In recent years, although the ratio of urban to rural per capita income in China has exhibited a continuous downward trend, the income gap between urban and rural areas remains significantly higher than that of developed countries. Addressing this inequality and achieving common prosperity has...

This paper analyzes the inequalities and convergence across countries using data on the top 100 players in chess and tennis. We explore the impact of time trends and exogenous global shocks on countries' representation in the top 100 players' lists in a manner akin to a natural experiment,...