Net National Income (NNI) is an economic measure that represents the total income earned by a nation's residents, including wages, profits, rents, and taxes, minus depreciation. It reflects the overall economic health of a country and is an important indicator for assessing living standards and economic performance. NNI is derived from Gross National Income (GNI) by subtracting the value of capital consumed in the production process. This adjustment accounts for the wear and tear on physical assets, providing a clearer picture of the income available for consumption and savings within a nation, making it a vital statistic for policymakers and economists.