# StataCorp LP

# Stata Technical Bulletin

This journal is no longer published by StataCorp LP. For a followup journal, see Stata Journal, published by StataCorp LP.
**Editor:** **For corrections or technical questions regarding this series, please contact (Christopher F. Baum) or (Lisa Gilmore)**

**Series handle:**repec:tsj:stbull

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### 1999, Volume 8, Issue 48

### 1999, Volume 8, Issue 47

**y:1999:v:8:i:47:sg100 Two-stage linear constrained estimation***by*Jeroen Weesie**y:1999:v:8:i:47:sg101 Pairwise comparisons of means, including the Tukey wsd method***by*John R. Gleason**y:1999:v:8:i:47:sg102 Zero-truncated Poisson and negative binomial regression***by*Joseph Hilbe**y:1999:v:8:i:47:sg103 Within subjects (repeated measures) ANOVA, including between subjects factors***by*John R. Gleason**y:1999:v:8:i:47:sbe25 Two methods for assessing the goodness-of-fit of age-specific reference intervals***by*Eileen Wright & Patrick Royston**y:1999:v:8:i:47:sbe26 Assessing the influence of a single study in the meta-anyalysis estimate***by*Aurelio Tobias**y:1999:v:8:i:47:gr34 Drawing Venn diagrams***by*Jens M. Lauritsen**y:1999:v:8:i:47:sg99 Multiple regression with missing observations for some variables***by*Mead Over

### 1999, Volume 8, Issue 46

**y:1999:v:8:i:46:gr29.1 Correction to labgraph***by*Jon Faust**y:1999:v:8:i:46:sg89.2 Correction to the adjust command***by*Kenneth Higbee**y:1999:v:8:i:46:sts13 Time series regression for counts allowing for autocorrelation***by*Aurelio Tobias & Michael J. Campbell**y:1999:v:8:i:46:gr32 Confidence ellipses***by*Anders Alexandersson**y:1999:v:8:i:46:gr33 Violin plots***by*Thomas J. Steichen**y:1999:v:8:i:46:dm63 Dialog box window for browsing, editing, and entering observations***by*Tony Brady**y:1999:v:8:i:46:dm64 Quantiles of the studentized range distribution***by*John R. Gleason**y:1999:v:8:i:46:sg94 Right, left, and uncensored Poisson regression***by*Joseph Hilbe & Dean H. Judson**y:1999:v:8:i:46:sg95 Geographically weighted regression: A method for exploring spatial nonstationarity***by*Mark S. Pearce**y:1999:v:8:i:46:sg96 Zero-inflated Poisson and negative binomial regression models***by*Jesper B. Sorensen**y:1999:v:8:i:46:sg97 Formatting regression output for published tables***by*John Luke Gallup**y:1999:v:8:i:46:sg98 Poisson regression with a random effect***by*David Clayton

### 1999, Volume 8, Issue 45

**y:1999:v:8:i:45:ip14.1 Programming utility: numeric lists (correction and extension)***by*Jeroen Weesie**y:1999:v:8:i:45:sbe18.1 Update of sampsi***by*Paul T. Seed**y:1999:v:8:i:45:sbe24.1 Correction to funnel plot***by*Michael J. Bradburn & Jonathan J. Deeks & Douglas G. Altman**y:1999:v:8:i:45:sg84.1 Concordance correlation coefficient, revisited***by*Thomas J. Steichen & Nicholas J. Cox**y:1999:v:8:i:45:sg89.1 Correction to the adjust command***by*Kenneth Higbee**y:1999:v:8:i:45:ip26 Bivariate results for each pair of variables in a list***by*Nicholas J. Cox**y:1999:v:8:i:45:ip27 Results for all possible combinations of arguments***by*Nicholas J. Cox**y:1999:v:8:i:45:gr29 labgraph: placing text labels on two-way graphs***by*Jon Faust**y:1999:v:8:i:45:gr30 A set of 3D-programs***by*Guy D. van Melle**y:1999:v:8:i:45:gr31 Graphical representation of follow-up by time bands***by*Adrian Mander**y:1999:v:8:i:45:dm60 Digamma and trigamma functions***by*Joseph Hilbe**y:1999:v:8:i:45:dm61 A tool for exploring Stata datasets (Windows and Macintosh only)***by*John R. Gleason**y:1999:v:8:i:45:dm62 Joining episodes in multi-record survival time data***by*Jeroen Weesie**y:1999:v:8:i:45:sg90 Akaike's information criterion and Schwarz's criterion***by*Aurelio Tobias & Michael J. Campbell**y:1999:v:8:i:45:sg91 Robust variance estimators for MLE Poisson and negative binomial regression***by*Joseph Hilbe**y:1999:v:8:i:45:sg92 Logistic regression for data including multiple imputations***by*Christopher Paul**y:1999:v:8:i:45:sg93 Switching regressions***by*Frederic Zimmerman**y:1999:v:8:i:45:svy7 Two-way contingency tables for survey or clustered data***by*William M. Sribney

