How did arthur brooks decide that republicans give more to charity than democrats?

Arthur Brooks is a social scientist and the President of the American Enterprise Institute, a conservative think tank. He has written books on charitable giving in America and his conclusions are controversial.

Brooks says that, even accounting for religious giving, conservatives give more than liberals to charity.

Brooks believes that he has uncovered a value problem in American society. His writings work his findings into supportive positions in this regard.

One of the things he says is that government should not move to replace charitable giving. That is; a government program to feed the hungry should not replace charitable soup-kitchens as this causes giving to be reduced.

But if giving is insufficient to provide for the hungry should people starve just so people will continue to give?

Brooks looked at broad categories of giving and then made his own interpretations. Giving is an important cultural norm. But it is probably true that the only people who give till it hurts are taxpayers.