According to the World Bank's definition, the Gini coefficient reflects the distribution of income and consumer spending among different households. Most countries in the world count the distribution of income and define income as disposable income after tax, but there are also some countries Statistics are on the distribution of consumer spending. In India, for example, due to the diminishing marginal propensity to consume, the Gini coefficient calculated using consumer expenditure will be significantly lower than the Gini coefficient calculated using income. For example, the Gini coefficient of India published by the World Bank in 2005 was 0.33. However, if measured by the income index, it will exceed 0.6; on the contrary, if China's Gini coefficient is calculated using the consumption expenditure method, China's Gini coefficient in 200 will only be 0.26. The above mosquito is intended to illustrate? ['Problems with Gini Coefficient Calculation in India.', 'Differences in current Gini coefficient calculations affect comparability between countries.', 'Reasonable use of after-tax income to calculate the Gini coefficient.', "China's Gini coefficient is overestimated."]