Syllabus map
Everything on the class test, and where it is answered
Module 7, Smith chapter 5, in three parts. Open a part to see what sits under it; every line is a link to the section that covers it.
1Why Psychology Moves Price8
2Perceptual Challenges5
3Prospect Theory and Related Effects10
Why Psychology Moves Price
Smith, Chapter 5 · part 1 of 3
Influencing price acceptance
How customers judge value and price is shaped by many factors, and a lot of them are psychological, some probably rooted in evolution. The module's stance is practical: rather than trying to make buyers more logical, it is usually more efficient to work with the way they already think. That means four jobs:
- Understand the decision biases in purchasing behaviour
- Find ways to reduce psychological dissonance
- Understand the limits of pricing power
- And so make it easier for customers to decide to buy
The brain as a predictive machine
Neuroeconomics suggests the brain constantly predicts what to expect. Shown a chair you have never seen, you still guess its function, weight and rough price, from very little information. The circuits doing this turn information into impressions, preferences, judgements and predictions, and therefore into willingness to payThe most a customer is prepared to pay for something.The psychological effects work by shifting it.. People are cognitive misersA description of people as saving mental effort wherever they can.Hence the reliance on heuristics.: they save mental effort by relying on heuristicsMental shortcuts people use to decide quickly with little effort.They save effort but bias judgements in predictable ways., mental shortcuts, to decide faster.
It is your brain too. Use yours, don't fix theirs. Some effects lower price sensitivityHow strongly a customer's buying reacts to a change in price.Every effect in this module either raises or lowers it. and can be steered by the firm, which builds pricing power. Others warn the firm where a pricing practice will backfire.
The seventeen effects
The whole module hangs on one map, repeated through the slides. Learn the three groups first, then the effects inside each.
True economic costs
The first four effects look psychological but are really rational. Each comes from a hidden cost, usually an opportunity costThe value of the best alternative given up, such as the time spent shopping.The true economic cost effects all rest on it., that a sensible buyer would weigh.
1 Shared cost effect
Price sensitivity falls when the customer pays with someone else's money. A business traveller reimbursed by the company cares less about the fare; that is why airline loyalty schemes let airlines charge a little more, since the firm pays but the traveller chooses. Rebates work the same way to a smaller degree, because part of the price is effectively paid back.
| 1 | Own money, on themselves | Careful about getting the most utilityThe satisfaction or benefit a person gets from something.Classical economics assumes people maximise it. for each unit of money spent. |
| 2 | Own money, on someone else | Still price sensitive, but now trying to please the recipient and get the satisfaction of giving. The meaning of utility changes. |
| 3 | Someone else's money, on themselves | Focused on benefits, and much less price sensitive. |
| 4 | Someone else's money, on someone else | Buying for a business, say. Without oversight and the right incentives, neither price nor benefit sensitive. |
The industrial lesson: because business purchases spend other people's money, they involve several decision makers and several decision criteria.
2 Switching costs
Economic switching costs are all the costs, direct and opportunity, of moving from one supplier to another. They arise from product-specific investmentsMoney, time or effort a buyer puts into one supplier's product, which is lost if they switch.They create switching costs and lower price sensitivity for existing customers. the buyer has made, which can be monetary or psychological. The key line: product-specific investments decrease price sensitivity for existing customers.
| Complementary goodsProducts bought to work with something already owned, such as a dock for a music player.Once bought, they make the buyer more likely to stay with the same brand. | Buy an iPod, then a docking station for it. The dock makes the next player likely to be an iPod too. |
| Learning | Time spent mastering Dreamweaver would be lost by moving to Pagemaker. |
| Engineering costs | A chip designed into a product: changing it means re-engineering, re-certification and other direct costs. |
| Brand loyalty | The purely psychological cost of leaving a brand you trust. |
3 Expenditure effect
The bigger the price tag, the more it pays to shop around. Searching and comparing take time and effort that could be spent elsewhere. On an expensive item that effort is small next to the possible saving, so buyers compare hard; on a cheap item the effort stays the same while the saving shrinks, so they don't bother. Price sensitivity is higher when the purchase is a larger share of the budget. In business markets, a larger or more strategically important purchase draws more scrutiny and so more price sensitivity.
