external In the Media November 26, 2021 John Rosen, a practitioner in residence in economics, talks about the supply chain issues taking a toll on Black Friday shoppers. https://sanfrancisco.cbslocal.com/2021/11/26/bay-area-shoppers-looking-for-deals-find-black-friday-is-not-what-it-used-to-be/ john-rosen news-all news-in-the-media year-2021 month-november name-john-rosen