It’s ‘cowardly’ not to take a stand on gun control: Yale management guru By: CNBC.com News February 28, 2018 at 17:15 PM EST It's "cowardly" not to take a stand on gun control, says Yale management guru Jeffrey Sonnenfeld. Read More >> Related Stocks: Avis Budget Group Delta Air Lines Dick's Sporting Goods Inc FedEx Corp Hertz Global Holdings Inc Merck & Co MetLife United Parcel Service