Humor plays an important role in building identity, yet charities and foundations don’t seem to laugh at themselves very often, writes Gabriela Fitz, co-director of IssueLab, an online publisher of nonprofit research, as noted on The Chronicle’s Give and Take review of the best nonprofit blogs.

Plus, from Friday’s round-up:

• Criticism of Hollywood’s volunteerism week.

• Huffington Post’s search for “the biggest game changer in philanthropy.”

• A pitch to create new measurement tools.

• Opinion: Why capping the charitable tax deduction would hurt giving.

• How two foundations were able to diversify their boards.