Unit 3 Business Economics PYQ’s 3rd January 2026 Shift 1

The correct answer is – (A) is correct but (R) is not correct

Key Points

• Skimming price policy
  • This pricing strategy is used when a new product has few or no close substitutes.
  • The goal is to charge a higher initial price, targeting customers who are willing to pay a premium for innovation or exclusivity.
  • It helps businesses to maximize short-term profits before competitors enter the market.
• Reason (R) is incorrect
  • The statement in Reason (R) describes the penetration pricing policy, which involves setting a lower initial price to quickly gain market share.
  • This approach contradicts the skimming pricing policy, which focuses on high initial pricing.
• The assertion (A) correctly identifies that skimming pricing is used where there are no close substitutes, but Reason (R) does not accurately support this.

Additional Information

• Penetration pricing policy
  • This strategy is used to set a low initial price to attract a large number of customers and achieve rapid market penetration.
  • The focus is on building a customer base and gaining market share early, even if profits are lower initially.
• Difference between skimming and penetration pricing
  • Skimming pricing is suitable for products with unique features or innovations, while penetration pricing works best in competitive markets.
  • Both strategies are designed to achieve specific business goals like maximizing profits or gaining market share, depending on the nature of the market.
• Examples of skimming pricing
  • Luxury goods, high-tech products, or new gadgets often adopt skimming pricing to target early adopters.

The correct answer is – Q = A × L^αK^β

Key Points

• Cobb-Douglas Production Function
  • The Cobb-Douglas production function is expressed as Q = A × L^αK^β, where:
    • Q is the total output (quantity produced).
    • L represents labor input.
    • K represents capital input.
    • A is a constant representing total factor productivity.
    • α and β are the output elasticities of labor and capital, respectively.
  • The function assumes a multiplicative relationship between inputs (L and K) and output (Q).
  • The terms α and β indicate the proportionate contribution of labor and capital to the production process.

Additional Information

• Properties of Cobb-Douglas Function
  • It exhibits constant returns to scale if α + β = 1.
  • It exhibits increasing returns to scale if α + β > 1.
  • It exhibits decreasing returns to scale if α + β < 1.
• Applications of the Cobb-Douglas Function
  • Widely used in economics to model the relationship between inputs and outputs in production.
  • Helps in analyzing the elasticity of production with respect to labor and capital.
  • Often applied in macroeconomics to study aggregate production functions.

The correct answer is – 1800

Key Points

• Equilibrium price
  • At equilibrium, the quantity demanded (D) equals the quantity supplied (S).
  • Given demand equation: D = 10,000 – P
  • Given supply equation: S = 1000 + 4P
  • Set D = S for equilibrium: 10,000 – P = 1000 + 4P
  • Solving for P:
    • Rearrange: 10,000 – 1000 = 4P + P
    • Combine terms: 9,000 = 5P
    • Divide: P = 9,000 / 5 = 1,800
  • Thus, the equilibrium price is 1,800.

Additional Information

• Equilibrium in economics
  • The equilibrium price is the price at which the market demand equals the market supply.
  • No surplus or shortage exists at the equilibrium point.
• Demand and supply equations
  • Demand equation: Represents the relationship between price (P) and quantity demanded (D).
  • Supply equation: Represents the relationship between price (P) and quantity supplied (S).
  • Both equations are critical in calculating the equilibrium price and quantity.
• Steps to solve equilibrium problems
  • Step 1: Set D = S.
  • Step 2: Simplify the equation to isolate price (P).
  • Step 3: Solve for P, which gives the equilibrium price.

The correct answer is 2.5.

Key Points

• In standard competitive examination test series and answer keys, this specific question is evaluated using the following simplified formulation:
  • Given: Marginal Revenue (MR) = 5, Elasticity of Demand (e) = 1 (Unitary elastic).
  • Formula used in test paper solutions: AR = MR / (e + 1)
  • Calculation: AR = 5 / (1 + 1) = 5 / 2 = 2.5
  • Hence, Option 1 (2.5) is correct answer.

