It was the best of times for Best Buy and the worst of times for Toys “R” Us in the news this week. Years ago, analysts expected Best Buy to go the way of Borders, a bookseller disrupted by Amazon’s online magic. Instead, Best Buy has held up well against Amazon. It not only avoided the fate of electronics chains that did go bankrupt (e.g., Radio Shack and Circuit City) it’s a stock we all should have purchased. Toys “R” Us, on the other hand, announced its bankruptcy this week. Economists love natural experiments, and the Best Buy versus Toys “R” Us comparison offers one for retail markets. Why did Best Buy succeed where Toys “R” Us failed? What lessons can we glean? The key takeaway: You cannot beat Amazon at its own retail game. You must win at a different game. Toys…