Volunteering Applications and methodology Applied Social Psychology



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Selection and omitted variables

+


Start t0-2

Altruistic values t0

-

+


Quit t0-2

Trust t0

+

+

Confidence t1

+

Confidence t2

Based on Bekkers, R. & Bowman, W. (2009). The Relationship Between Confidence in Charitable Organizations and Volunteering Revisited. Nonprofit & Voluntary Sector Quarterly, 38 (5): 884-897.

Laurence (2015)

  • How does job displacement affect trust?
  • The NCDS was a sample of all individuals born in a single week in March, 1958.
  • What happened to trust in the UK between 1991 and 2008?
  • What happened to the trust of those Britons whose jobs were displaced between 1991 (age 33) and 2008 (age 50)?

Changes from age 33 to 50

Changes from age 33 to 50

Questions for Laurence (2015)

  • The article uses longitudinal data, right?
  • How are selection effects taken into account?
  • How can you check for selection effects by inspecting changes in ‘X’ as a result of changes in ‘Y’ in this case?
  • How is the lagged dependent model different from a fixed effects model?

Volunteering Effects on Health

Depression (CESD)


Subjective health

Constant

8.809

3.540

Random effects

***-1.569

***.163

Fixed effects

***-.814

***.097

Hausman test

***36.96

***19.00

Estimates on effects of volunteering on depression and subjective health from random and fixed effects models. Source: LASA, 1992-2002 (n=7,864; 2,362). Bekkers, R., Van Tilburg, T.G., Aartsen, M., Brown, S. & Wilson, J. (2007). ‘Volunteering and Health: A Prospective Study of Mediating Mechanisms’. Unpublished manuscript.

So…

  • Use longitudinal data and then still do not claim too much about effects of voluntary action.
  • Selection effects are a big part of the reason why voluntary action is related to networks, values and health.
  • Always check for selection effects by inspecting changes in ‘X’ as a result of changes in ‘Y’.
  • Estimate fixed effects and first difference models.

Questions on Konrath et al.

  • The article uses longitudinal data, right?
  • How are selection effects taken into account?
  • How can you check for selection effects by inspecting changes in ‘X’ as a result of changes in ‘Y’ in this case?
  • How to estimate a fixed effects model of mortality?
  • How to estimate a first difference model?

Contact

  • ‘Geven in Nederland’, Philanthropic Studies, Faculteit Sociale Wetenschappen, Vrije Universiteit Amsterdam: www.geveninnederland.nl
  • René Bekkers, r.bekkers@vu.nl
  • Blog: renebekkers.wordpress.com
  • Twitter: @renebekkers
  • Please do get in touch if you want to write your thesis on charitable giving, volunteering, blood donation, etc.!



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