The effect is not always consistent. Told that a $39.99 microwave is $5 cheaper two miles away, more people make the trip than for the same $5 off a $499.99 TV. Prospect theoryKahneman and Tversky's 1979 account of how people choose between risky prospects.It explains where buyers break the rules of utility maximisation, which is where the pricing opportunities sit. explains why: $5 feels bigger against a small price.
4 Difficult comparison effect
Making products and prices hard to compare raises search costs and the buyer's uncertainty. That discourages switching and lowers price sensitivity.
| IncumbentThe supplier a customer is already buying from.The difficult comparison effect is often used by incumbents to defend market share against new entrants. vs new entrantA rival trying to take customers from the incumbent supplier.Entrants make the price comparison explicit, having no track record to trade on. | Incumbents blur price and benefits so switching takes more information gathering and feels riskier. Entrants do the opposite and make the comparison explicit. AT&T's base price plus a list of add-ons against Vonage's single flat fee is the textbook case. |
| Brands vs genericsUnbranded versions of a product, sold on the active ingredient rather than on a brand name.Branded and generic aspirin are chemically identical, yet the brand still earns more. | Branded and generic aspirin have chemically identical active ingredients, yet buyers trust the brand and pay more for it. The brand itself makes comparison harder. Whole Foods: Quaker Oats $3.49, its own 365 brand $2.99. |
| Size changes | In a Prague pub a large beer (0.5 L) costs 20 CzK and a small (0.3 L) 14 CzK. The small looks cheaper, but costs 4.7 CzK per decilitre against 4.0 for the large. A higher unit priceThe price per unit of measure, such as per litre or per decilitre.A change of pack size can hide a higher unit price behind a lower-looking price. behind a lower-looking price. |
- The four jobs, and why we work with biases rather than fix them
- Cognitive misers and heuristics
- The three groups of the seventeen effects
- Four funds of money and the sensitivity of each
- Switching costs: definition and four sources
- Expenditure effect and its caveat
- Three areas of the difficult comparison effect, with one example each
Perceptual Challenges
Smith, Chapter 5 · part 2 of 3
Effects 5 to 9 are purely psychological: no hidden cost explains them.
5 Price endings in 9s
If nothing psychological were going on, each digit would end a price about 10% of the time. Count real prices and 9 dominates by far, with far fewer 5s and 0s. The effect even reaches past the last digit. Of $24.99, $28.53 and $29.99, the lowest sells most, as theory predicts, but $29.99 outsells $28.53 even though it is dearer. That kink contradicts the downward-sloping demand curve.
| Meaning | A 9 ending signals a low or discounted price, which lifts demand. The flip side is that it can suggest lower quality, which is why galleries price in round numbers and poster shops end in 9. |
| Accessibility | Round prices ending in 0 or 5 are easy to store and recall, which makes comparison shopping easier. Odd endings are harder to remember, so they quietly reduce comparison and price sensitivity. |
| Encoding | We read numbers left to right and the left digit matters most. A busy buyer reads the first digit and drops the rest, so $9.99 registers as much cheaper than $10. This is the underestimation effectPerceiving $9.99 as much cheaper than $10 because the left digit is read first.Part of the encoding explanation for 9 endings.. |
| Framing | A 9 ending feels like a small discount off the next round number, a little gain that nudges the purchase. |
The old story that odd prices stopped cashiers pocketing exact change is discredited: it would make every odd digit common, not just 9. And the habit is cultural: post-Soviet Poland favoured 5s, and Japan and other Asian markets favour 8, a lucky number.
