Free Ebook cover Economics Made Practical: Personal Choices, Prices, and Simple Market Thinking

Economics Made Practical: Personal Choices, Prices, and Simple Market Thinking

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Preferences, Incentives, and How People Respond to Prices

Capítulo 4

Estimated reading time: 14 minutes

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Preferences: What You Want, and How Economists Describe It

Preferences are the patterns in what you choose when you face options. They are not about what you “should” want; they describe what you actually pick given your situation. In practical economics, preferences help explain why two people facing the same prices and income can buy very different baskets of goods.

Economists often treat preferences as “stable” in the short run so they can focus on how changes in prices and incentives shift behavior. In real life, preferences can evolve (new tastes, new habits, new information), but many day-to-day choices are predictable enough that it’s useful to separate: (1) what you like, and (2) what the environment makes easier or harder to do.

Key features of preferences (in plain language)

  • Ranking: You can usually rank options: you’d rather have A than B, or you’re indifferent between them.
  • Trade-offs: Preferences show up when you must choose one thing over another (for example, brand vs. price, convenience vs. quality).
  • Context dependence: Your ranking can change with context: time pressure, who you’re with, how hungry you are, or whether you’re paying with cash vs. card.
  • Heterogeneity: People differ. A “typical consumer” is a simplification; real markets contain many preference types.

Practical takeaway: when you observe a purchase, you are seeing preferences filtered through constraints (prices, budget, time, rules). If you want to predict behavior, you need both.

Incentives: The Reasons People Change What They Do

An incentive is anything that makes an action more or less attractive. Incentives can be monetary (discounts, fees, wages) or non-monetary (time saved, social approval, convenience, reduced risk). Prices are a major incentive because they translate choices into a clear “cost to you” per unit.

Common incentive types you see in everyday life

  • Price incentives: sales, surge pricing, bulk discounts, late fees, subscription price changes.
  • Time incentives: faster shipping, express lanes, appointment availability, commuting time.
  • Risk incentives: warranties, insurance deductibles, penalties for cancellation.
  • Social incentives: loyalty programs with status tiers, public recognition, peer norms.
  • Rules and frictions: paperwork, waiting, complicated cancellation processes—these are incentives too because they change the “cost” of an action.

A useful habit is to ask: “What action is being encouraged, and what action is being discouraged?” Then look for the lever: price, time, risk, or hassle.

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How People Respond to Prices: The Basic Mechanism

When a price changes, it changes the attractiveness of choices. If the price of something rises, people tend to buy less of it, switch to alternatives, delay the purchase, reduce quality, or change how they use it. If the price falls, the opposite tends to happen. This is not a moral statement; it is a behavioral pattern that shows up repeatedly.

Two practical channels: substitution and budget pressure

  • Substitution: When one option becomes more expensive relative to others, people look for substitutes. If ride-share prices surge, some people take public transit, carpool, walk, or postpone the trip.
  • Budget pressure: A higher price means the same budget buys fewer units. Even if you love a product, you may buy less because it takes up more of your spending capacity.

In real decisions, these channels blend. You might both switch (substitute) and reduce quantity (budget pressure) at the same time.

Price response is not identical for all goods

Some purchases are easy to adjust (snacks, entertainment, restaurant meals). Others are harder (rent, essential medications, commuting needs). The easier it is to find substitutes or change habits, the more responsive demand tends to be.

Elasticity (Without the Jargon Overload): How Sensitive Choices Are

Price sensitivity is about how strongly quantity demanded changes when price changes. You do not need formulas to use this idea. You can treat it as a practical question: “If the price rises by 10%, will I change what I do a lot, a little, or not at all?”

What makes people more price-sensitive?

  • Good substitutes exist: Many similar brands, or alternative ways to meet the same need.
  • The item is a large share of your budget: Small price changes matter more when the purchase is big (rent, car payments).
  • You have time to adjust: Over weeks or months, people can change routines, learn alternatives, or renegotiate contracts.
  • The purchase is discretionary: Wants are easier to cut than needs.
  • Price is salient: If you see the price clearly at the moment of decision, you react more than when costs are hidden or delayed.

What makes people less price-sensitive?

  • Few substitutes: A specialized product or a location-specific need.
  • Habit and switching costs: Learning a new system, transferring data, changing providers.
  • Bundling and subscriptions: When costs are averaged or prepaid, each use feels “free,” reducing sensitivity.
  • Strong preferences: Brand loyalty, taste, or reliability concerns can dominate small price differences.

Practical takeaway: if you want to change your own behavior, increase price salience and reduce switching costs for the alternative you want to adopt.

Preferences vs. Prices: Separating “I Like It” from “It’s Cheap”

People often interpret purchases as pure preference: “I bought it because I like it.” But prices and incentives shape what you can afford and what feels reasonable. A helpful way to separate these forces is to run a mental experiment: “If the price were 30% higher, would I still buy it? If it were 30% lower, would I buy more or upgrade?”

This separation matters for practical decisions like budgeting, negotiating, and habit change. If you discover that your behavior is highly price-driven, then small price changes (fees, discounts, delivery charges) can steer you more than you expect.

