Solution:Net Domestic Product (NDP) is an annual measure of the economic output of a nation that is calculated by subtracting depreciation from Gross Domestic Product (GDP). It means, Net Domestic Product Gross Domestic Product-Depreciation Hence, Statement I is incorrect while Statement II is also not true.Per Capita Income is the average income earned per person in a nation or geographic region in a specified year. It can be calculated by dividing National Income (Net National Product) from the total population of the nation.
Only Statement III is correct as Net Domestic Product is the better metrics than Gross Domestic Product for comparing the economies of the world, since the former also reveals the amount of investment spent on improving the obsolete equipments to maintain the production level.
An increase in depreciation alone can push up the GDP level, but it does not indicate improvements in that country's social and economic well-being.