This document discusses concepts related to measuring national income, including gross domestic product (GDP), net domestic product (NDP), gross national product (GNP), and net national product (NNP). It describes how national income is the total value of all final goods and services produced within a nation in a year. National income can be measured using several methods, including the product method, income method, and expenditure method. The document also notes some challenges in accurately measuring national income.
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