Daring to Lead study[links to a pdf]: A study by Compasspoint Nonprofit Services and The Meyer Foundation of executive leadership at community-based nonprofits might be of interest to you. It is "based on nearly 2,000 surveys ... [and] provides current data on executive turnover, compensation, career plans, and retirement. It also explores leading causes of executive burnout--in particular, widespread frustration with boards of directors and funders."
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