72.
Lin, Nan, Dayton, P. W., and Greenwald, P. 1978. “Analysis the Instrumental Use of Relations in the Context of Social Structure.” 〖WTB4X〗Sociological Methods and Research〖WTB4〗(7): 149〖CD*2〗166.
Lin, Nan and Dumin, M. 1986. “Access to Occupations through Social Ties.” 〖WTB4X〗Social Networks 〖WTB4〗(8): 365－385.
Lin, Nan, Ensel, W. M., and Vaughn, J. C. 1981. “Social Resource and Strength of Ties: Structural Factors in Occupational Status Attainment.” 〖WTB4X〗American Sociological Review〖WTB4〗 (46): 393〖CD*2〗405.
Lin, Nan.1982. “Social Resources and Instrumental Action.”in 〖WTB4X〗Social Structure and Network Analysis〖WTB4〗, edited By Marsden, P. V. and Nan Lin. Beverly Hills, CA: Sage:131〖CD*2〗145.
Lin, Nan. 1999. “Social Network and Status Attainment.” 〖WTB4X〗Annual Sociological Review〖WTB4〗 (25): 467〖CD*2〗487.
Lin, Nan. 2000. “Inequality in Social Capital.” 〖WTB4X〗Contemporary Sociology〖WTB4〗 (6): 785〖CD*2〗795. 
Lin, Nan. 2001a. 〖WTB4X〗Social Capital: A Theory of Social Structure and Action〖WTB4〗. Cambridge University Press.
Lin, Nan. 2001b. “Building a Network Theory of Social Capital.” in 〖WTB4X〗Social Capital: Theory and Research〖WTB4〗, edited by Nan Lin, Cook, K. and Burt, R. S.. New York:Aldine De Gruyter: 3〖CD*2〗29.
Lin, Nan. 2003. “Social Resource Theory.” In 〖WTB4X〗Encyclopedia of Sociology〖WTB4〗, edited by Edgar F. Borgatta, Rhonda J. V. Montgomery, MacMillan Reference USA.
Lin, Nan, Vaughn, J. C., and Ensel, W. M. 1981. “Social Resource and Occupational Status Attainment.”〖WTB4X〗Social Forces 〖WTB4〗(60): 1163〖CD*2〗1181.
Lin, Nan, Yangchih Fu and RayMay Hsung. 2001.“The Position Generator: Measurement Techniques for Investigations of Social Capital.”in 〖WTB4X〗Social Capital: Theory and Research〖WTB4〗, edited by Nan Lin, Cook, K., and Burt, R. S.. Aldine De Gruyter (New York): 57〖CD*2〗81.
Little, D. 1991. 〖WTB4X〗Varieties of Social Explanation: An Introduction to the Philosophy of Social Science〖WTB4〗. Westview Press. 
Little, D. 1998. 〖WTB4X〗Microfoundations, Method, and Causation. 〖WTB4〗Transaction Publishers, New Brunswick, New Jersey.
〖JP2〗Little, D. 2004.“Causal Mechanism.”〖WTB4X〗Encyclopedia of Social Science Research Method〖WTB4〗, edited by Michael LewisBeck, Alan Bryman, and Tim Futing Liao. Sage Publication.〖JP〗
〖JP2〗吕涛. 2010.作为原因的社会资本概念整合：实体、属性与因果力［J］.广东社会科学(4). ［Lü Tao. 2010. “A Conceptual Integration on Social Capital as Cause：Substance, Property and Causal Capacity.” 〖WTB4X〗Guangdong Social Science〖WTB4〗(4):166〖CD*2〗171.(in Chinese)］〖JP〗
Macki, J. L. 1965. “Cause and Conditions.” 〖WTB4X〗American Philosophical Quarterly〖WTB4〗(4): 245〖CD*2〗264.
Macki, J. L. 1980. 〖WTB4X〗The Cement of the Universe.〖WTB4〗 Oxford University Press.
Maddala, G. S. 1998. 〖WTB4X〗LimitedDependent and Qualitative Variables in Econometrics.〖WTB4〗 Cambridge University Press.
Marsden, P. V. and Hurlbert, J. S. 1988. “Social Resources and Mobility Outcomes: A Replication and Extension.” 〖WTB4X〗Social Forces〖WTB4〗(4): 1038〖CD*2〗1059.
