Statistical Software Components
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- _GAPPORT: Stata module to calculates seats in party-list proportional representation

- Ulrich Kohler
- _GCLSORT: Stata module to sort a single variable via egen

- Philippe Van Kerm
- _GDISTINCT: Stata module providing egen function to count distinct values

- Noah Case
- _GPROD: Stata module to extend egen for product of observations

- Philip Ryan
- _GRMEDF: Stata module to compute row medians with egen

- Stanislav Kolenikov
- _GRNDRAW: Stata module for random number generation from the GB2, Singh-Maddala, Dagum, Fisk and Pareto distributions

- Philippe Van Kerm
- _GRPOS: Stata module to identify observations with at least n positive values

- Fred Wolfe
- _GRPROD: Stata module to extend generate to produce row products

- Philip Ryan
- _GSLOPE: Stata module to compute simple regression slope

- Jeroen Weesie
- _GSOUNDEX: Stata module to implement soundex algorithm

- Michael Blasnik
- _GSTD01: Stata modules to standardize a variable

- Stanislav Kolenikov
- _GVRELDIF: Stata module to compute relative difference between successive observations

- Stanislav Kolenikov
- _GWMEAN: Stata module to compute optionally weighted means

- Gueorgui Kolev
- _GWTMEAN: Stata module containing extensions to generate to implement weighted mean

- David Kantor
- _PEERS: Stata module to allow egen to compute the average characteristics of peers in a given unit (school, firm, etc.) specified by by()

- Amine Ouazad
- A2REG: Stata module to estimate models with two fixed effects

- Amine Ouazad
- AANIV: Stata module to compute unbiased IV regression

- Austin Nichols
- AAPLOT: Stata module for scatter plot with linear and/or quadratic fit, automatically annotated

- Nicholas Cox
- AB2022: Stata module to provide Gradient Solver for Ahlfeldt & Barr (2022): The economics of skyscrapers

- Gabriel Ahlfeldt
- ABAR: Stata module to perform Arellano-Bond test for autocorrelation

- David Roodman
- ABG: Stata module to implement the Alpha-Beta-Gamma Method of Distributional Analysis

- Louis Chauvel
- ABLAGS: RATS procedure to generate Arellano-Bond set of instruments

- Tom Doan
- ABOUTREG: Stata module providing tutorial on regression diagnostics

- Stanislav Kolenikov
- ABRS: Stata module to provide Toolkit for counterfactuals based on a spatial equilibrium framework with heterogenous preferences by Ahlfeldt, Bald, Roth, Seidel: “Measuring quality of life under spatial frictions"

- Gabriel Ahlfeldt
- ABRSQOL: Stata module providing Quality-of-life solver for "Measuring quality of life under spatial frictions"

- Gabriel Ahlfeldt, Fabian Bald, Duncan Roth and Tobias Seidel
- ABSDID: Stata module to estimate treatment effect with Abadie semiparametric DID estimator

- Kenneth Houngbedji
- ACELONG: Stata module to fit multilevel mixed-effects ACE, AE and ADE variance decomposition models

- Volker Lang
- ACREG: Stata module to perform Arbitrary Correlation Regression

- Fabrizio Colella, Rafael Lalive, Seyhun Sakalli and Mathias Thoenig
- ACTEST: GAUSS module to Apply Asymmetric Causality Tests

- Abdulnasser Hatemi-J
- ACTEST: Stata module to perform Cumby-Huizinga general test for autocorrelation in time series

- Christopher Baum and Mark Schaffer
- ADDBEFORE: Stata module to add number or character before a variable

- Haitao Si, Yuan Xue and Muhammad Usman
- ADDINBY: Stata module to add in data from a disk dataset using a foreign key

- Roger Newson
- ADDNOTES: Stata program to add notes to the end of text files

- Jeffrey Arnold
- ADDPLOT: Stata module to add twoway plot objects to an existing twoway graph

- Ben Jann
- ADDTEX: Stata module to display text on a graph

- Guy D. van Melle
- ADDTXT: Stata module to add text to graphs

- Gary Longton
- ADECOMP: Stata module to estimate Shapley Decomposition by Components of a Welfare Measure

- João Pedro Azevedo, Minh Nguyen and Viviane Sanfelice
- ADFAUTOSELECT: RATS procedure to select optimal lag length to be used for an ADF test

- Tom Doan
- ADFMAXUR: Stata module to calculate Leybourne (1995) ADFmax unit root test statistic along with 1, 5 and 10% finite-sample critical values and associated p-values

- Jesus Otero and Christopher Baum
- ADFREG: MATLAB module to calculate augmented Dickey-Fuller regression

- Ludwig Kanzler
- ADFTEST: Stata module to perform ADF and Breusch-Godfrey tests

- Rafal Wozniak
- ADJACENT: Stata module to list adjacent values of variables

- Nicholas Cox
- ADJKSM: Stata module to perform adjusted "ksm" for robust scatterplot smoothing

- Isaías Salgado-Ugarte and Makoto Shimizu
- ADJMEAN: Stata module to calculate variables' means adjusted for covariates

- Joanne M. Garrett
- ADJPROP: Stata module to calculate adjusted probabilities from logistic regression estimates

- Joanne M. Garrett
- ADJUST: Stata module (corrected) to compute adjusted predictions and probabilities after estimation

- Kenneth Higbee
- ADMETAN: Stata module to provide comprehensive meta-analysis

- David Fisher
- ADODEV: Stata module to reorder ado-path for developers and other independent-minded users

- Roger Newson
- ADODOWN: Stata module making Stata packages easier to develop and document using modern tools

- Team Lsms
- ADOEDIT: Stata module to edit ado file in Stata's do-file editor

- Dan Blanchette