the authors of this book have an explanation. it is called top dog, the science of winning and losing and it says much of it has to do with how women handle risk and guilt. authors ashley maryman and po bronson are with me now. welcome. so much to work through. first, ashley, with you. competition, give me one main example here where women and men differ when it comes to just blood, sweat and tears at work over one another. >> well, you know, the story is that women are less competitive than men. but the research doesn't support that. what the research shows is that women are more concerned with winning than men. men will -- >> women are? >> yeah. men will compete if they have a chance. women refuse to waste time with losing. so women are good at figuring out the odds, men are good at ignoring the odds. in a workplace environment, women tend to be 7.3% more accurate as wall street