as a koppelman to the series, "first ladies," it is available as a hardcover or e-book. >> next, a lookt some of this year's commencement speeches from colleges around the country. first, former president george w. bush at southern methodist university. then pfizer judge susan webber wright speaking to graduates of the university of arkansas law school. that is followed by mellody hobson's speech at the university of southern california. mitt romney delivering commencement remarks to the graduating class at >> george w. bush addressed the graduating class at the other methodist diversity in dallas. it it was his first commencement speech since leading -- leaving office. this is 15 minutes. [applause] george bush: thank you all. thank you. thank you very much. ipresident turner thanks. members of the board of trustees , faculty, staff parents, most importantly the class of 2015. i thank you for your warm welcome and i appreciate the invitation to be with you.

dan: we send people a koppelman. one group is getting a complement.getting a voucher for pizza. one group is getting $25 and one group gets nothing. which of those four performed best stephanie:? stephanie: i'm going to say complement. erik: complement. dan: this is a trick question. this is what happened. on that first day of the first shift, all methods worked better than nothing. they were all identical he better. this is what happened. on the second day, there was no bonus involved but things happened. the people who got money on the first date worked harder on the second day. they were worked hard and today there is more money. they went down and then they slowly went back to the control conditions. they lost about 5% of productivity giving people money. that is the thing they were doing it generally. your intuition was wrong. you created a bonus because you thought it would help, clearly it did not help and it hurt your performance. let us change the compensation for top management. maybe your intuition about that is wrong as well. what happened

i do not mean that as a backhanded koppelman.epublicans deserve credit for working with democrats and security professionals to reach a common ground. the hard work has been done. we also can surmise from the vote there is similar support in the u.s. senate. we just need to allow members of the senate the legislation to come up for a debate. they need to allow that to happen before the deadline on sunday. >> can you assess what have been called inconvenient facts, the presidents own view panel could not find an instance in which a terrorist threat was for -- thwarted. if it is so important, why has it not stop anyone? mr. earnest: our security professionals who deal with this on a daily basis are working to keep us safe and say these are authorities are programs that benefit their efforts. so the details of that, i refer you to them. they can speak to that more effectively and with more detail than i can. all i can say is that the president listens carefully to his national security team for advice about what is necessary to prot