Brown, E. (1999). Assessing the value of volunteer activity. Nonprofit and Voluntary Sector Quarterly, 28(1), 3-17.
[12]
Brown, E., & Ferris, J. M. (2007). Social capital and philanthropy:An analysis of the impact of social capital on individual giving and volunteering.Nonprofit and Voluntary Sector Quarterly, 36(1), 85-99.
[13]
Bussell, H., & Forbes, D. (2002). Understanding the volunteer market:The what, where, who and why of volunteering. International Journal of Nonprofit and Voluntary Sector Marketing, 7(3), 244-257.
[14]
Butcher, J., & Smith, P. (2010). 'Making a difference:volunteer tourism and development. Tourism Recreation Research, 35(1), 27-36.
[15]
Chen, J., & Lu, C. (2011). Democratization and the middle class in China the middle class's attitudes toward democracy. Political Research Quarterly, 64(3), 705-719.
[16]
Cuskelly, G., Taylor, T., Hoye, R., & Darcy, S. (2006). Volunteer management practices and volunteer retention:A human resource management approach. Sport Management Review, 9(2), 141-163.
[17]
Duke, N. N., Skay, C. L., Pettingell, S. L., &Bo-rowsky, I. W. (2009). From adolescent connections to social capital:Predictors of civic engagement in young adulthood. Journal of adolescent health, 44(2), 161-168.
[18]
Einolf, C. J. (2011). Gender differences in the correlates of volunteering and charitable giving. Nonprofit and Voluntary Sector Quarterly, 40(6), 1092-1112.
[19]
Feldman, N. E. (2010). Time is money:Choosing between charitable activities. American Economic Journal:Economic Policy, 2(1), 103-130.
[20]
Gesthuizen, M., & Scheepers, P. (2012). Educational differences in volunteering in cross-national perspective individual and contextual explanations. Nonprofit and Voluntary Sector Quarterly, 41(1), 58-81.
[21]
Gottlieb, B. H., & Gillespie, A. A. (2008). Volunteerism, health, and civic engagement among older adults. Canadian Journal on Aging/La Revue canadienne du vieillissement, 27(04), 399-406.
[22]
Gratton, L., &Ghoshal, S. (2003). Managing personal human capital:New ethos for the ‘volunteer’employee. European Management Journal, 21(1), 1-10.
[23]
Hank, K., & Stuck, S. (2008). Volunteer work, informal help, and care among the 50+in Europe:further evidence for ‘linked’ productive activities at older ages. Social Science Research, 37(4), 1280-1291.
[24]
Haski-Leventhal, D., & Bargal, D. (2008). The volunteer stages and transitions model:Organizational socialization of volunteers. Human Relations, 61(1), 67-102.
[25]
Inglehart, R. (1989). Culture Shift in Advanced Industrial Society.Princeton:Princeton University Press.
[26]
Lee, Y. J., &Brudney, J. L. (2009). Rational volunteering:a benefit-cost approach. International Journal of Sociology and Social Policy, 29(9/10), 512-530.
[27]
Luoh, M. C., & Herzog, A. R. (2002). Individual consequences of volunteer and paid work in old age:health and mortality. Journal of Health and Social Behavior, 490-509.
[28]
McBride, A. M., Gonzales, E., Morrow-Howell, N., & McCrary, S. (2011). Stipends in volunteer civic service:Inclusion, retention, and volunteer benefits. Public Administration Review, 71(6), 850-858.
[29]
Pho, Y. H. (2008). The value of volunteer labor and the factors influencing participation:Evidence for the United States from 2002 through 2005. Review of Income and Wealth, 54(2), 220-236.
[30]
Smith, D. H. (1981).Altruism, volunteers, and volunteerism.Nonprofit and Voluntary Sector Quarterly, 10(1), 21-36.
[31]
Solinger, D. J. (1999). Contesting Citizenship in Urban China:Peasant Migrants, the State, and the Logic of the Market. Los Angeles:University of California Press.
[32]
Tang, M. (2011). The political behavior of the chinese middle class. Journal of Chinese Political Science, 16(4), 373-387.
[33]
Taniguchi, H. (2011). The determinants of formal and informal volunteering:Evidence from the american time use survey. Voluntas:International Journal of Voluntary and Nonprofit Organizations, 23(4), 920-939.
[34]
Turner, B. S. (Ed.). (1993). Citizenship and Social Theory (Vol. 24).Beverly Hills, CA:Sage Publications Limited.
[35]
Wilson, J., &Musick, M. (1997). Who cares? Toward an integrated theory of volunteer work. American Sociological Review, 62, 694-713.
[36]
Wilson, J. (2000). Volunteering. Annual Review of Sociology, 26, 215-240.