Example: Coffee choices

  • If café coffee rises from $4 to $6, you might brew at home more often (substitution) and buy café coffee less frequently (quantity reduction).
  • If you still buy café coffee daily, that suggests strong preferences (taste, routine, social setting) or high switching costs (time, equipment, convenience).

Notice how the same behavior (buying coffee) can reflect different underlying reasons. Understanding which reason dominates helps you predict what will happen when prices change again.

Incentives Beyond Sticker Price: Hidden Costs and “All-in” Prices

Many decisions respond to the “all-in” price, not just the sticker price. The all-in price includes fees, time, effort, and risk. Two options with the same sticker price can feel very different once you include these components.

Common hidden or indirect price components

  • Fees: shipping, service charges, baggage fees, payment processing fees.
  • Time: travel time, waiting, setup time, customer service calls.
  • Uncertainty: risk of poor quality, return hassle, warranty limitations.
  • Attention and mental load: comparing plans, remembering renewal dates, managing passwords.

Businesses often compete by lowering one component while raising another (for example, low base fare plus add-ons). Consumers respond when these components become visible or painful.

Step-by-Step: How to Analyze a Price Change in Your Own Life

Use this process whenever a price change hits your budget (rent increase, subscription hike, grocery inflation, higher commute costs). The goal is not to “optimize everything,” but to make a clear, practical response.

Step 1: Define the decision and the time frame

Write down what changed and when you must decide. “My gym membership is increasing from $40 to $55 next month.” Time frame matters because short-run options differ from long-run options.

Step 2: Compute the all-in cost

Include fees, travel time, and hassle. A cheaper alternative that adds 30 minutes of travel each visit may be more expensive in practice.

Step 3: List realistic substitutes (not perfect substitutes)

Substitutes do not need to be identical; they just need to meet the underlying need. If the need is “exercise,” substitutes could be home workouts, running, a different gym, or a class package.

Step 4: Identify switching costs

Switching costs are what make you stick with the current option: cancellation fees, learning a new routine, buying equipment, losing social connections. Write them down explicitly so you can compare them to the ongoing savings.

Step 5: Predict your own responsiveness

Ask: “If I switch, will I actually follow through?” A cheaper option that you won’t use is not a substitute in practice. Preferences include convenience and habit, not just the activity itself.

Step 6: Choose an action rule

Create a simple rule that reduces repeated decision fatigue. Examples: “If the price rises above $X, I cancel.” “I will keep one streaming service at a time.” “I will only take ride-shares when the all-in price is below $Y.”

Step 7: Run a short trial

Instead of a permanent switch, test the alternative for two weeks. This reveals hidden costs and whether your preferences are as you expected.

Step-by-Step: Using Prices to Change Your Own Behavior (Personal Incentive Design)

You can treat your environment like a set of incentives you can redesign. If you want to do more of something, reduce its all-in price. If you want to do less, raise its all-in price.

Step 1: Pick one behavior and define it precisely

Not “spend less,” but “limit takeout dinners to 2 per week.” Not “save more,” but “auto-transfer $150 on payday.”

Step 2: Identify the immediate reward and immediate cost

Many habits persist because rewards are immediate and costs are delayed. Make the cost more immediate or the reward more immediate.

Step 3: Raise the all-in price of the unwanted behavior

  • Remove saved payment methods from delivery apps.
  • Set app limits or require a password to open the app.
  • Keep tempting items out of the house so the “price” includes a trip to the store.

Step 4: Lower the all-in price of the desired behavior

  • Prep ingredients so cooking is faster than ordering.
  • Place workout clothes where you see them first.
  • Automate savings so it happens before you can spend the money.

Step 5: Add a commitment device if needed

A commitment device is a pre-commitment that changes incentives later. Examples: paying for a class package you’ll feel motivated to use, scheduling workouts with a friend, or setting a non-refundable reservation that makes skipping costly.

Real-World Pricing Patterns and Typical Consumer Responses

Sales and “limited-time” discounts

Temporary price cuts encourage people to buy sooner, buy more, or try a product they wouldn’t at the regular price. A practical response is to separate “stock-up” goods (non-perishable items you will use) from “temptation” goods (items you buy mainly because they’re on sale).

Bulk pricing and quantity discounts

Lower unit prices for larger quantities encourage bigger purchases. People respond by buying more than they planned, sometimes increasing waste. A practical check is to compute the unit price and compare it to realistic usage before expiration.

Two-part pricing: membership plus per-use

Examples include warehouse clubs, gyms, and some delivery memberships. The membership fee changes incentives by making each additional use feel cheaper. People respond by using the service more to “justify” the fee, even if the total spending rises. A practical approach is to evaluate the membership based on expected usage, not hoped-for usage.

Subscriptions and auto-renewals

Subscriptions reduce the salience of each use’s cost. People respond by consuming more (because it feels prepaid) and by forgetting to cancel. A practical system is to keep a subscription list with renewal dates and to schedule a monthly “subscription audit” on your calendar.

