It's a dilemma facing more and more brands: should you sell your goods on Amazon? It's the most visited e-commerce platform in the U.S. and the dominant retailer in 28 other countries. But that reach comes at a price. There are downsides like costs, competition, and lack of data. Ayelet Israeli is an associate professor at Harvard Business School and a coauthor of the HBR article "Should Your Company Sell on Amazon?" She talks through step-by-step how businesses can decide whether Amazon is right for them.