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The Decoy Effect


There's a chance that you haven't HEARD of it, but you've definitely seen it, and have almost certainty fallen victim to it. You've noticed that there's something senseless about the way products and services are priced, but perhaps didn't know the term or why all manner of businesses price things this way. Introducing The Decoy Effect:

So you go to the movies with your date, and on your way to the theater, you stop at the concessions bar to pick up a tub of popcorn. Lets say you see only two options: a small bag for $3 or a large tub for $7. Which one do you choose?

More often than not, you'll choose the small option for $3. You'll reason to yourself that popcorn is not healthy anyways with the butter in it, so let's get the smaller one; plus it's more than 50% cheaper. $7 feels like a huge rip-off, especially for such an unhealthy snack.

But what if we were given another option...? A medium for $6.50

This suddenly changes everything. You ignore all the health and financial reasoning behind not buying the $7 option that you had earlier. You'd say: “For only 50 cents, I get a large over a medium!” And all of a sudden $7 provides you a great value. Bam!, you're sold

This is the Decoy Effect and you just fell victim to one of the very popular marketing ploys in the world. Small businesses to large companies, all of them use decoys in their pricing to alter your decision making in order for you to spend more. Some more examples:

iPhone Ludicrous 16GB: $1000
iPhone Ludicrous 32GB: $1800
iPhone Ludicrous 64GB: $2000

Big Mac: $10
Big Mac + Coke: $14
Big Mac + Coke + Chips: $15

NY Times 1 Month Subscription: $3
NY Times 3 Month Subscription: $9
NY Times 12 Month Subscription: $20

What are your thoughts on this? Have heard about this Decoy Effect before or noticed it? Is it ethical? Is it fair game because "we are adults and should be able to make logical/informed spending decisions?" Does it expose a form of profiteering (ie. how can it cost $800 to double the storage on an iPhone Ludicrous to 32GB, yet it's only $200 to double that to 64GB)? Or maybe you're indifferent? Does knowing about this make you want to think twice about your future purchases?


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You confuse “marketing,” which means “strategy to promote,” with “selling,” which means “getting the customer’s money.”

Marketing, advertising and selling are three separate, but related, concerns. I know we’re on the internet, but let’s still acknowledge that language matters.

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The only thing I am confused about is how you surmised that I am confused about marketing and selling.

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I’m confused that you’re confused that he’s confused that your confused (I think).

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I am DONE being negative! Since pro is the opposite of con y'all can be negative-Nancies and be CONfused but I chose to be PROfused henceforth.

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I will also adopt profused, henceforth 🍻👍

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Damn straight! And there will no longer be any more DEfusing of situations either. "De-" is a very negative prefix and we are not a bunch of negative-Nancies, so we will be INfusing or REfusing situations going forward.

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I was aware of it. I did not know it had a name. I don't believe I fall victim to it because I'm so old I can still do at least a little mental arithmetic.

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What do you mean you've never fallen victim to it? Because I believe that knowing mental arithmetic makes us even more susceptible to falling for the decoy effect. Take my NY Times Subscription from the OP for example:

NY Times 1 Month Subscription: $3
NY Times 3 Month Subscription: $9
NY Times 12 Month Subscription: $20


Knowing mental arithmetic I know it'd cost me $36 to subscribe for 12 months if I did so on a month-to-month basis; therefore buying 12 months upfront for "only" $20 seems like a "bargain." However, buying the 12 month subscription, as logical as it seems, means I have just fallen for the decoy effect. Which of these three subscriptions would you choose?

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oops, you're quite correct. A bit of mental arithmetic is often useful to spot the best value in items that seem to be deliberately packaged to cause confusion but this is actually a different effect (which I still believe I don't fall for).

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I was also aware of it. Think I saw a bit on QI about this and other pricing tricks.

In the UK, we price things at, say, £4.99. (It'd more commonly be $4.95 in the USA, right? Same trick, in any case.) And this is partly to make it more difficult for a till operator to pocket the money rather than running it through the till -- but it also has a psychological effect on a lot of people.

And I've seen it in operation. I've heard customers saying 'Well, it's only four pounds' -- when it's £4.99. There's a strange cognitive bias that causes people to read the first number as the important one rather than rounding up. The pricing folk take advantage of this.

I don't think I've ever fallen for the £.4.99 pricing 'trick'. £4.99 is definitely £5 to me... But I've almost certainly at some point fallen for the Decoy Effect or one of the many other tricks marketers and advertisers have in their arsenal. After all, it isn't a multibillion pound industry for nothing.