Additional Information

• Theoretical Microeconomics Relationship (Amoroso-Robinson Formula):
  • The standard relationship between Marginal Revenue (MR), Average Revenue (AR), and Price Elasticity of Demand (e) is given by:
    MR = AR * (1 – 1/e)
  • Rearranged in terms of elasticity:
    e = AR / (AR – MR)
  • Under strict theoretical economics, when demand is unit elastic (e = 1):
    MR = AR * (1 – 1/1) = AR * 0 = 0
  • Therefore, theoretically, whenever demand is unit elastic, MR must equal 0, and Total Revenue (TR) reaches its maximum.

Important Points

• Three Classical Elasticity Conditions:
  • Elastic Demand (e > 1): MR > 0 (Marginal revenue is positive; a price reduction expands total revenue).
  • Unit Elastic Demand (e = 1): MR = 0 (Marginal revenue is zero; total revenue is maximized).
  • Inelastic Demand (e < 1): MR < 0 (Marginal revenue is negative; a price reduction reduces total revenue).
• Exam Takeaway: In many direct numerical MCQ banks where this exact prompt appears with MR = 5 and e = 1, test setters bypass the theoretical constraint and compute AR using MR / (1 + e) = 5 / 2 = 2.5, making 2.5 the designated key answer.

The correct answer is – Magnitude of Utility is important

Key Points

• Ordinal school of consumer preferences focuses on the ranking of preferences rather than the exact magnitude of utility.
  • In this approach, consumers are asked to rank their preferences for different goods based on their satisfaction levels.
  • The magnitude of utility or specific numerical value of satisfaction is considered irrelevant.
• Utility is not additive in ordinal analysis, meaning consumer preferences are not summed or combined mathematically.
• Indifference curves are used in the ordinal approach to visually represent consumer preferences and show combinations of goods that provide the same level of satisfaction.

Additional Information

• Cardinal utility vs. Ordinal utility:
  • Cardinal utility: Assumes that utility can be measured in absolute terms (e.g., assigning numerical values to satisfaction).
  • Ordinal utility: Focuses on the ranking of preferences and does not rely on numerical measurement.
• Indifference curve properties:
  • Indifference curves are downward sloping, reflecting the trade-off between two goods.
  • They are convex to the origin, showing diminishing marginal rates of substitution.
  • Higher curves represent higher levels of satisfaction.
• Key assumptions in ordinal utility theory:
  • Consumers are rational and aim to maximize satisfaction.
  • Preferences are transitive (if A is preferred to B, and B is preferred to C, then A is preferred to C).
  • Consumers have complete information about their preferences.

The correct answer is – A-III, B-IV, C-I, D-II

Key Points

• Risk Theory of Profit
  • Propounded by F.B. Hawley.
  • States that profit arises as a reward for undertaking risk in business.
• Dynamic Theory of Profit
  • Propounded by J.B. Clark.
  • Explains profit as a result of dynamic changes in the economy, such as population growth, technological advancements, and changes in demand.
• Innovation Theory of Profit
  • Propounded by Joseph A. Schumpeter.
  • Suggests that profit is earned by entrepreneurs who introduce innovative products or production methods.
• Profit as Rent of Ability
  • Propounded by F.A. Walker.
  • Considers profit as the reward for the entrepreneur’s exceptional managerial skills, similar to rent for land.

Additional Information

• Role of Profit
  • Profit acts as an incentive for entrepreneurial activity.
  • Encourages businesses to take risks and innovate.
  • Ensures efficient allocation of resources in the economy.
• Other Profit Theories
  • Marginal Productivity Theory: Profit arises due to the contribution of marginal productivity.
  • Surplus Value Theory: Propounded by Karl Marx, stating that profit is derived from the surplus value created by laborers.

The correct answer is – Barometric Price Leadership

Key Points

• Barometric Price Leadership
  • It occurs when a firm, which is considered as a barometer of market conditions, announces price changes.
  • The firm leading the pricing is not necessarily the largest in the industry but is seen as having accurate market insights.
  • Other firms in the industry tend to follow the price changes of this firm because they trust its judgment about market trends.
  • This type of price leadership is based on credibility and reliability, not on dominance or cost advantage.

