country's economy within its borders in a given time period. It includes all income earned by individuals, businesses, and the government within the country's borders. National income is an important economic indicator that helps economists and policymakers understand the overall health and performance of a country's economy. It can be measured using different methods, such as gross domestic product (GDP), gross national product (GNP), and net national product (NNP). Understanding national income is crucial for developing economic policies and making informed decisions about resource allocation, taxation, and public spending.