6 Fairness effect
The book's reason: the brain handles buying with the same circuits used for sharing within families and friends, so people bring expectations of fair sharing to every transaction. Breaking them can turn into public outrage, not just a lost sale.
7 Overconfidence in future economic efficiency
People buy some products expecting to behave a certain way later, and they are consistently bad at predicting their own future behaviour. The gym study: members on a $70 monthly plan went about 4.3 times a month, paying over $17 a visit, when a 10-visit pass cost $10 a visit. They were also 17% more likely to stay past the first year than annual members, despite paying extra for the right to cancel at any time. The cause was overconfidence in their own future self-control and efficiency.
8 Small pie bias
From negotiation research. Negotiators keep underestimating the size of the bargaining zoneThe range between the seller's lowest and the buyer's highest acceptable price.Small pie bias makes negotiators think it is narrower than it is.: they think they are splitting a smaller pie than really exists. So they overestimate the share of the surplus they are getting, and sellers settle for too low a price. They also tend to anchor their expectation near their own walk-away priceThe point beyond which a buyer will not go higher, or a seller will not go lower.Negotiators tend to anchor their expectation near their own walk-away price..
9 Promotional influence
What you say, and who you say it to, decide how good a price you can capture.
| Price-oriented promotion | Focuses on the brand and its price, typically in local circulars run with distributors. Leads to lower prices and higher price sensitivity. |
| Value-oriented promotion | Focuses on the brand and its features or benefits, typically national advertising run by the manufacturer. Leads to lower price sensitivity. |
- Why 9-endings contradict the demand curve
- Meaning, accessibility, encoding, framing
- When prices feel fair and unfair; necessity vs discretionary
- The gym study numbers
- Small pie bias and how to overcome it
- Price- vs value-oriented promotions, and the market-attracted effect
Prospect Theory and Related Effects
Smith, Chapter 5 · part 3 of 3
10 Prospect theory
Economics assumes people maximise utility in every transaction. Study after study shows predictable ways they do not. Prospect theory, set out by Kahneman and Tversky in 1979, tries to define the heuristics behind that predictable irrationality by asking how people choose among risky prospects. Since every purchase carries some risk, it explains many buying behaviours and so many pricing opportunities. Newer research links it to brain circuits shaped by evolution.
Which offer would you accept?
| Option 1 | Option 2 | |
|---|---|---|
| The offer | 50% chance of losing €10,000 | Losing €4,500 with certainty |
| Expected loss | €5,000 | €4,500 |
| What many choose | This one, the gamble |
The sure loss is cheaper on average, yet many people take the gamble. Facing a loss, people seek risk. That is a utility-maximising rule broken in a predictable direction, which is exactly what prospect theory describes.
The four findings
| Losses weigh heavier than gains | Losing a sum hurts more than gaining the same sum pleases. The curve for losses is much steeper than the curve for gains. |
| Inflection at the point of reference | Gains and losses are judged from a reference point, the perceived status quo. Because losses from it are avoided and gains above it discounted, buyers show a status quo biasThe tendency to stick with what you already have.It follows from losses weighing more than gains., replacing items with copies of the last one. |
| Diminishing sensitivity | We notice changes, not absolute levels. The gap between 3° and 6° is easier to feel than between 13° and 16°; a gain of 100 vs 200 feels bigger than 1,100 vs 1,200. The same holds for losses. |
| Risk aversion in the positive frame, risk seeking in the negative | Also called the reflection effectChoices about losses mirror choices about gains.People turn risk-averse for gains and risk-seeking for losses.: choices about losses mirror choices about gains. People avoid risk when it could cost them something pleasant and take risk when it could spare them something painful. Certainty makes losses feel worse and gains feel better. |
Prescriptions
The slides and the book each turn the findings into pricing advice. They overlap, so learn them side by side.
