Introduction to Economics Flashcards

Budget Constraints and Consumer Choice

• Budget Constraint Definition: A budget constraint represents the total financial limit an individual or entity has available to spend across goods and services.   

• Disposable Income:

  • Income remaining after paying all essential bills and settling outstanding debt obligations.
  • Used for non-necessities, recreational expenditures, and discretionary leisure choices.

• Economic Preferences and Price Changes:

  • Consumer choices shift based on relative price changes between substitute goods (e.g., orange juice vs. grape juice).
  • If two goods are equal in preference and the price of one doubles, economic behavior and purchasing choices alter.
  • Sensitivity to price changes varies by individual continuum:
  • Highly price-sensitive consumers adjust purchasing behavior following minimal price increases (e.g., a $10\text{ cent}$ increase).
  • Less price-sensitive consumers require larger price movements (e.g., price doubling) before changing their consumption habits.

• Budget Constraint Model (Burgers vs. Bus Tickets):

  • Total Budget: $\\n10$
  • Price of Burgers: $\\n2$ per burger
  • Price of Bus Tickets: $\\n0.50$ ($50\text{ cents}$) per ticket
  • Maximum Purchasing Capacity:
  • Burgers: $\frac{\\n10}{\\n2} = 5$ burgers
  • Bus Tickets: $\frac{\\n10}{\\n0.50} = 20$ bus tickets
  • Budget Line Slope:
  • The slope of the budget constraint line reflects the relative price ratio between the two goods.
  • A $1\text{-to-}1$ price ratio yields a slope representing an equal trade-off.
  • When prices differ, the slope reflects the non-one-to-one relative price ratio.
  • Opportunity Set:
  • Encompasses all achievable consumption bundles located directly on or beneath the budget constraint line.
  • Example: Purchasing $4$ burgers costs $4 \times \\n2 = \\n8$, leaving $\\n2$ available to purchase $\frac{\\n2}{\\n0.50} = 4$ bus tickets. The point $(4\text{ burgers}, 4\text{ bus tickets})$ sits directly on the opportunity set.
  • Unattainable Bundle: A combination of $5$ burgers ($\\n10$) and $20$ bus tickets ($\\n10$) requires a total budget of $\\n20$. Because this exceeds the $\\n10$ budget, it lies outside the opportunity set and is impossible.

• Opportunity Cost:

  • Defined as the trade-off or specific value of the next best alternative foregone when making a choice.
  • Example 1: Moving from zero burgers to $5$ burgers incurs an opportunity cost of foregoing $20$ bus tickets.
  • Example 2: Purchasing $20$ bus tickets incurs an opportunity cost of foregoing $5$ burgers.

Discretionary Income and Wage Statistics

• Points Beneath the Budget Constraint:

  • Any consumption bundle inside/underneath the constraint line represents spending less than the total available budget.
  • Surplus funds resulting from spending below budget can be reallocated toward:
  • Purchasing other goods and services.
  • Short-term or long-term savings.
  • Financial market investments.
  • Retirement planning.

• Bureau of Labor Statistics (BLS) Data Analysis:

  • Government statistics often reflect time lags due to meticulous data collection and verification protocols.
  • Median vs. Mean (Average) Earnings:
  • Mean (Average): Highly susceptible to distortion by extreme high-value outliers (e.g., ultra-high-net-worth individuals earning over $\\n50\text{ billion}$ or possessing net worths exceeding $\\n1\text{ trillion}$ skew national averages upward).
  • Median: Identifies the exact middle data point where $50\%$ of the population earns above and $50\%$ earns below, providing a more accurate baseline for central tendency.

• Demographic Contextual Factors:

  • National lifespan expectations have historically increased.
  • Average retirement ages continue to rise over time.