### 1999, Volume 8, Issue 44

**y:1999:v:8:i:44:sbe19.1 Tests for publication bias in meta-analysis***by*Thomas J. Steichen & Matthias Egger & Jonathan Sterne**y:1999:v:8:i:44:ssa12 Predicted survival curves for the Cox proportional hazards model***by*Joanne Garrett**y:1999:v:8:i:44:sge24 metan-an alternative meta-analysis command***by*Michael J. Bradburn & Jonathan J. Deeks & Dennis G. Altman**y:1999:v:8:i:44:dm59 Collasping datasets to frequencies***by*Nicholas J. Cox**y:1999:v:8:i:44:sg85 Moving summaries***by*Nicholas J. Cox**y:1999:v:8:i:44:sg86 Continuation-ratio models for ordinal response data***by*Rory Wolfe**y:1999:v:8:i:44:sg87 Windmeijer's goodness-of-fit test for logistic regression***by*Jeroen Weesie**y:1999:v:8:i:44:sg88 Estimating generalized ordered logit models***by*Vincent Kang Fu**y:1999:v:8:i:44:sg89 Adjusted predictions and probabilities after estimation***by*Kenneth Higbee

### 1999, Volume 8, Issue 43

**y:1999:v:8:i:43:sbe16.2 Corrections to the meta-analysis command***by*Stephen Sharp & Jonathan Sterne**y:1999:v:8:i:43:sg33.1 Enhancements for calculation of adjusted means and adjusted proportions***by*Joanne Garrett**y:1999:v:8:i:43:ip25 Parameterized Monte Carlo simulations: An enhancement to the simulation command***by*Jeroen Weesie**y:1999:v:8:i:43:dm55 Generating sequences and patterns of numeric data: an extension to egen***by*R. Mark Esman**y:1999:v:8:i:43:dm56 A labels editor for Windows and Macintosh***by*John R. Gleason**y:1999:v:8:i:43:dm57 A notes editor for Windows and Macintosh***by*John R. Gleason**y:1999:v:8:i:43:dm58 A package for the analysis of husband-wife data***by*Jeroen Weesie**y:1999:v:8:i:43:an66 STB-37 through STB-42 available in bound format***by*Patricia Branton**y:1999:v:8:i:43:sg81 Multivariable fractional polynomials***by*Patrick Royston & Gareth Ambler**y:1999:v:8:i:43:sg82 Fractional polynomials for st data***by*Patrick Royston**y:1999:v:8:i:43:sg83 Parameter estimation for the Gumbel distribution***by*Manuel G. Scotto & Aurelio Tobias**y:1999:v:8:i:43:sg84 Concordance correlation coefficient***by*Thomas J. Steichen & Nicholas J. Cox

### 1998, Volume 7, Issue 42

**y:1998:v:7:i:42:sbe16.1 New syntax and output for the meta-analysis command***by*Stephen Sharp & Jonathan Sterne**y:1998:v:7:i:42:sg42.2 Displaying predicted probabilities from probit or logit regression***by*Mead Over**y:1998:v:7:i:42:snp14 A two-sample multivariate nonparametric test***by*Andrew M. Perkins**y:1998:v:7:i:42:sbe21 Adjusted population attributable fractions from logistic regression***by*Anthony R. Brady**y:1998:v:7:i:42:sbe22 Cumulative meta-analysis***by*Jonathan Sterne**y:1998:v:7:i:42:sbe23 Meta-analysis regression***by*Stephen Sharp**y:1998:v:7:i:42:gr28 A graphical procedure to test equality of variances***by*Aurelio Tobias**y:1998:v:7:i:42:dm54 Capturing comments from data dictionaries***by*John R. Gleason**y:1998:v:7:i:42:sg76 An approximate likelihood-ratio test for ordinal response models***by*Rory Wolfe & William Gould**y:1998:v:7:i:42:sg77 Regression analysis with multiplicative heteroscedasticity***by*Jeroen Weesie**y:1998:v:7:i:42:sg78 Simple and multiple correspondence analysis in Stata***by*Philippe Van Kerm**y:1998:v:7:i:42:sg79 Generalized additive models***by*Patrick Royston & Gareth Ambler**y:1998:v:7:i:42:sg80 Indirect standardization***by*Mario Cleves