| From the slides | Why it works |
|---|---|
| Minimise pain, highlight gain | A $10 loss hurts more than a $10 gain pleases, so shrink the price in the buyer's mind and enlarge the benefit. |
| Bundle pain, unbundle gain | Two $5 losses hurt more than one $10 loss, and two $5 gains please more than one $10 gain. Charge one total; list every benefit separately. |
| Reframe pains as gains | People fear a 5% chance of missing out on $50 more than they welcome a 95% chance of getting it. Present the offer as something gained. |
| Price guarantees | Promising to match or beat the lowest price removes the buyer's doubt about getting the best deal, so they buy sooner and with confidence. Result: higher volume, and competition shifts away from price. |
| Manage the reference point | Put the product in the buyer's hands, as bazaar sellers do, to trigger the endowment effectValuing something more simply because you own it.Trials, test drives and putting goods in the buyer's hands all exploit it.. Or ask them to imagine the gain: what would you do with $5,000 more? Our offer saves you that over 12 months. |
| From the book book only | Why it works |
|---|---|
| Unbundle gains, bundle losses | Itemise the benefits; quote one single price. |
| Avoid surcharges, give discounts | A surcharge feels like a penalty, a discount like a gain. Raise the regular price and offer a cash discount rather than adding a card surcharge. |
| Shift pain to indirect costs | Time and effort hurt less than visible money. Making customers drive further, queue or assemble helps explain IKEA, Walmart and Ryanair. |
Organisms get used to steady states. The response to each further change gets smaller. Pain is more urgent than pleasure.
Effects related to prospect theory
11 Reference price effects
The prices a customer has seen before in a category set the price they now expect. Buyers often cannot remember what they recently paid, but whatever they do recall still shapes their willingness to pay, their reference priceThe price a buyer expects to pay, built from prices seen before.Promotions pull it down, so the later full price feels like a loss and demand drops.. Mostly studied in frequently bought consumer goods, it is expected to hold elsewhere too.
12 Endowment effect
People value something more once they own it. In the original experiments students were handed items at random and allowed to trade to get what they preferred, and far fewer trades happened than chance would predict.
The slide's mug study: decorated mugs worth about $5 went to a third of the group. Owners asked on average $7.12 to sell; non-owners would take only $3.12 instead of one. Simply owning the mug raised its value. This is why bazaar sellers put goods in your hands, car dealers push test drives, and trials work.
13 Anchoring
People set price expectations from information they meet early in the decision, and then find those expectations hard to change, since that means relearning or finding evidence the first impression was wrong. AnchoringFixing expectations on the first price heard and finding it hard to move off it.In negotiation the opening price becomes the anchor, so opening higher tends to close higher. strongly sets reservation prices. In negotiations the first price heard becomes the anchor, so opening higher tends to close higher.
14 Comparison set effect
The alternatives a customer is weighing shape the price they expect. Cheaper alternatives in the set pull expectations down; dearer ones push them up. So adjust the set towards a favourable group: compare a small car with a larger, pricier car, not with a motorcycle. And widen what is compared: a product with a higher upfront price but lower lifetime cost should be judged on total cost of ownershipThe purchase price plus the running costs over the life of the product.Judge on this when the upfront price is higher but the running costs are lower., not purchase price.
15 Framing effect
How a transaction is framed changes willingness to pay. The book's example: asked what they would pay for the same drink, people name a higher price if a friend is buying it at a smart hotel bar than at a grubby corner shop. Positive frames beat negative ones, so stress benefits over costs, and itemise the positives.
16 Order bias
Related to anchoring. The order in which prices are shown changes what people pick and what they will pay. With fast-moving consumer goods the highest average price came from presenting prices in descending order. Some studies found no significant effect for household appliances, but it is still suspected to hold beyond FMCG.
| Ascending order | Descending order |
|---|---|
| NAV at $39 | N360 at $79 |
| NIS at $69 | NIS at $69 |
| N360 at $79 | NAV at $39 |
The same three products: on average buyers choose a dearer one when the list starts from the top. It links to loss aversionLosses hurt more than an equal gain pleases.It is why the value function is steeper on the loss side, so several small losses bundled into one charge hurt less.: having seen the best option first, dropping to a cheaper one feels like giving up benefits. Hence the common practice in cars, mattresses and other durables, and in business markets too, of showing the most expensive model first and working down.
