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Supply curves are literally predicated on one price for a market.
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If by this you mean that standard supply-demand economics can't model price discrimination, which is what's going on here, that's not correct. See, for example, Chapter 10 of David Friedman's Price Theory, where he models price discrimination using supply and demand curves just fine. In terms of this kind of analysis, price discrimination is a way for sellers to try to transfer as much as possible of what would otherwise be consumer surplus, to themselves.
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And the buyer tries to pay as little as possible. Negotiating is a skill well worth learning (lots of books on it).
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This discussion is perverse. Negotiations require leverage, which the average grocery buyer in the USA does not have. As a society we don't benefit from min-maxing absolutely every opportunity.
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[flagged]
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Government stores are fine then?
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You decide if a price is worth it to you. The LSD is just an aggregation of that.
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Not sure that is applicable here.

The practice — supported by artificial intelligence and known as dynamic pricing or surveillance pricing — can lead to two consumers paying different amounts for the same item from the same retailer, at roughly the same time. If a store knows, for example, that one of those customers lives in a wealthier neighborhood, it can charge that person a higher price.

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That has always happened. If you go to a flea market, do you think the seller isn't going to bump up the price if you look prosperous or desperate? Do you think the roof replacement company isn't going to make a bid based on how wealthy or poor your neighborhood looks? Or you need a new water heater? Do you think grocery stores in wealthy neighborhoods charge more?

We live in a market economy. If you don't like the price, us apes have learned to say "no".

BTW, if prices are set by the wealth of the customer, then the poor ought to be getting a better deal. Isn't that a good thing?

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At the flea market you can haggle. Are you saying we should all have to haggle with the harried checkout person over the price of milk ever time we shop? Or everything is self checkout and you don't haggle but then choose whether you accept the price or not?

As with many things in technology, it's not about the raw concept, it's about the automation of it and inability to appeal to a human. Haggling face to face is human. Having a bot decide what you are paying (take it or leave it) is asymmetric with the benefit going to the corpo.

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I've never encountered or heard of a grocery store that didn't mark the prices on the shelves.

> asymmetric with the benefit going to the corpo

You have the power to say "no". The only transactions you are forced into are the ones dealing with the government or the mob.

> inability to appeal to a human

I was stonewalled by a gigantic corporation the other day over a substantial sum of money. I googled the name and address of the CEO, and sent him a hand written polite letter. My issue was promptly resolved.

I know the CEO didn't read the letter. But he has staff that does, and hand writing a letter will get their attention, as well as reminding them that I was a loyal customer.

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Better that you stick to promoting D instead of defending price gouging.
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The inevitable result of government setting prices is some combination of:

1. shortages

2. gluts

3. black markets

It doesn't matter what your or my opinion on it is, any more than having an opinion on F=ma. The Law of Supply and Demand is always in play.

There are thousands of years of history on this.

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This isn't government setting prices. It's just government outlawing a certain form of price discrimination. It's forbidding sellers from transferring consumer surplus to themselves by charging a higher price to customers that would be willing to pay a higher price for the same item. But the item is still available to buyers that wouldn't want to pay the higher price--at the lower price. The grocery stores aren't going to raise the overall price to compensate for losing the ability to price discriminate: that would result in less profit for them. Whether they will try to find other ways of increasing their profit over what they get when every customer pays the price that's equal to their marginal cost, is a different question.
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> This isn't government setting prices. It's just government outlawing a certain form of price discrimination.

I.e. the government is regulating prices, yet another attempt going on for 4,000 years of trying and failing to repeal the Law of Supply and Demand.

> The grocery stores aren't going to raise the overall price to compensate for losing the ability to price discriminate: that would result in less profit for them.

Allow me to explain how prices are set:

Consider an appliance store. They want to sell refrigerators. What do they do? They have 3 refrigerator lines - the stripper, the midline, and the lux. The purpose of the stripper is that is what they advertise, to bring customers into the store. The purpose of the midrange is to upsell those who come for the stripper, as they think the extra features are worth it. The lux is sold to the wealthy customers who just want to buy the best. (Not having a lux is means the retailer is throwing easy money away.)

The moneymaker is the midrange.

You'll see the same thing in the grocery store. The store advertises the price of milk, which is likely at below cost (called a "loss leader"). People come to buy the milk, which is always on the back wall of the store. The customer has to pass by all kinds of things to get to the milk, and they'll buy it. The most overpriced stuff will be next to the checkout line.

Cheeses come in cheap, midrange, and lux, too.

There's been an extensive amount of research on exactly how to set up the store to maximize profits, which is necessary as grocery stores have razor thin margins.

BTW, the article is paywalled. I have no idea how a grocery store is going to adjust prices at checkout, as the prices are marked.

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> BTW, the article is paywalled. I have no idea how a grocery store is going to adjust prices at checkout, as the prices are marked.

Many stores are rolling out electronic price tags on the shelves, which can be rapidly updated wirelessly [1]. They could probably do the price adjustment there. I'd assume they wouldn't want to make it too blatant, which would be a challenge.

[1] https://www.businessinsider.com/walmart-digital-price-tag-sh...

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If it adjusted the prices as someone approaches, I suspect customers would soon notice it.

I'm not going to order food at a restaurant if the menu has no prices on it, even if I'm a zillionaire.

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Somehow we did just fine without real-time per-customer price discrimination.
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As I've pointed out elsewhere in this thread, it's been going on since the first fruit stand thousands of years ago.
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