Edit this Published in Freakonomics Radio The Power of the President -- and the Thumb Listen 57 min Queue Download this audio Want to embed this player? Use the code below. More info. <iframe width="600" height="130" frameborder="0" scrolling="no" src="//www.wnyc.org/widgets/ondemand_player/wnyc/#file=json/180169"></iframe> Share on Facebook Share on Twitter Email a Friend How much does the President of the United States really matter? And: where did all the hitchhikers go? A pair of "attribution errors."