### 1998, Volume 7, Issue 41

**y:1998:v:7:i:41:ssa10.1 Update to analysis of follow-up studies with Stata 5.0***by*David Clayton & Michael Hills**y:1998:v:7:i:41:gr16.2 Corrections to condraw.ado***by*J. Patrick Gray & Nicholas J. Cox**y:1998:v:7:i:41:sg44.1 Correction to random number generators***by*Joseph Hilbe & Walter Linde-Zwirble**y:1998:v:7:i:41:sg53.2 Stata-like commands for complementary log-log regression***by*Joseph Hilbe**y:1998:v:7:i:41:ssa11 Survival analysis with time-varying covariates***by*Jeroen Weesie**y:1998:v:7:i:41:sbe19 Tests for publication bias in meta-analysis***by*Thomas J. Steichen**y:1998:v:7:i:41:sbe20 Assessing heterogeneity in meta-analysis: the Galbraith plot***by*Aurelio Tobias**y:1998:v:7:i:41:ip23 Expansion and display of if expressions***by*Thomas J. Steichen**y:1998:v:7:i:41:ip24 Timing portions of a program***by*Frederic Zimmerman**y:1998:v:7:i:41:gr27 An adaptive variable span running line smoother***by*Peter Sasieni**y:1998:v:7:i:41:dm53 Detection and deletion of duplicate observations***by*Thomas J. Steichen & Nicholas J. Cox**y:1998:v:7:i:41:sg75 Geometric means and confidence intervals***by*John Carlin & Suzanna Vidmar & Carlos Ramalheira**y:1998:v:7:i:41:sed9.1 Pointwise confidence intervals for running***by*Peter Sasieni & Patrick Royston**y:1998:v:7:i:41:sxd1 Random allocation of treatments in blocks***by*Philip Ryan**y:1998:v:7:i:41:tt7 Random walk tutorial***by*Albert Verbeek & Jeroen Weesie

### 1998, Volume 7, Issue 40

**y:1998:v:7:i:40:sbe13.3 Correction to age-specific reference intervals ("normal ranges")***by*Eileen Wright & Patrick Royston**y:1998:v:7:i:40:gr24.1 Easier bar charts: corrections***by*Nicholas J. Cox**y:1998:v:7:i:40:gr25.1 Spike plots for histograms, rootograms, and time series plots, update***by*Nicholas J. Cox & Anthony R. Brady**y:1998:v:7:i:40:ssa10 Analysis of follow-up studies with Stata 5.0***by*David Clayton & Michael Hills**y:1998:v:7:i:40:sbe18 Sample size calculations for clinical trials with repeated measures data***by*Paul Seed**y:1998:v:7:i:40:ip20 Checking for sufficient memory to add variables***by*Peter Sasieni**y:1998:v:7:i:40:ip21 Storing commands in the keyboard buffer (Windows and Macintosh only)***by*Jeroen Weesie**y:1998:v:7:i:40:ip22 Parsing options with embedded parentheses***by*Jeroen Weesie**y:1998:v:7:i:40:stata49 Interrater agreement***by*William Gould**y:1998:v:7:i:40:stata50 Changes to ttset and sdtest***by*William M. Sribney**y:1998:v:7:i:40:dm50 Defining variables and recording their definitions***by*John R. Gleason**y:1998:v:7:i:40:dm51 Defining and recording variable orderings***by*John R. Gleason**y:1998:v:7:i:40:dm52 Executing a command on a subset of the data***by*Peter Sasieni**y:1998:v:7:i:40:sg73 Table making programs***by*John H. Tyler**y:1998:v:7:i:40:sg74 Symmetry and marginal homogeneity test/Transmission-Disequilibrium Test (TDT)***by*Mario Cleves**y:1998:v:7:i:40:svy6 Versions of mlogit, ologit, and oprobit for survey data***by*John L. Eltinge & William M. Sribney

