Most big technology companies are competitor focused. They see what others are doing, and then work to fast follow. In contrast, 90 to 95 percent of what we build in AWS is driven by what customers tell us they want.

We've done price elasticity studies, and the answer is always that we should raise prices. We don't do that because we believe, and we have to take this as an article of faith, that by keeping our prices very, very low, we earn trust with customers over time, and that actually does maximize free cash flow over the long term.

One of the things we don't do very well at Amazon is a me-too product offering. So when I look at physical retail stores, it's very well served, the people who operate physical retail stores are very good at it...the question we would always have before we would embark on such a thing is: What's the idea? What would we do that would be different? How would it be better? We don't want to just do things because we can do them...we don't want to be redundant.

Our judgment is that relentlessly returning efficiency improvements and scale economies to customers in the form of lower prices creates a virtuous cycle that leads over the long term to a much larger dollar amount of free cash flow, and thereby to a much more valuable Amazon.com.

I don't think that you can invent on behalf of customers unless you're willing to think long-term, because a lot of invention doesn't work.If you're going to invent, it means you're going to experiment, and if you're going to experiment, you're going to fail, and if you're going to fail, you have to think long term.

Focus on cost improvement makes it possible for us to afford lower prices, which drives growth. Growth spreads fixed costs across more sales, reducing cost per unit, which makes possible more price reductions. Customers like this, and it's good for shareholders. Please expect us to repeat this loop.