Comprehensive Study Guide on Supply, Demand, and Market Fundamentals

Course Logistics and Administrative Announcements

Inquisitive Assignment #1:
- Covers Chapters 1, 2, and 3 (Demand and Supply).
- Due Date: By $01:59\text{ PM}$ on Monday, October 5 on Inquisitive.
- Completion Window: $10$ days provided to complete the assignment.
Thought Question Assignment #1:
- Due Date: By $11:59\text{ PM}$ this Sunday / Friday.
- Submission Policy: No late submissions under any circumstances; $9$ days were provided to complete it since posting.
Upcoming Assessments:
- Quiz 1 Results:
- Class average: $82\%$ .
- Strong performance areas: Benefit-cost analysis, graphing, positive versus normative economics, microeconomics versus macroeconomics.
- Areas needing improvement: Opportunity cost and incentives.
- Action Plan: Complete the $4$ -question assignment, continue practicing problems, and attend office hours. Quizzes returned after today's quiz submission.
- Quiz 2 (Today): Covers comparative advantage curves and absolute advantage.
- Quiz 3: Scheduled for next Friday in class.
- First Major Exam: Scheduled for Friday, October 9 ( $2$ weeks away).
Class Operations & Grading:
- Group Assignment #1: Group formation takes place in class next Wednesday.
- Attendance Policy:
- Attendance accounts for $10\%$ of the final course grade.
- Scores under $80\%$ on the week 2 attendance grade indicate a need for immediate improvement. Attendance bridges grade gaps (e.g., between a D and an A, or a C and a B).
- Office Hours:
- Schedule: Today from $12:00\text{ PM}$ to $12:45\text{ PM}$ and $3:00\text{ PM}$ to $5:00\text{ PM}$ .
- Location: Faculty office; JP attending via Zoom.

Questions & Discussion

Student Query Regarding Career Day Class Cancellations:
- Question: Many classes are canceling next Wednesday due to Career Day. Does this affect this course?
- Answer: No, class is not canceled. Economics is classified as a social science, not part of the business department. Attendance is mandatory.

Introduction to Demand and Willingness to Pay

Scope of Microeconomic Topics:
- Demand: Drawing and labeling demand curves, underlying structural relationships, and shift factors (rightward or leftward).
- Supply: Drawing supply curves and analyzing leftward or rightward shifts.
- Market Equilibrium: Combining supply and demand to identify equilibrium price and quantity.
- Price Distortions: Analyzing surpluses caused by pricing above equilibrium, shortages caused by underpricing below equilibrium, and methods to eliminate market imbalances.
- Equilibrium Dynamics: Shifts in equilibrium price and quantity driven by demand curve shifts.
Definition of Demand:
- Deals exclusively with the buyers' side of the economy.
- Defined as the willingness and ability to pay for a product or service during a specific time period (e.g., daily, monthly, quarterly).
Box of Pencils Willingness-to-Pay Example:
- Scenario: A box of pencils has a market price of $15$ .
- Buyer A (Henry): Has a willingness to pay of $20$ (or $25$ ). Because willingness to pay exceeds or meets the market price of $15$ , demand exists for Buyer A.
- Buyer B (JP): Operating on a limited budget, has a willingness to pay of $8$ . Because $8$ is less than the market price of $15$ , no demand exists for Buyer B for this product. Buyer B must purchase a lower quality of pencils within budget constraints.

