Market power exists when one or more companies can profitably set prices for goods, services, and wages; and determine the quality, accessibility, and availability of goods and services. Market power, intertwined with deeply entrenched structural racism and class inequality, can have life-or-death consequences. This report explores the real-world impact of market power on the lives of people of color and people with low incomes–as workers, consumers, and entrepreneurs–as well as its effects on communities and society at large. The research shows that market power contributes to economic insecurity and hardship in low-income communities and communities of color, including by driving down wages and benefits; limiting and controlling the availability of goods, services, and jobs; and undermining American prosperity and democracy.