p a2reg module to estimate models with two fixed effects p aaniv module to compute unbiased IV regression p aaplot module for scatter plot with linear and/or quadratic fit, automatically annotated p ab2022 module to provide Gradient Solver for Ahlfeldt & Barr (2022): The economics of skyscrapers p abar module to perform Arellano-Bond test for autocorrelation p abg module to implement the Alpha-Beta-Gamma Method of Distributional Analysis p aboutreg module providing tutorial on regression diagnostics p abrs 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" p absdid module to estimate treatment effect with Abadie semiparametric DID estimator p acelong module to fit multilevel mixed-effects ACE, AE and ADE variance decomposition models p acplot module to plot the autocorrelogram p acreg module to perform Arbitrary Correlation Regression p actest module to perform Cumby-Huizinga general test for autocorrelation in time series p addbefore module to add number or character before a variable p addinby module to add in data from a disk dataset using a foreign key p addnotes program to add notes to the end of text files p addplot module to add twoway plot objects to an existing twoway graph p addtex module to display text on a graph p addtxt module to add text to graphs p adecomp module to estimate Shapley Decomposition by Components of a Welfare Measure p adfmaxur module to calculate Leybourne (1995) ADFmax unit root test statistic along with 1, 5 and 10% finite-sample critical values and associated p-values p adftest module to perform ADF and Breusch-Godfrey tests p adjacent module to list adjacent values of variables p adjksm module to perform adjusted "ksm" for robust scatterplot smoothing p adjmean module to calculate variables' means adjusted for covariates p adjprop module to calculate adjusted probabilities from logistic regression estimates p adjust module (corrected) to compute adjusted predictions and probabilities after estimation p admetan module to provide comprehensive meta-analysis p adodev module to reorder ado-path for developers and other independent-minded users p adodown module making Stata packages easier to develop and document using modern tools p adoedit module to edit ado file in Stata's do-file editor p adoinstall module to install Stata packages in a specified path p adolist module to manage lists of ado packages p adostore module to store and restore the current ado-path p adotype module to type ado file p aedot module to produce dot plot for adverse event data p aefdr module to perform false discovery rate p-value adjustment for adverse event data p aevolcano module to produce volcano plot for adverse event data p aextlogit module to compute average elasticities for fixed effects logit p affiliationexposure module to compute an affiliation exposure model using two-mode actor(row)-by-event(column) network data p aformat module to condense the display format of a variable p aggind module to aggregate indicators among units within a specified radius p agrm module to calculate van der Eijk's measure of agreement "A" p aic_model_selection module to perform Forward Model Selection using AIC or BIC p ainequal module to compute measures of inequality p airnet module to create networks from airline traffic data p akdensity module to perform adaptive kernel density estimation p albatross module to create albatross plots p alignedpairs module to perform the aligned ranks test for matched pairs (Hodges-Lehmann) p alignedranks module to perform a two-sample aligned rank-sum (Hodges-Lehmann) test with exact statistics for small samples p alignedsets module to perform aligned ranks test for matched sets (Hodges-Lehmann) p alignmicro module to perform alignment in microsimulation p allcross modules to create variables corresponding to moment matrices p allpossible module to fit all possible models with subsets of predictors p allsubsets module to perform all subsets (combinatorial) meta-analysis in a set of studies p allsynth module to automate estimation of (i) bias-corrected synthetic control gaps ("treatment effects") p alluvial module for Alluvial graphs p almon Module to Estimate Shirley Almon Generalized Polynomial Distributed Lag Model p almon1 module to estimate Shirley Almon Polynomial Distributed Lag Model p alogit module to estimate (In)attentive logit regression from Abaluck and Adams p alorenz module to produce Pen's Parade, Lorenz and Generalised Lorenz curve p alphawgt module to compute Cronbach's alpha for weighted data p alsmle module to perform Beach-Mackinnon AR(1) Autoregressive Maximum Likelihood Estimation p amcmc module to provide Mata functions and structures for adaptive Markov chain Monte Carlo sampling p ameta module to perform alternative and Bayesian meta-analysis p anketest module to perform diagnostic tests for spatial autocorrelation in the residuals of OLS, SAR, IV, and IV-SAR models p anogi module to generate Analysis of Gini p anovaplot module for plots of anova fit, including interaction plots p anymatch module to perform distance matching based on any metric p anythingtodate module to convert all types of date variables to Stata date variables p apc module for estimating age-period-cohort effects p apcd module for estimating age-period-cohort effects with detrended coefficients p apcgo module to calculate age-period-cohort effects for the gap between two groups (based on a Blinder-Oaxaca decomposition), including trends for each parameter p apch module for estimating age-period-cohort and hysteresis effects p apoverty module to compute poverty measures p appendfile module to append text files p archlm module to calculate LM test for ARCH effects p archqq module to generate Q-Q plot and distribution tests for ARCH models p arcplot module for arc plots p ardl module to perform autoregressive distributed lag model estimation p arhomme module to estimate Arellano and Bonhomme quantile selection model p arimaauto module to find the best ARIMA model with the help of a Stata-adjusted Hyndman-Khandakar (2008) algorithm p arimafit module to calculate AIC, SIC for ARIMA model p arimasel module to compute selection criteria for ARMA(p,q) models p armadiag module to compute post-estimation residual diagnostics for time series p armaroots module to compute roots of AR- and MA-polynomials p array package to support arrays of variables p arrowplot module to produce combined plot for graphing inter-group and intra-group trends p art module to compute sample size and power for complex randomised trial designs with binary or time-to-event outcomes p artbin module to calculate sample size or power for randomized trials with binary outcomes p artcat module to calculate sample size or power for a two-group trial with ordered categorical outcome p ascii module to display the ASCII character set p asciiplot module to generate ASCII character map p ascol module to convert frequency of stock returns or stock prices p ascvd module to compute ACC/AHA 10-year risk for an initial hard atherosclerotic cardiovascular disease (ASCVD) event p asdoc module to create high-quality tables in MS Word from Stata output p asgen module to generate weighted average mean using an existing variable as weight p ashell module to capture output from OS shell command p asl_norm module computing bootstrap Gaussianity tests p asreg module to estimate rolling window regressions, Fama-MacBeth and by(group) regressions p asrol module to generate rolling window / groups descriptive statistics p assertky module to assert unique dataset keys p astile module to provide a faster and byable alternative for xtile p astx module to create a table of descriptive statistics and t-statistics by a grouping variable p atkplot module to generate Atkinson residual normality plots p attregtest module to implement the regression-based attrition tests proposed in Ghanem et al. (2022) p audit_cc module for analysis of matched case-control audits of cervical cancer screening p autofill module to fill missing values with existing values p autofmt module to automatically format a significant number of digits p autolog module to generate dialog to create log files p autorename module to automatically rename variables p autosum module to produce automatic generation of a comparison table p avar module to perform asymptotic covariance estimation for iid and non-iid data robust to heteroskedasticity, autocorrelation, 1- and 2-way clustering, and common cross-panel autocorrelated disturbances p avciplot module to produce added-variable plot with confidence intervals p avg_effect module to calculate mean (standardized) effect size across multiple outcomes p avicplot module to produce added-variable plot with confidence intervals p avplot2 modules for added variable plots p avplot3 module to generate partial regression plots for subsamples p avplots4 module to graph added-variable plots for specified regressors in a single image