The most common measure of market potential of an economy is considered to be?

Gross Domestic Product (GDP) is a comprehensive measure that reflects the total monetary value of all finished goods and services produced within a country's borders in a specific time period. It serves as a key indicator of the economic health of a nation and is often used to gauge market potential. A higher GDP indicates a larger economy with more productivity and potential consumer purchasing power, suggesting a greater market suitable for business expansion and investment.

While consumer spending is an important aspect of economic activity and can influence GDP, it is only one component of the broader GDP calculation. The employment rate provides insight into the labor market but does not directly measure the overall economic activity or potential. Investment levels are significant as they indicate future growth potential, but they also fall under the broader analysis of GDP. Thus, GDP's role as a comprehensive metric makes it the most common measure of market potential for an economy.