Market Structures

A dominant firm operating in a non-collusive oligopoly currently sells its product at a prevailing market price of $P_0 = \text{N}4,000$. The price elasticity of demand for its product is $|E_d| = 2.8$ for prices above $P_0$, and $|E_d| = 0.35$ for prices below $P_0$. If an automated production process reduces the firm's marginal cost from $MC_1 = \text{N}2,500$ to $MC_2 = \text{N}2,100$, and this new marginal cost line continues to intersect the vertical gap in the marginal revenue curve, how will the firm adjust its price and output to maximize profits?

A profit-maximizing monopolist determines its equilibrium output in both the short run and the long run at the point where marginal revenue equals marginal cost ($MR = MC$).

In a perfectly competitive market, an individual firm is considered a price taker because its output is so small relative to total market supply that it cannot influence the market price.

A profit-maximizing monopolist produces at an equilibrium output level of $100$ units. At this output, the product is sold at a price of $\$60$ per unit and the average total cost is $\$45$ per unit. What is the total profit earned by the monopolist in dollars?

A firm operating in a perfectly competitive market faces a constant market equilibrium price of $P = \$60$. The firm's short-run total cost function is given by $TC = Q^2 + 20Q + 100$, where $Q$ represents output in units, resulting in a marginal cost function of $MC = 2Q + 20$. What is the total short-run economic profit earned by this firm at its profit-maximizing output level?

In an oligopolistic market for cement in Nigeria, a leading firm observes that if it raises its price above the prevailing market price of $₦4,000$ per bag, rival firms do not follow the price increase. Conversely, if it lowers its price below $₦4,000$, rival firms match the price reduction immediately. Which of the following best describes the price elasticity of demand facing this firm in these two price regions?

A monopolist faces a market demand curve given by $P = 70 - 2Q$ and operates with a short-run total cost function $TC = 50 + 10Q + Q^2$, where $P$ is the price in Naira ($\mathbb{N}$) and $Q$ is the output level in units. What is the firm's profit-maximizing output level and its resulting short-run economic profit?

Match each type or characteristic of oligopoly on the left with its corresponding market description on the right.

In a non-collusive oligopolistic market for wireless telecommunication services, a major network provider operating at an equilibrium price of $P_0$ observes that raising its subscription rates leads to a sharp decline in total revenue, while lowering rates below $P_0$ yields negligible changes in sales volume. Based on the kinked demand curve model, which of the following explains this asymmetric revenue outcome?

A monopolist faces a market demand function given by $P = 140 - 2Q$, where $P$ is the price in Naira and $Q$ is the output level. The total cost function of the firm is $TC = 20Q + Q^2 + 200$. What is the maximum economic profit, in Naira, earned by the monopolist at equilibrium?

In Paul Sweezy's kinked demand curve model for a non-collusive oligopoly, a firm observes that its price elasticity of demand is $|E_d| = 2.5$ for price increases above the prevailing market price $P_0$, but $|E_d| = 0.4$ for price cuts below $P_0$. Which of the following best explains the underlying behavioral assumption of rival firms and the resulting structure of the firm's marginal revenue curve?

In the short run, a firm operating in a perfectly competitive market achieves profit maximization by expanding output up to the level where marginal cost ($MC$) is equal to which of the following?

A major agricultural processing firm operates as the sole buyer of cocoa beans in a rural region. In profit-maximizing equilibrium, how do the prices paid to farmers and the quantity of cocoa purchased by this monopsonist compare to outcomes in a competitive market?

Match each oligopolistic market structure or analytical model on the left with its defining operational characteristic or price behavior on the right.

Match each market structure or market arrangement with its corresponding long-run economic efficiency and consumer welfare outcome.

In long-run equilibrium, a profit-maximizing monopolist operating under conventional U-shaped cost curves will adjust its plant size to produce at the minimum point of its long-run average cost ($LAC$) curve, thereby achieving productive efficiency.

In long-run equilibrium, a firm in a monopolistically competitive market operates where price equals average total cost ($P = ATC$), but price exceeds marginal cost ($P > MC$) and remains above the minimum point of the average total cost curve ($P > \text{min } ATC$). Compared to a perfectly competitive industry operating under identical cost conditions, which of the following best describes the efficiency and consumer welfare outcome?

A monopolist faces a market demand curve given by $P = 100 - 4Q$, where $P$ is price in Naira and $Q$ is output quantity. The firm operates with a constant marginal cost $MC = \text{N}20$ and total fixed costs of $\text{N}100$. What are the profit-maximizing total revenue and economic profit for this firm in the short run?

Which of the following core characteristics of an oligopolistic market forces each firm to consider the potential reactions of rival firms whenever it alters its price or output strategy?

In a non-collusive oligopolistic market, a leading firm faces a kinked demand curve with two distinct price-demand relationships: for price increases above the current equilibrium, the demand curve is $P_1 = 280 - 2Q$; for price cuts below the current equilibrium, the demand curve is $P_2 = 400 - 5Q$, where $P$ is price in Naira (₦) and $Q$ is output in units. What is the value of the vertical discontinuity (gap) in the firm's marginal revenue curve at the kink equilibrium quantity?