How tough is it to infuse a retail website with entirely new products every day? Very. Nonetheless, that’s what Zulily, an ecommerce site that sells unique retail brands primarily to women, did when it went live in 2010. Ultimately, Zulily sold for $2.4 billion in 2015. Hear Darrell Cavens, founder and former CEO of Zulily, Spencer and Harvard Professor Jeffrey Rayport discuss the why behind Zulily’s astonishing success and some granular lessons learned born of a company that grew incredibly big incredibly fast.