The British Gas option would have two different tariffs, but more than two different prices.
However, there would be different prices charged dependent on factors such as how customers' paid.
Awkwardly, this leaves retailers selling the same product at different prices online and in their stores.
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Having two different prices for the exact same product is not sustainable in a free market economy.
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Their prices will rise, and there will be two quite different prices of the same food products.
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One way stations are beefing up margins is by charging different prices for cash and credit purchases.
At its 42-acre fish farm the company offers visitors a range of tours with different prices and perks.
There's nothing wrong with offering different prices to different shoppers if that's being done "to reward good customers, " Alper said.
This is terrifying stuff when you start to think about Verizon charging different prices for different quality of service on its network.
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Warner Bros. is balancing its home entertainment revenue streams by creating different times at which a product is available at different prices.
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And in this case, Amazon is leaving it up to customers to speculate about why they're being charged different prices, he noted.
The person may own hundreds of shares of the stock, with groups purchased in separate lots at different times, for different prices.
They change the bodywork, fit different engines, then charge wildly different prices for what is, at heart, very much the same car.
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Flights of the same time and distance can have radically different prices.
In March last year, the ECJ ruled that it was no longer legal for insurers to charge different prices depending on gender.
For years, agreements that retailers have signed with third-party payment processors prohibited merchants from selling products at different prices depending on payment method.
Only now are Korean brokers beginning to mimic American firms, by offering specialised services, and charging different prices to different sorts of customer.
It will offer various Web shows at different prices: free for the basics, and more for the equivalent of the director's cut and extras.
Higher insurance costs had been predicted, as a result of the ban on different prices for men and women which starts on 21 December.
But the benefits are not: the value of safer food is hard to quantify and reasonable people may put widely different prices on it.
Two shoppers with loyalty cards, identical except for their past purchasing habits, might receive two different prices for the same product at the same time.
Abolishing patents would more or less halt progress in pharmacology, but there is a strong argument for charging different prices for drugs in poor countries.
The huge range of items at different prices meant products found their way into budget stores like Target as well as dearer ones like Bloomingdale's.
Being charged different prices for the same goods may irk people.
Two adjacent countries grow a largely indistinguishable crop but offer farmers different prices: then people are shocked, shocked, that smuggling takes place across the border.
"I think there are completely legitimate reasons to charge different prices for different services and that one should be specific for what those reasons are, " he added.
Two neighboring buildings, for example, can be worth very different prices, depending on when leases expire, the credit quality of their tenants and the age of the buildings.
Nicholas Economides, of New York University, says that when firms have a measure of market power, they can engage in price discrimination, charging different prices to different customers.
When Amazon offered different users different prices for DVDs back in 2000, it faced a major backlash but that was because it was a little too obvious.
"It is important we understand what control shoppers have over their profile and whether firms are using shoppers' profiles to charge different prices for goods or services, " he said.
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