I need help to have the command which is used in this paper of Rios Avila (2019) to have the results the derminants of income inequality in USA

Rios Avila, Fernando, Recentered Influence Functions in Stata: Methods for Analyzing the Determinants of Poverty and Inequality (April 26, 2019). Levy Economics Institute, Working Paper 927 (2019). Available at SSRN: https://ssrn.com/abstract=3378811 or http://dx.doi.org/10.2139/ssrn.3378811