The Law of Demand and Demand Schedules

The Law of Demand:
- Establishes an inverse relationship between the price of a good and the quantity demanded, ceteris paribus.
Ceteris Paribus:
- Latin phrase meaning "all other things being equal."
- Assumes every variable other than price and quantity demanded is held constant. A third variable does not alter demand during the analysis.
- Direct implication: An intentional change in price causes a direct movement in the quantity purchased.
General Motors (GM) Clearance Sale Case Study:
- Objective: GM needs to clear out excess inventory (glut) of $2026$ model cars to make room for $2027$ models.
- Demand Schedule Data:
- At a price of $40,000$ , quantity demanded is $10,000$ buyers/cars.
- When price falls to $30,000$ (utilizing discounts, cash incentives, cash rebates, and trade-in allowances of $10,000$ ), quantity demanded increases to $20,000$ buyers/cars.
- When price falls to $10,000$ , quantity demanded increases to $30,000$ buyers/cars.
- Price Increase / Production Tax Scenario:
- If a production tax is levied on $2026$ cars, forcing prices up from $10,000$ to $40,000$ , quantity demanded falls significantly.
- If GM prices rise due to a tax while competitor prices (e.g., Ford) remain constant, consumers switch to purchasing Ford vehicles, causing GM to lose sales volume and customers.
- Incentive Mechanism: Price cuts act as a positive indirect incentive, encouraging consumers to purchase more units. Conversely, price increases reduce quantity demanded.

Graphing the Demand Curve

Axes Setup:
- Vertical Axis ( $y$ -axis): Price ().\n * Horizontal Axis (x $-axis): Quantity ($ Q).\n\n* **Plotting Points**:\n * Point 1: (10,000, 40,000)\n * Point 2: (20,000, 30,000)\n * Point 3: (30,000, 10,000)\n\n* **Labeling**:\n * Connect plotted points to form a downward-sloping curve labeled D or "Demand."\n\n* **Movement Along the Curve**:\n * A change in price results solely in a movement *along* the existing demand curve, altering the quantity demanded. All non-price variables remain constant (*ceteris paribus*).\n\n# Non-Price Determinants and Shifts in the Demand Curve\n\n* **Change in Demand**:\n * Occurs when factors *other than price* change, violating *ceteris paribus* because a third variable enters the model.\n * Shifts the entire demand curve rightward or leftward from initial demand curve D_1 $to new demand curve$ D_2.\n\n* **Increase in Demand**:\n * Shifts the demand curve rightward from D_1 $to$ D_2$.
- More buyers enter the market, willing to pay higher prices and buy greater quantities.
- Producers respond by raising prices and increasing production to maximize profits (the primary objective of the firm).
Decrease in Demand:
- Shifts the demand curve leftward from $D_1$ to D_2$.\n * Fewer buyers exist in the market.\n * Prices are reduced and production is cut back, potentially leading to industry layoffs.\n\n# Specific Demand Shifters\n\n* **1. Taste and Preferences**:\n * **Example**: Red Sox vs. Yankees wild card playoff series in New York (best-of-three series).\n * Increased media coverage and excitement increase consumer interest.\n * Market Impact: Demand for playoff tickets increases as more buyers enter the market. The demand curve shifts rightward from D_1 $to$ D_2, driving ticket prices and output/availability up as the team seeks higher profitability.\n\n* **2. Consumer Income**:\n * Impact depends on the classification of the good:\n * **Normal Goods**:\n * Luxury goods or non-daily purchases.\n * Direct / Positive correlation between income and demand (as income rises, demand rises; as income falls, demand falls).\n * *Example*: Fine dining restaurants (e.g., Bugaboo Creek, Texas Steakhouse, LongHorn Texas Steakhouse, Texas Roadhouse, Chili's).\n * *COVID-19 Impact*: Stay-at-home orders led to job layoffs and reduced hours/pay, lowering consumer income. Demand for fine dining fell, shifting the demand curve leftward from D_1 $to$ D_2, causing price drops, lower sales, and staff layoffs.\n * **Inferior Goods**:\n * Low-cost items purchased based on budget constraints.\n * Inverse / Negative correlation between income and demand (as income falls, demand rises; as income rises, demand falls).\n * *Example*: Fast food establishments (e.g., McDonald's, Burger King, Wendy's).\n * *COVID-19 Impact*: As income dropped during the pandemic, consumers substituted fine dining with affordable fast food. Demand for fast food increased, shifting the demand curve rightward from D_1 $to$ D_2$$, leading to small price increases and expanded output.