"When a man helps a colleague, the recipient feels indebted to him and is highly likely to return the favor. But when a woman helps out, the feeling of indebtedness is weaker. She's communal, right? She wants to help others. Professor Flynn calls this the "gender discount" problem, and it means that women are paying a professional penalty for their presumed desire to be communal.10 On the other hand, when a man helps a coworker, it's considered an imposition and he is compensated with more favorable performance evaluations and rewards like salary increases and bonuses. Even more frustrating, when a woman declines to help a colleague, she often receives less favorable reviews and fewer rewards. But a man who declines to help? He pays no penalty.11 Because" --