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Comment by mc32 | Hacker News Reader

Indeed true. Even more efficient is when people can wait a few days and let Amazon bundle your orders and deliver on a designated day.

That said people don’t typically get in a car to buy one thing -though obviously sometimes they do. On average though their trips will be for multiple things. I still think even without using designated delivery days Amazon deliveries are more efficient than individuals going out to buy things independently.

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I was zeroing out the amount purchased: The comparison is the customer picks up one item vs. Amazon delivers one item, or the customer picks up 12 or 20 things vs. Amazon delivers the same amount.

I'd still love to see data.

The problem with environmental impact is really a consequence of subsidized energy costs, including the externalization of environmental cost. If the consumer and Amazon paid the actual cost of fuel, they would make valid economic and environmental choices and we wouldn't need to figure it out like this.

I've always wondered why I don't see passed on savings for the "amazon day" thing. It's gotta be way better for their logistics to deliver bulk orders, or pick a standardized delivery day for each neighborhood or something. Why do they only offer a single dollar of credit for choosing it?

I don’t know how much they are saving. On the one hand they save a stop (they aren’t saving a van as there are likely already vans delivering near by). on the other they have to hold on to stock longer waiting for things to all be ready. It costs money to store things

I get 6% back instead of 5% with my Amazon card which is more than enough to incentivize me in many situations.

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