CP

Ceteris paribus is a Latin phrase meaning "all other things being equal" or "holding other variables constant."

It is a foundational concept in economics, science, and logic used to isolate the direct effect of a single variable by assuming that no outside factors change at the same time.

Key Applications

• Economics (Law of Demand): Ceteris paribus, if the price of coffee increases, the quantity demanded will decrease. (This assumes consumer income, preferences, and the price of tea remain constant.)
• Science & Physics: Isolating a single variable in a controlled experiment—such as testing how temperature affects gas pressure while keeping volume and mass constant.
• Logic & Policy Analysis: Evaluating the impact of a proposed change (e.g., raising taxes) by assuming external conditions like market stability or inflation remain unaffected.

Why It Matters

In real-world complex systems, conditions are rarely static. Stating ceteris paribus allows analysts and scientists to construct theoretical models, trace cause-and-effect relationships, and make predictions without getting bogged down by endless real-world noise.