Subject(s): Social medicine. -- Measuring health -- Measuring inequality : Income inequality -- How can economic inequality influence health : Social comparisons, lower trust, political mechanisms, violence and crime, purchasing-power effects -- Correlation or causality- interpreting scatter plots and regressions : higher income and better health, economic significance -- Ecological fallacy- what conclusions can be drawn from group averages, income inequality and health, searching for inequality effect- social comparisons, social trust, political mechanisms, violence and crime, inequality and purchasing power