What is the measure of the economic performance of a country known as?

The measure of the economic performance of a country is referred to as Gross Domestic Product (GDP). GDP represents the total monetary value of all goods and services produced within a country's borders in a specific time period, typically annually. It serves as a comprehensive indicator of a nation’s overall economic activity and is widely used to gauge the health of an economy.

GDP includes consumption, investments, government spending, and net exports (exports minus imports). By quantifying economic output, GDP allows for comparisons between different economies and helps policymakers assess areas of economic strength and weakness. This statistic is crucial for understanding economic growth, productivity trends, and the standard of living over time, making it a central focus for economists and decision-makers alike.

In contrast, other options, such as Gross National Product (GNP) and Net Domestic Product (NDP), measure different factors of economic performance. GNP considers the total economic output produced by the residents of a country, including those living abroad, while NDP adjusts GDP by accounting for depreciation of capital goods. The Economic Index is a less standardized term and does not refer specifically to a well-defined economic measure like GDP.