That's an interesting idea. I would have assumed that Amazon would be planning to use its own assets for "baseload" demand (to use power generation analogy) and

That's an interesting idea. I would have assumed that Amazon would be planning to use its own assets for "baseload" demand (to use power generation analogy) and rely on third parties to deal with spikes in demand. Doing so would result in a higher variance in 3rd-party utilization compared to its mean. That is, if Amazon currently needs 50 planes' worth of capacity on average from third parties with a standard deviation of 10 planes' worth, and they decide to acquire 30 planes of their own, then it would mean residual demand for third parties would be 20 planes on average but still a standard deviation of 10 planes' worth.