• BLS Median Weekly Earnings by Education Level:

  • High School Diploma: $\\n930$ per week.
  • Bachelor's Degree: $\\n1{,}500$ per week (nearly double the high school diploma baseline).
  • Professional Degree (e.g., Medical Doctors, Dentists, Lawyers; distinct from PhD research doctorates): Peak at $\\n2{,}363$ per week.
  • Macroeconomic Trade-off: Pursuing higher education represents a trade-off where immediate earnings and time are sacrificed for higher long-term compensation.

Financial Trade-Offs in Vehicle Ownership

• Simplified Discretionary Budget Model:

  • Weekly Discretionary Budget: $\\n36$
  • Cost of Lunch: $\\n6$ per meal
  • Cost of Bus Ride: $\\n3$ per ticket
  • Maximum Lunch Units: $\frac{\\n36}{\\n6} = 6$ lunches
  • Maximum Bus Ride Units: $\frac{\\n36}{\\n3} = 12$ bus rides
  • Model Limitations: Two-good economic models simplify real-world choices by excluding essential living costs (breakfast, dinner, apparel, digital subscriptions).
  • Shift in Budget Constraint: An increase in overall income or available capital shifts the entire budget constraint line upward and outward.

• Vehicle Acquisition: Purchasing vs. Leasing:

  • Purchasing (Cash or Loan):
  • Grants full ownership and absolute operational control of the vehicle once paid off.
  • Favorable credit profiles allow financing at low interest rates (e.g., $0\%$ to $2\%$ loan rates).
  • Leasing:
  • Vehicle must be returned to the dealership at the expiration of the term.
  • Imposes contractual restrictions, such as mileage allowances.
  • Economically optimal during temporary relocations (e.g., living in a specific state or country for a PhD program with predictable, minimal driving needs).
  • Case Example of Lease Economics:
  • Vehicle Purchase Price: ~$\\n30{,}000$
  • Lease Terms: $\\n329$ monthly payment for a $3\text{-year}$ ($36\text{-month}$) duration.
  • Mileage Limitation: Maximum $10{,}000\text{ miles}$ per year.
  • Due at Signing: $\\n4{,}000$ upfront payment.
  • Equity Consideration:
  • Equity: The financial value accumulated through ownership of an asset.
  • Leasing yields zero equity accumulation, as all lease payments represent non-recoverable operational expenses.

Behavioral Economics and Retail Strategies

• Behavioral Economics and Psychology:

  • Examines psychological triggers that lead consumers to make economically irrational purchases.
  • Perpetual Markdown Retail Strategy (e.g., Kohl's):
  • Retailers manipulate perceived opportunity cost by listing goods with perpetual discounts (e.g., "$50\%$ off").
  • Running identical markdown sales $365$ days a year means the discounted rate functions as the baseline regular retail price, artificially inducing a false sense of value.

• Food Delivery Utility Trade-Offs (e.g., DoorDash):

  • Real-world cost structures include: inflated base menu pricing + platform subscription fees + service/delivery fees + driver tips.
  • Restaurant Upcharges: Restaurants systematically inflate prices on delivery platforms (e.g., charging $\\n40$ to $\\n50$ for orders) to offset commission fees extracted by the delivery platform.
  • Utility Motivation: Despite high markups, missing items, and elevated costs, consumers continue using delivery services due to high perceived convenience (utility).

Marginal Utility and Incremental Decision-Making

• Marginal Analysis Definition:

  • The evaluation of incremental benefits and incremental costs associated with choosing slightly more or slightly less of a particular good or service.

• Law of Diminishing Marginal Utility:

  • As consumption of a specific good increases, the additional utility (satisfaction or benefit) derived from each successive unit decreases.
  • Caffeinated Beverages Example:
  • First energy drink/coffee: Delivers maximum utility, alertness, and satisfaction.
  • Second drink: Provides diminished incremental utility relative to the first.
  • Third or fourth drink: Offers minimal to negligible positive utility and may introduce negative effects.
  • Pizza Consumption Example:
  • First slice when hungry: Exceptionally high utility.
  • Second slice: Less utility as hunger decreases.
  • Third slice: Further decline in marginal satisfaction as fullness sets in.

