GDP measures the market value of all final goods and services produced within a country during a specific period. Intermediate goods, such as copper used by a manufacturer to produce a tap, are excluded to avoid double-counting. The value of the copper is already captured in the final price of the tap.

Gross Domestic Product (GDP) serves as the standard metric for quantifying the total market value of all final goods and services produced within a country during a specific period. It is the primary tool used by economists and policymakers to assess the health, size, and growth trajectory of a national economy over time.

A price deflator is a measure of the level of prices of all new, domestically produced, final goods and services in an economy. It is used to convert nominal values into real values by removing the effects of inflation. By dividing nominal GDP by the deflator, economists can determine the real purchasing power of a currency over time, allowing for accurate comparisons across different years.

Gross National Product (GNP) measures the total economic output produced by the citizens and businesses of a country, regardless of whether the production occurs domestically or abroad. It is a comprehensive indicator used to assess the overall economic performance and productive capacity of a nation's residents over a one-year period.

Per capita income is calculated by dividing the total national income of a country by its total population. It serves as a key indicator of the average economic standard of living and prosperity level of the citizens within that nation during a specific year.

Economic growth is measured as the percentage change in real GDP over a specific period. The formula is (New Value - Old Value) / Old Value, multiplied by 100 to express it as a percentage. In this case, it is the difference between the GDP of 2002 and 2001, divided by the GDP of the base year (2001), representing the growth rate achieved over that year.

Gross National Product (GNP) is defined as the total value of all final goods and services produced by the residents of a country, regardless of where the production takes place. Mathematically, GNP is calculated by taking GDP and adding the net income earned by domestic residents from foreign investments (net property income from abroad).

GNP is an aggregate measure of total production. It is calculated using components like private consumption, investment, government spending, and net exports (including net foreign investment). Per capita income is a derived statistic calculated by dividing the total national income by the population; it is an outcome of the GNP calculation, not a component required to compute it.

Nominal values are expressed in current prices, which can be misleading due to inflation or deflation. To calculate the real value, one must adjust the nominal figure by removing the effects of price changes, typically using a price index, to reflect constant purchasing power.

Gross Domestic Product (GDP) is defined as the total market value of all final goods and services produced within a specific geographic territory during a given period. It focuses on the location of production rather than the nationality of the producers, distinguishing it from Gross National Product (GNP), which measures output based on the ownership of the factors of production.