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Price Taker vs Price Maker Simulator

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About This MicroSim

This MicroSim provides a side-by-side comparison of pricing decisions in perfect competition versus monopoly. On the left, you play as a price taker who must accept the market price or lose all customers; on the right, you play as a monopolist who can set any price but faces a downward-sloping demand curve. The simulation calculates revenue, cost, and profit in real time, helping students see why competitive firms have no pricing power while monopolists must balance higher prices against fewer customers.

How to Use

  1. Adjust the left slider ("Your Price" under Perfect Competition) to set your price as a competitive firm. Notice that pricing above the market price of $10 means zero customers, while pricing at or below it gives you full demand.
  2. Adjust the right slider ("Your Price" under Monopoly) to set your price as a monopolist. Watch how the quantity demanded changes along the downward-sloping demand curve.
  3. Compare the profit figures on each side. Try to maximize profit in each market structure and observe why the optimal strategies differ.
  4. Read the feedback messages below each panel for guidance on whether your price is too high, too low, or optimal.
  5. Click Reset to return both sliders to their default values.

Iframe Embed Code

You can add this MicroSim to any web page by adding this to your HTML:

<iframe src="https://dmccreary.github.io/economics-course/sims/price-taker-vs-maker/main.html"
        height="487px"
        width="100%"
        scrolling="no"></iframe>

Lesson Plan

Grade Level

9-12 (High School Economics)

Duration

10-15 minutes

Prerequisites

  • Understanding of supply and demand curves
  • Knowledge of the difference between perfect competition and monopoly
  • Basic concept of profit (revenue minus cost)

Activities

  1. Exploration (5 min): Have students experiment with both sliders. On the competition side, ask them to try prices above, below, and exactly at the market price and record what happens to customers and profit. On the monopoly side, ask them to find the profit-maximizing price.
  2. Guided Practice (5 min): Ask students to explain why the competitive firm cannot charge above $10 (customers go elsewhere) and why the monopolist's optimal price is not the highest possible price (demand falls). Discuss the concept of marginal revenue equaling marginal cost.
  3. Assessment (5 min): Students write a short paragraph comparing the two market structures, explaining which gives consumers lower prices and why, and what "price taker" versus "price maker" means in practice.

Assessment

  • Students can explain why a perfectly competitive firm must accept the market price.
  • Students can identify the profit-maximizing price for a monopolist and explain the tradeoff between price and quantity.
  • Students can articulate the consumer welfare implications of each market structure.

References

  1. Price taker - Wikipedia -- Explanation of why firms in competitive markets cannot influence prices.
  2. Monopoly - Wikipedia -- Overview of monopoly pricing, demand curves, and deadweight loss.
  3. Monopoly profit maximization - Khan Academy -- Video tutorial on how monopolists set prices to maximize profit.