Why might per capita GDP be only an imperfect measure of a country's standard of living?

The Gross Domestic Product (GDP) is a measure of a country’s economic output or production, while per capita GDP is obtained by dividing that output by the population. Therefore, per capita GDP is an average measure of income distribution and is commonly used as an indicator of a country’s overall standard of living.

Per capita GDP doesn't account for income inequality in a country. If a few individuals or families own a substantial portion of a nation's wealth, the per capita GDP might be high, but the majority of the population might still have a low standard of living. Therefore, per capita GDP might not accurately represent the standard of living for an entire population.

Per capita GDP only counts goods and services produced and sold in the market, but it doesn't include non-market transactions such as the quality and accessibility of public services like healthcare, education, and infrastructure. These non-market transactions might significantly contribute to people's standard of living, but they are not included in per capita GDP calculations.

Per capita GDP doesn't consider quality of life factors, such as life expectancy, infant mortality rate, job satisfaction, environmental quality, crime rate, and political freedom. These factors play an essential role in determining the overall standard of living in a country, but they are not captured by per capita GDP.

The comparison of per capita GDP between countries might not accurately represent the standard of living due to differences in the cost of living and exchange rate fluctuations. Also, differences in social and economic structures, government policies, and cultural factors between countries can significantly impact the standard of living, whereas these are not accounted for in per capita GDP. In conclusion, per capita GDP might serve as a general indicator of a country's economic well-being, but it has limitations when measuring a country's standard of living or comparing it with other countries. It is essential to consider additional factors like income inequality, non-market transactions, quality of life, and country-specific factors to get a comprehensive understanding of a nation's standard of living.