McPherson, M., SmithLovin, L., and Cook, J. M. 2001. “Birds of A Feather: Homophily in Social Networks.” 〖WTB4X〗Annual Review of Sociology 〖WTB4〗(27): 415〖CD*2〗444.
Meyerson, E. M. 1993. “Human Capital, Social Capital, and Compensation: The Relative Contribution of Social Contacts to Managers’ Incomes.” 〖WTB4X〗Industriens Utredningsinstitut〖WTB4〗.
Mill, J. S. 1981［1843］. 〖WTB4X〗A System of Logic, Ratiocinative and Inductive〖WTB4〗. University of Toronto Press.
Montgomery, J. D. 1991. “Social Network and LaborMarket Outcomes: Toward an Economic Analysis.” 〖WTB4X〗The American Economic Review〖WTB4〗 5: 1408〖CD*2〗1418.
Montgomery, J. D. 1992. “Job Search and Network Composition: Implications of the StrengthofWeakTies Hypothesis.” 〖WTB4X〗American Sociological Review〖WTB4〗 5: 586〖CD*2〗596. 
Montgomery, J. D. 1994. “Weak Ties, Employment, and Inequality: An Equilibrium Analysis.” 〖WTB4X〗The American Journal of Sociology〖WTB4〗 (4): 1212〖CD*2〗1236.
〖JP2〗Mouw,T.2002.“Racial Differences in the Effects of Job Contacts: Conflicting Evidence from CrossSectional and Longitudinal Data.” 〖WTB4X〗Social Science Research 〖WTB4〗(31): 511〖CD*2〗538.〖JP〗
Mouw,T. 2003.“Social Capital and Finding a Job: Do Contacts Matter?”〖WTB4X〗American Sociological Review〖WTB4〗(68): 868〖CD*2〗898.
Mouw,T. 2006. “Estimating the Causal Effect of Social Capital: a Review of Recent Research.” 〖WTB4X〗Annual Review of Sociology〖WTB4〗(32) : 79〖CD*2〗102. 
Ragin, C. C. 1987. 〖WTB4X〗The Comparative Method〖WTB4〗. University of California Press.
Salmon, W. C. 1984. 〖WTB4X〗Scientific Explanation and the Causal Structure of the World〖WTB4〗. Princeton University Press.
Salzberg, A. J. “Removable Selection Bias in QuasiExperiments.” 〖WTB4X〗The American Statistican〖WTB4〗(2): 103〖CD*2〗107.
Sobel, M. 1995. “Causal Inference in the Social and Behavior Sciences.” in 〖WTB4X〗Handbook of Statistical Modeling for the Social and Behavior Sciences〖WTB4〗, editd by Arminger, G., Clogg, C. C., and Sobel, M. Plenum Press, NewYork.
Sobel, M. 1996. “An Introduction to Causal Inference.” 〖WTB4X〗Sociological Methods and Research〖WTB4〗(3): 353〖CD*2〗379.
Suppes, P. 1970.〖WTB4X〗A Probabilistic Theory of Causality.〖WTB4〗Amsterdam: NorthHolland.
Weber, M. 1978 〖WTB4X〗Economy and Society〖WTB4〗. Edited by Guenther Roth and Claus Wittich University of California Press.
Wegener, B. 1991. “Job Mobility and Social Ties: Social Resources, Prior Job, and Status Attainment.” 〖WTB4X〗American Sociological Review〖WTB4〗 (1): 60〖CD*2〗71. 
Willis, R. J.and Rosen, S. 1979 “Education and SelfSelection.”〖WTB4X〗The Journal of Political Economy〖WTB4〗 (5): S7〖CD*2〗S36.
Winship, C.and Mare, R. D. 1992 “Models for Sample Selection Bias.” 〖WTB4X〗Annual Review of Sociology〖WTB4〗(18): 327〖CD*2〗350.
Winship, C. and Morgan, S. L. 1999 “The Estimation of Causal Effects from Observational Data.”〖WTB4X〗Annual Review of Sociology〖WTB4〗(25): 659〖CD*2〗706.

责任编辑：李聆
实习编辑：肖日葵