What are the predictors of nonprofit association members' supportive behaviors?

This study investigates the factors of members' supportive behavioral intentions to donate and recommend membership to others in the context of engineering professional membership associations. Using data collected from 3,464 members across three engineering professional membership associations, this study found that age, past donation experience, personal and professional benefits, gender, income, and longevity in the field were significant factors to determine giving intention, while personal benefits, professional benefits, past behaviors (donation and volunteering), and longevity in the field were predictors of membership recommendation intentions of engineering professionals.