Concept

Market Definition and Monopoly Power

The market power of a firm with a differentiated product is contingent on how its market is defined. This power is often measured by market share, which is the firm's proportion of the total quantity sold or total revenue within that market. A narrow market definition can portray a firm as a monopoly—for instance, a mineral spring owner has 100% of the market for their specific water. However, as the market is defined more broadly to include substitutes (e.g., all mineral waters, all bottled drinks), the firm's calculated market share and perceived power decrease. Ultimately, the elasticity of the firm's demand curve provides a comprehensive measure of competition from all substitutes, determining the firm's ability to set a price above its marginal cost.

0

1

Updated 2026-05-02

Contributors are:

Who are from:

Tags

Social Science

Empirical Science

Science

Economy

CORE Econ

Economics

Introduction to Microeconomics Course

The Economy 2.0 Microeconomics @ CORE Econ

Ch.7 The firm and its customers - The Economy 2.0 Microeconomics @ CORE Econ

Related
Learn After