I accept that some people are more susceptible than others, but people who imagine themselves entirely immune are probably only kidding themselves.

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This business of pricing things with .99 at the end has been wildly suspicious to me for many years. Where I live 1c, 2c, and 5c, coins are obsolete. If you try to include any of these coin denominations during your transaction the shop worker will say they don't accept them. And yet they will still price a Coke or Snickers bar at $2.99 or $3.95 or whatever. They don't give you your 1c or 5c change, and no rational person would ever demand such chump change. So when you add these 1c and 5c over billions of purchases each year, that translates to millions, if not billions, of dollars of untaxed revenue that these retailers are able to pocket.

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Wow. That really exposes it as a bit of a trick, doesn't it? Or even a scam under those circumstances.

I'm sure that'll happen here soon enough too. The idea of discontinuing the one pence coin gets wheeled out from time to time. And, yeah, I can well imagine the pricing wouldn't change afterwards.

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This is what blows my mind about this practice. As much as we all hate and are exhausted by our respective governments' incompetence, we can all agree that the one department in our governments that somehow always does their job is the revenue service. So there can be no way that Average Me has noticed that when you pay $99.99 for something and don't receive that 1c change you're due it's literally a form of tax avoidance/evasion. Maybe someone here understands tax better than me and can explain why the IRS or any other revenue service allow this practice?

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The advertising industry operates by deception. If you think about it, the menu board at the concessions bar is a form of advertising; it displays a list of products and their prices. The goal is to sell the smallest amount of popcorn at the highest price. It's called profit margin.

There's another trick used by retailers related to this one... placing items that will trigger impulse buying at the check-out lines. As customers are waiting in line they have time to peruse the displays, which are comprised mostly of soft drinks, single-serving bags of snack foods and candy bars. A few practical items like batteries are usually included, which in itself isn't a bad thing because it may remind someone that they are almost out of AAA batteries at home. But the food items are tempting enough to induce a lot of people to add something that wasn't on their shopping list to their carts. Customers are spending more for a smaller amount of food; it would have been cheaper in the long run to have purchased the larger bag of chips/crisps than the individual serving size. The manufacturers love this.

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One of my favourites that I heard back in the day:

In supermarkets that market themselves as low-cost (KwikSave when I heard about it. Lidl and Aldi these days), they have these signs with stick-on, reusable letters: there are misspellings, some of the letters are missing or wonky... and that's all deliberate. It looks cheaper, which psychologically reinforces the 'brand', leading people to think that the products are cheaper.

And a similar thing: in Primark, the 'fast fashion' retailer, you'll often find piles of clothes in the wrong place. Again: deliberate. For the same reasons: emphasising inexpensiveness through making the environment look a bit cluttered and downmarket.

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The goal is to sell the smallest amount of popcorn at the highest price. It's called profit margin.


I'm not sure about this. It feels to me like the goal is simply to get as much money out of your pocket as possible, irrespective of the popcorn amount. The popcorn amount is almost inconsequential in the OP example because $3 gets you small, then $6.50 gets you medium (which is usually twice the size of small).... and yet large (which is usually twice the size of medium) costs you a meager 50 cents extra. They WANT you to buy the large. That's where the money is. Somehow.

it would have been cheaper in the long run to have purchased the larger bag of chips/crisps than the individual serving size. The manufacturers love this.


And this this why I asked if other MC users feel this is ethical or if, as adults, we are fair game.

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Maybe I should have worded it differently. Perhaps "smaller portion at a higher price" would have better conveyed my point.

Assuming the large popcorn tub is twice the size of the small, you would have these two options:
• Sell 50 units of large popcorn for $7 and make $350.
or
• Sell 100 units of small popcorn for $3 and make $300.

After doing the math it appears they are not making any more money by selling the small tubs for $3. Now if they were charging $4 for the small tub they would be making $400. That's more likely to be what they would charge. I haven't been to a theater in years, so I don't know what they charge in real life.

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The figures in my OP are still relevant but let's use a fast food joint as an example. Typically they'll charge you, say, $5 for a burger. Add fries and it's $6. Add a Coke/Pepsi and it's $6.50. In this example, which is replicated in fast food places all over the world, maximum profit SHOULD come from people who buy just the burger for $5. And yet the pricing indicates that the restaurant actually encourages you to buy the burger, fries plus drink for a measly $1.50 extra... As though there is more profit from selling the full meal than just the burger. McDonald's is especially guilty of this, even with their pricing when it comes to medium, large and supersize meals.