### 1998, Volume 7, Issue 39

**y:1998:v:7:i:39:sbe17 Discrete time proportional hazards regression***by*Stephen P. Jenkins**y:1998:v:7:i:39:ip19 Using expressions in Stata commands***by*Jeroen Weesie**y:1998:v:7:i:39:stata47 lookup now indexes on-line FAQs***by*William Gould**y:1998:v:7:i:39:stata48 Updated reshape***by*William Gould**y:1998:v:7:i:39:dm49 Some new matrix commands***by*Jeroen Weesie**y:1998:v:7:i:39:sg72 Newey-West standard errors for probit, logit, and poisson models***by*James W. Hardin

### 1998, Volume 7, Issue 38

**y:1998:v:7:i:38:snp13 Nonparametric assessment of multimodality for univariate data***by*Isaias Hazarmabeth Salgado-Ugarte & Makoto Shimizu & Toru Taniuchi**y:1998:v:7:i:38:sbe15 Age-specific reference intervals for normally distributed data***by*Eileen Wright & Patrick Royston**y:1998:v:7:i:38:sbe16 Meta-analysis***by*Stephen Sharp & Jonathan Sterne**y:1998:v:7:i:38:smv3.2 Enhancements to discriminant analysis***by*Joseph Hilbe**y:1998:v:7:i:38:dm48 An enhancement of reshape***by*Jeroen Weesie**y:1998:v:7:i:38:sg70 Interquartile and simultaneous-quantile regression***by*William Gould**y:1998:v:7:i:38:sg71 Routines to maximize a function***by*Christopher Ferrall

### 1998, Volume 7, Issue 37

**y:1998:v:7:i:37:ip17 While loops from the command line***by*John R. Gleason**y:1998:v:7:i:37:ip18 A command for randomly resampling a dataset***by*John R. Gleason**y:1998:v:7:i:37:gr26 Bin smoothing and summary on scatter plots***by*Nicholas J. Cox**y:1998:v:7:i:37:dm44 Sequences of integers***by*Nicholas J. Cox**y:1998:v:7:i:37:dm45 Changing string variables to numeric***by*Nicholas J. Cox**y:1998:v:7:i:37:dm46 Enhancement to the sample command***by*Jeroen Weesie**y:1998:v:7:i:37:dm47 Verifying value label mappings***by*Jeroen Weesie**y:1998:v:7:i:37:an64 STB-31 through STB-36 available in bound format***by*Patricia Branton**y:1998:v:7:i:37:an65 Memorium for Stewart West***by*Joseph Hilbe**y:1998:v:7:i:37:ssa9.1 Survival analysis subroutine for programmers***by*William Gould**y:1998:v:7:i:37:smv7 Inference on principal components***by*Jeroen Weesie**y:1998:v:7:i:37:ssa9 Cox proportional hazards model with the exact calculation for ties***by*William Gould

### 1997, Volume 6, Issue 36

**y:1997:v:6:i:36:sbe13.2 Correction to age-specific reference intervals ("normal ranges")***by*Eileen Wright & Patrick Royston**y:1997:v:6:i:36:gr16.1 Convex hull plots***by*Nicholas J. Cox**y:1997:v:6:i:36:sbe14 Odds ratios and confidence intervals for logistic regression models with effect modification***by*Joanne Garrett**y:1997:v:6:i:36:ip16 Using dialog boxes to vary program parameters***by*H. Joseph Newton**y:1997:v:6:i:36:gr24 Easier bar charts***by*Nicholas J. Cox**y:1997:v:6:i:36:gr25 Spike plots for histograms, rootograms, and time-series plots***by*Nicholas J. Cox & Anthony R. Brady**y:1997:v:6:i:36:sg67 Univariate summaries with boxplots***by*John R. Gleason**y:1997:v:6:i:36:sg68 Goodness-of-fit statistics for multinomial distributions***by*Jeroen Weesie**y:1997:v:6:i:36:sg69 Immediate Mann-Whitney and binomial effect-size display***by*Richard Goldstein

