Bekkers, R.

donation study contribution journal effect organization mechanism bekker donor philanthropy relationship people amount research value survey psychology economic review wiepking sector education benefit income behavior charity respondent difference solicitation household evidence other result netherland experiment increase paper money literature university level price altruism accuracy behaviour tax journal model number self-report reputation analysis group alumni church marketing american efficacy personality request brook report field beneficiary article science religion church attendance prosocial steinberg variable response individual cause survey study kwf database sector marketing attendance sociology factor organisation