Inequality Measurement, Decomposition, and Poverty Analysis // Tools for measuring income and wealth inequality. Computes the Gini coefficient with bootstrap or asymptotic confidence intervals following Davidson (2009) doi:10.1016/j.jeconom.2008.09.011, the extended S-Gini family, Theil T and L indices (generalised entropy family), the Atkinson index, the Kolm absolute inequality index, Palma ratio, Hoover index, percentile ratios, and Lorenz curves. Supports between-within group decomposition following Bourguignon (1979) doi:10.2307/1914138, income share tabulation, concentration indices for health inequality with Erreygers (2009) correction, Kakwani tax progressivity and Reynolds-Smolensky redistribution indices, Foster-Greer- Thorbecke poverty measures including the Sen index, growth incidence curves following Ravallion and Chen (2003) doi:10.1016/S0165-1765(02)00205-7, and Wolfson polarisation. All functions accept optional survey weights and work with data from any source.