![HBR IdeaCast show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/026/923/small/hbr-ideacast.jpg)
Summary: Roger Martin of Rotman School of Management, Paul Zak of Claremont Graduate University, Clayton Christensen of Harvard Business School, comedian Jerry Seinfeld, and HBR Editor-in-Chief Adi Ignatius respectively discuss customer loyalty, the neuroscience of trust, entrepreneurship in Africa, the source of innovation, and the new, hefty magazine. For more, see the January-February 2017 issue.