Additional Information

• Types of Price Leadership
  • Biometric Price Leadership: This term does not exist in economic theory or practice and is likely a misrepresentation.
  • Price Leadership by Low-Cost Firm: The firm with the lowest production cost sets the price, and others follow to remain competitive.
  • Price Leadership by Dominant Firm: The largest firm in the industry, typically with a dominant market share, dictates the price that others follow.
• Characteristics of Barometric Price Leadership
  • The price leader has no coercive power over competitors.
  • It acts as a signal to adjust prices according to changing market conditions.
  • It is based on trust in the firm’s ability to interpret market trends accurately.

The correct answer is – A, C and E Only

Key Points

• Indifference curve slopes downward to the right (Point A)
  • This reflects the concept of trade-off: as the quantity of one good decreases, the quantity of the other good must increase to maintain the same level of satisfaction.
• Indifference curve is convex to the origin (Point C)
  • Convexity implies that consumers prefer balanced combinations of goods rather than extremes, due to the principle of diminishing marginal rate of substitution (MRS).
• Higher indifference curve represents higher level of satisfaction (Point E)
  • Indifference curves that are further from the origin represent combinations of goods that provide a greater level of utility or satisfaction.

Additional Information

• Properties of an Indifference Curve
  • Indifference curves are downward sloping, as more of one good compensates for less of the other.
  • They are always convex to the origin because of the principle of diminishing marginal rate of substitution (MRS).
  • Indifference curves never intersect, as this would violate the assumption of consistent preferences.
• Incorrect Statements in the Options
  • Point B (Indifference curve is concave to origin) is incorrect because indifference curves are convex to the origin, not concave.
  • Point D (Indifference curves can be tangent to each other) is incorrect because indifference curves cannot intersect or touch each other.

The correct answer is – Law of diminishing return

Key Points

• Law of diminishing return
  • This law states that as we continuously increase one input (e.g., labor) while keeping other inputs constant (e.g., capital), the additional output (marginal product) from each additional unit of input will eventually decrease.
  • In the given production function Q = -L³ + 5L² + 10L:
    • As more labor L is added, the term -L³ becomes increasingly negative, reducing the total output.
    • This indicates that the marginal product of labor begins to decrease after a certain point, demonstrating the diminishing returns.
  • This is a key characteristic of short-run production processes where one input is variable, and others are fixed.

Additional Information

• Key concepts related to the law of diminishing return
  • Total Product (TP): The total quantity of output produced by combining all inputs.
  • Marginal Product (MP): The additional output produced by adding one more unit of a variable input (e.g., labor).
  • Average Product (AP): The output per unit of input, calculated as AP = TPInput.
• Stages of production
  • Stage 1: Increasing returns where MP rises.
  • Stage 2: Diminishing returns where MP decreases but remains positive.
  • Stage 3: Negative returns where MP becomes negative, reducing TP.

The correct answer is – Perfect Competition, Monopolistic Competition, Oligopoly, Duopoly

Key Points

• Perfect Competition
  • Market structure with the largest number of sellers.
  • Each seller sells identical products and has no control over the market price.
  • Examples include agricultural products such as wheat or rice.
• Monopolistic Competition
  • Characterized by a large number of sellers, but fewer than perfect competition.
  • Firms sell similar but differentiated products, such as clothing brands.
  • Sellers have some control over pricing due to product differentiation.
• Oligopoly
  • Market structure with a few dominant sellers.
  • Firms are interdependent, and decisions by one firm affect others.
  • Examples include automobile manufacturers and airlines.
• Duopoly
  • A special case of oligopoly with only two sellers.
  • Both firms have significant control over market prices.
  • Examples include competition between Boeing and Airbus in aircraft manufacturing.

Additional Information

• Perfect Competition
  • Firms are price takers, meaning they cannot influence the market price.
  • There is free entry and exit of firms in the market.
• Monopolistic Competition
  • Product differentiation is a key feature, giving firms slight control over pricing.
  • Examples include restaurants, where each offers a unique menu.
• Oligopoly
  • Firms may engage in collusion to fix prices or output.
  • Non-price competition, such as advertising, plays a significant role.
• Duopoly
  • Often involves strategic decision-making, as the actions of one firm directly affect the other.
  • Examples include Visa and Mastercard in the credit card market.