17 End-benefit effect
Price sensitivity depends on how much the product contributes to the end benefit the customer really wants. A product that delivers a large part of that goal meets lower price sensitivity than one that is merely ancillary. So promote the link to the customer's goal rather than the features. Nutrisystem sells not packaged diet food but weight loss, and beyond that looking better, feeling healthier and making a good impression at special occasions.
Summary
- Price cannot be optimised by numbers alone, without the qualitative influences
- Many psychological, decision-bias, neurological and behavioural effects shape how customers perceive prices, evaluate offers and choose between them
- Sales and marketing executives can use these effects to win price acceptance and capture more profit
- The gamble on the slide, and what it shows
- Four findings of prospect theory
- Draw the value function with A and B
- Five slide prescriptions and three book prescriptions
- The reference price formula and the promotion trap
- The mug numbers
- Anchoring, comparison set, framing, order biasThe order prices are shown in changes what buyers pick and what they will pay.Leading with the dearest option nudges the average choice upward., end-benefit: one line and one example each
Last 20 minutes
The lists you must be able to write out from memory
Cover the answer, say the list out loud, then open it to check. Everything expands when printed.
True economic costs (1 to 4)
- Shared cost effect
- Switching costs
- Expenditure effect
- Difficult comparison effect
Perceptual challenges (5 to 9)
- Price endings in 9s
- Fairness effect
- Overconfidence in future economic efficiency
- Small pie bias
- Promotional influence
Prospect theory and related (10 to 17)
- Prospect theory
- Reference price effects
- Endowment effect
- Anchoring
- Comparison set effectThe alternatives a buyer weighs shift the price they expect to pay.Cheaper alternatives pull expectations down, dearer ones push them up, so steer the set.
- Framing effectDescribing the same deal in different words changes what buyers will pay.Positive frames beat negative ones, so stress benefits rather than costs.
- Order bias
- End-benefit effectPrice sensitivity falls when a product supplies more of the benefit the customer really wants.Sell the goal rather than the features, as Nutrisystem sells weight loss rather than diet food.
Four funds of money
- Own money on self: moderate price sensitivity
- Own money on others: moderate, utility of giving
- Others' money on self: low price sensitivity
- Others' money on others: low price and utility sensitivity
Sources of switching costs
- Complementary goods
- Learning
- Engineering costs
- Brand loyalty
Difficult comparison: three areas
- Incumbent vs new entrant (Vonage vs AT&T)
- Brands vs generics (aspirin)
- Size changes (Prague beer)
Why prices end in 9
- Meaning
- Accessibility
- Encoding
- Framing
Gym study
- $70 a month, 4.3 visits, over $17 a visit
- 10-visit pass was $10 a visit
- Monthly members 17% more likely to stay past year one
Promotional influence: two paths
- The message: price-oriented raises, value-oriented lowers sensitivity
- The market attracted: advertising brings in more price-sensitive buyers
Prospect theory: four findings
- Losses weigh heavier than gains
- Inflection at the point of reference
- Diminishing sensitivity
- Risk aversion in the positive frame, risk seeking in the negative
Slide prescriptions
- Minimise pain, highlight gain
- Bundle pain, unbundle gain
- Reframe pains as gains
- Price guarantees
- Manage the reference point
Book prescriptions
- Unbundle gains, bundle losses
- Avoid surcharges, give discounts
- Shift pain to indirect opportunity costs
Reference price formula
- RP(t) = alpha x P(t-1) + (1 - alpha) x P(t)
Mug experiment
- Owners' asking price $7.12
- Non-owners' bid $3.12
- Retail value about $5
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