Surge pricing and peak pricing

Higher prices at busy times push some consumers to shift timing, choose alternatives, or reduce demand. If you can be flexible, you can save money by traveling off-peak, shopping at less busy times, or batching errands.

Penalties and fees

Late fees, cancellation fees, and overdraft fees are incentives designed to change behavior by making certain actions costly. People respond by building reminders, buffers, or automation. If fees are frequent, it often signals a mismatch between your routines and the system’s rules, not just “carelessness.”

When Price Changes Don’t Change Behavior Much

Sometimes people barely respond to price changes. This can happen when the good is essential, when there are no good substitutes, or when the price change is small relative to income. It can also happen when the price is not noticed (low salience) or when decision-making is delegated (an employer pays, insurance covers, or a family member handles the bill).

Practical examples

  • Automatic payments: If a bill is on autopay, a small increase may go unnoticed for months.
  • Bundled services: If internet, TV, and phone are bundled, it’s harder to see the price of each component, reducing switching.
  • Work-related spending: If you’re reimbursed, you may be less sensitive to price and more sensitive to convenience.

To increase responsiveness, make costs visible: turn on notifications, review statements, and unbundle where possible so you can see what each part costs.

Preferences Are Not Just “Taste”: Quality, Reliability, and Trust

Many price responses are really quality responses. If a cheaper option is unreliable, the expected hassle becomes part of the all-in price. People may pay more to avoid uncertainty, especially for high-stakes purchases (childcare, car repairs, important travel).

How to incorporate quality into your decision

  • Track failure costs: If a cheap product breaks, include replacement time and inconvenience.
  • Use a short list of trusted sellers: This reduces search time and risk.
  • Pay attention to return policies: A generous return policy lowers risk and can make a higher sticker price effectively cheaper.

Incentives at Work: Wages, Bonuses, and Performance Measures

In workplaces, incentives shape effort, task choice, and cooperation. People respond not only to pay levels but to how pay is structured and measured. If a job rewards speed, workers may prioritize speed over quality. If it rewards individual output, teamwork may suffer unless teamwork is also rewarded.

Practical checklist for understanding a work incentive

  • What is being measured? Calls handled, sales closed, hours billed, customer ratings.
  • What is not being measured? Mentoring, long-term maintenance, careful documentation.
  • How quickly do rewards arrive? Weekly commissions vs. annual bonuses.
  • Are there thresholds? Bonuses that kick in after a quota can create strong end-of-period behavior changes.

This helps explain why people sometimes do things that look irrational from the outside: they may be responding to the incentives embedded in the measurement system.

Social Preferences and Fairness: Why People Don’t Respond Like Robots

People care about fairness, identity, and social relationships. These preferences can dampen or amplify price responses. For example, someone may keep buying from a local store even if it’s slightly more expensive because they value community support. Or a person may refuse a discount that feels manipulative.

Practical implications

  • Fairness constraints: You may accept a price increase if it feels justified (higher costs) but resist if it feels opportunistic.
  • Identity purchases: Some goods signal who you are (eco-friendly products, local brands). Price sensitivity can be lower when identity is involved.
  • Reciprocity: You may tip more for better service, or stay loyal to a business that treated you well during a problem.

Understanding these forces helps you predict when price changes will fail to move behavior and when non-price incentives (trust, service quality, transparency) will matter more.

Mini Case Studies: Putting It All Together

Case 1: Grocery inflation and meal planning

Suppose your usual grocery basket costs more this month. You can respond in several ways: switch brands, change recipes, buy more seasonal produce, reduce waste, or shop at a different store. The best response depends on your preferences (taste, time, cooking skill) and on switching costs (distance to another store, learning new recipes).

A practical approach is to identify 5–10 “flex meals” you like that can absorb price changes (for example, meals where the protein can be swapped: chicken, beans, eggs, tofu). This increases your ability to substitute when prices move.

Case 2: Transportation choices under variable pricing

If parking prices rise downtown and ride-share prices surge at peak hours, you might respond by shifting travel time, using public transit, or combining trips. Here the all-in price includes time and reliability. If public transit is slower but predictable, some people prefer it when surge pricing makes ride-shares uncertain and expensive.

Case 3: Streaming services and subscription creep

As subscription prices rise, many households do not cancel because each service is “only a little” and the cost is not salient. A practical response is to rotate services: keep one or two at a time, cancel the rest, and re-subscribe when a specific show you want is available. This uses substitution over time rather than trying to give up entertainment entirely.

Quick personal audit template (copy/paste into notes) 1) Price change noticed: ________ 2) All-in monthly cost (fees/time/hassle): ________ 3) Substitutes I would actually use: ________ 4) Switching costs (one-time): ________ 5) My action rule (threshold): ________ 6) Trial plan (2 weeks): ________

Now answer the exercise about the content:

When analyzing the impact of a price increase on something you regularly buy, which approach best separates preferences from price-driven constraints?

You are right! Congratulations, now go to the next page

You missed! Try again.

A what-if price change helps reveal whether you buy mainly because you like it or because it is affordable. Considering substitutes and budget pressure shows how incentives and constraints shape the choice.

Next chapter

Budget Constraints, Subscriptions, and Practical Spending Plans

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