Corporate Marketing Tactics and Ethical Controversies

• Marketing Interventions Against Diminishing Utility:

  • Marketers design strategies to counteract diminishing marginal utility and maintain continuous customer purchasing behavior.
  • Customer Loyalty & Rewards Programs:
  • Structure incentives (e.g., "Buy 3, Get 3 Free" promotions) that compel consumers to purchase quantities beyond their immediate marginal utility requirements.

• Historical Case Studies of Artificial Need & Marketing Ethics:

  • Gillette Women's Razors:
  • Body hair removal among women was not historically a standard consumer practice.
  • During wartime, as male consumers entered military service, marketers targeted women entering the workforce with disposable income.
  • Campaigns framed non-shaved body hair as unhygienic, successfully manufacturing an ongoing commercial demand for razors.
  • Nestlé Infant Formula in Developing Regions:
  • Distributed free formula samples to mothers in African regions.
  • Continuous sample usage caused mothers' natural lactation to stop, compelling long-term formula purchases; product was later withdrawn following international public backlash.
  • Mouthwash Advertising Claims:
  • Advertised product as being "$99\%$ better at preventing cavities than brushing alone."
  • Omitted that the study baseline for "brushing alone" was defined as using a dry toothbrush without toothpaste or water.

Sunk Costs and Consumer Decision Frameworks

• Sunk Cost Definition:

  • Costs that have already been incurred in the past and cannot be recovered under any future economic decision.
  • Sunk costs must be disregarded when making prospective economic choices.
  • Examples:
  • Immediate market depreciation and non-refundable fees incurred when driving a new car off the dealership lot.
  • Custom automotive paint expenditures.
  • Unrecoverable research and development ($R\&D$) spending on a failed commercial product line.

• Sunk Cost Fallacy Scenarios:

  • Food Delivery Example: Spending $\\n25$ to $\\n55$ on a unsatisfactory food delivery order.
  • Irrational Choice (Sunk Cost Fallacy): Consuming the unpalatable food solely because money was spent on it.
  • Rational Decision: Evaluating the time and friction required to contact support versus the marginal credit recovery (e.g., receiving a $\\n10$ credit refund).

• Subscription Friction and Business Models:

  • Planet Fitness Model:
  • Intentionally omits high-end specialized weightlifting equipment, targeting casual gym users.
  • Low pricing threshold ($\\n10$ monthly fee) creates a minor financial burden, encouraging consumers to maintain unutilized subscriptions.
  • Regulatory Interventions in Subscription Cancellations:
  • Subscription businesses historically instituted complex cancellation procedures (e.g., mandatory phone calls with retention personnel like SiriusXM).
  • Consumer protection regulations (e.g., New York state cancellation mandates) require streamlined, short digital cancellation processes to reduce consumer friction.

Production Possibilities Frontier and Resource Allocation

• Non-Linear Opportunity Costs:
  • Real-world production trade-offs do not feature constant straight-line slopes because resources are specialized.
  • Government Allocation Model (Healthcare vs. Education):
  • The Production Possibilities Frontier ($PPF$) between public goods exhibits a curved, changing slope.
  • Resource Non-Adaptability: Professionals and capital in education cannot instantly transition into clinical healthcare roles without substantial retrain costs and efficiency losses, creating non-constant, increasing opportunity costs along the curve.

Course Assessment and Reflection Framework

• Three-Part Analytical Reflection Framework:

  1. What Happened?: Identify and describe the specific transaction, scenario, or economic choice.
  2. So What?: Interpret why the event matters, analyze underlying implications, and evaluate marginal costs and utilities.
  3. Now What?: Project into the future to determine how this understanding alters consumer perspectives and prospective behavior.

• Deliverables and Timelines:

  • In-class writing allocation: $5\text{ minutes}$ provided to complete the reflection response.
  • Submission Deadline: Submit reflection response by end of day or by Wednesday.
  • Upcoming Evaluation: First formal oral presentation scheduled for the $6\text{th}$ of the month.