Key points are not available for this paper at this time.
Mark D. Regnerus, Christian Smith, David Sikkink, Who Gives to the Poor? The Influence of Religious Tradition and Political Location on the Personal Generosity of Americans toward the Poor, Journal for the Scientific Study of Religion, Vol. 37, No. 3 (Sep., 1998), pp. 481-493
Regnerus et al. (Tue,) studied this question.