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It figures MuckDonald's would be one of the guilty parties. Another reason why I don't do business with them. Their food is garbage anyway.

They are obviously overcharging for the fries and the drink if they are encouraging customers to add it to the meal for only an additional $1.50. I know they make a big killing on the soft drinks by charging $2.99 or whatever it is for a large cup. I don't have the exact figures, but a soft drink only costs them a few cents and they turn around and sell it for dollars.

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"They WANT you to buy the large. That's where the money is. Somehow."

In the case of popcorn, it costs them next to nothing. A half cup of popcorn kernels makes about a gallon of popcorn, more or less depending on the exact type of kernels they use (some kernels pop into larger flakes of popcorn than others do; movie theaters tend to prefer the highest-yield varieties for obvious reasons).

Suppose it costs them 5 cents to make a quart of popcorn (small), 10 cents to make 2 quarts (medium), and 20 cents to make a gallon (large), obviously the biggest profit comes from selling the large, because the selling price increases by dollars while their cost only increases by several cents. Using your hypothetical prices, a small gives them a profit of $2.95, a medium gives them a profit of $6.40 and a large gives them a profit of $6.80.

Popcorn is a movie theater's bread and butter; it's their highest-profit item and their main source of profit (more so than the profit they get from selling movie tickets, much of which goes to other companies higher up the ladder). Soda comes next, which another easy way for them to convert a few cents into a few dollars on each sale.

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The popcorn example is very specific. We can use any product that has three varieties, be it cars, televisions, computers, food products, clothes, etc. A computer example:

Core i3 CPU + 2GB RAM + 1TB HD - $2000
Core i5 CPU + 4GB RAM + 1TB HD - $3000
Core i7 CPU + 8GB RAM + 2TB HD - $3500

Across many industries and countless more businesses there's a "cheap" or reasonably priced option that might lack something you want; and there's an "expensive" option that has MORE than what you're looking for. But instead of having an intermediate product that's priced halfway between the two, the intermediate product (ie. the one that you want) is intentionally priced almost as much as the expensive or top-of-the-range option, which is what you end up buying because it makes economic sense even though that's not what you wanted to begin with.

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Personally, I think it's not ethical. That's why I simply don't buy concessions in theaters. If $3 popcorn isn't healthy then $6.50 is twice unhealthy. The healthiest would be the $0 popcorn (a.k.a. no popcorn at all.)

But I don't really care about healthiness of popcorns. I just don't have the unsatiable urge to snack in a theater. I can do with one, I can do without. If the price isn't fair according to me, I simply refuse to buy one.

I also personally think pricing with .99 is also unethical. I would like the practice to be outlawed.

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But this doesn't apply only to popcorn. It applies to so many products you interact with on a daily basis: phones, cars, appliances, food, software, computers and on and on.

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All of those are also unethical in my opionion. But I also understand why it's not outlawed. So I simply buy what I want at the price I deem fair.

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I dunno. I'm not the best judge of ethics but I will say it's a kinda...sleazy....practice, for lack of a better word. However, no matter how shady a practice it is, I think it's lawful. You just have to educate the public on how to make better choices with their purchases, I guess.

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Yeah, sleazy is probably the better word. What I don't understand is why it's lawful. We can take the iPhones in the OP for example:

iPhone Ludicrous 16GB: $1000
iPhone Ludicrous 32GB: $1800
iPhone Ludicrous 64GB: $2000

PS, I am not American, that's why all the prices in this thread make no sense, but the underlying principle still stands

Looking at the above, deductive logic means that if a 16GB iPhone is $1000 and a 64GB is $2000, then logically a 32GB iPhone should be $1500. The fact that it's $1800 indicates, to me at least, that one or more of these models is overpriced. Overpricing is profiteering. And profiteering is supposed to be illegal. So why the Decoy Effect is lawful isn't clear to me.

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I'd like to know why the Big Mac is $7 here, and the Mcdouble is $2.50. They're the same thing! Mcdonalds used to be a cheap place to get a quick meal. Now I can get better food, at a lower price at In and Out Burger.

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MuckDonald's food was always garbage and it has gotten worse. Their service is terrible. I haven't done business with them in years.

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I was aware of it and it's imo quite unethical.

Also, I didn't know Ludacris was releasing an iPhone, but I'm proud of him for spelling it correctly for the kids, even if it is overpriced.

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