### 1997, Volume 6, Issue 35

**y:1997:v:6:i:35:sbe13.1 Correction to age-specific reference intervals ("normal ranges")***by*Eileen Wright & Patrick Royston**y:1997:v:6:i:35:ip14 Programming utility: Numeric lists***by*Jeroen Weesie**y:1997:v:6:i:35:ip15 A dialog box layout manager for Stata***by*Timothy J. Schmidt**y:1997:v:6:i:35:gr22 Binomial smoothing plot***by*Nicholas J. Cox**y:1997:v:6:i:35:gr23 Graphical assessment of the Cox model proportional assumption***by*Joanne Garrett**y:1997:v:6:i:35:dm43 Automatic recording of definitions***by*Jeroen Weesie**y:1997:v:6:i:35:sg63 Logistic regression: standardized coefficients and partial correlations***by*Joseph Hilbe**y:1997:v:6:i:35:sg64 pwcorrs: An enhanced correlation display***by*Fred Wolfe**y:1997:v:6:i:35:sg65 Computing interclass correlations and large ANOVAs***by*John R. Gleason**y:1997:v:6:i:35:sg66 Enhancements to the alpha command***by*Jeroen Weesie

### 1997, Volume 6, Issue 34

**y:1997:v:6:i:34:os16.1 Importing Stata graphs into word processors on the Macintosh: Part 2***by*Chinh Nguyen**y:1997:v:6:i:34:sts12 A periodogram-based test for white noise***by*H. Joseph Newton**y:1997:v:6:i:34:ip13 Maximum-likelihood estimation using the ml command***by*William Gould**y:1997:v:6:i:34:sbe13 Age-specific reference intervals (“normal ranges”)***by*Eileen Wright & Patrick Royston**y:1997:v:6:i:34:gr20 Low-level graphics in data coordinates***by*H. Joseph Newton & James W. Hardin**y:1997:v:6:i:34:gr21 Flexible axis scaling***by*Patrick Royston**y:1997:v:6:i:34:dt3.1 An updated utility to convert EpiInfo datasets***by*R. Mark Esman**y:1997:v:6:i:34:smv3.1 Discriminant analysis: An enhanced command***by*Joseph Hilbe

### 1997, Volume 6, Issue 33

**y:1997:v:6:i:33:sg42.1 Extensions to the regpred command***by*Mead Over**y:1997:v:6:i:33:sg49.1 An improved command for paired t tests: Correction***by*John R. Gleason**y:1997:v:6:i:33:snp12 Stratified test for trend across ordered groups***by*Peter Sasieni**y:1997:v:6:i:33:sed2.1 Update to pattern***by*Richard Goldstein**y:1997:v:6:i:33:sg57 An immediate command for two-way tables***by*Nicholas J. Cox**y:1997:v:6:i:33:sg58 Mountain plots***by*Richard Goldstein**y:1997:v:6:i:33:sg59 Index of ordinal variation and Neyman-Barton GOF***by*Richard Goldstein**y:1997:v:6:i:33:sg60 Enhancements for the display of estimation results***by*Jeroen Weesie**y:1997:v:6:i:33:sg61 Bivariate probit models***by*James W. Hardin**y:1997:v:6:i:33:sg62 Hildreth-Houck random coefficients model***by*James W. Hardin

### 1997, Volume 6, Issue 32

**y:1997:v:6:i:32:snp11 Test for trend across ordered groups revisited***by*Peter Sasieni & Katarzyna A. Stepniewska & Douglas G. Altman**y:1997:v:6:i:32:sts11 Hildreth-Lu regression***by*James W. Hardin**y:1997:v:6:i:32:os16 Importing Stata graphs into word processors on the Macintosh***by*Chinh Nguyen**y:1997:v:6:i:32:dm42 Accrue statistics for a command across a by list***by*James W. Hardin**y:1997:v:6:i:32:crc44 Confidence intervals in a 2 x 2 table***by*Peter Sasieni**y:1997:v:6:i:32:sg51 Inference about correlations using the Fisher z-transform***by*John R. Gleason**y:1997:v:6:i:32:sg52 Testing dependent correlation coefficients***by*Richard Goldstein**y:1997:v:6:i:32:sg53 Maximum-likelihood complementary log-log regression***by*Joseph Hilbe**y:1997:v:6:i:32:sg54 Extended probit regression***by*Joseph Hilbe**y:1997:v:6:i:32:sg55 Extensions to the brier command***by*Richard Goldstein**y:1997:v:6:i:32:sg56 An ado-file implementation of a simplex-based maximization algorithm***by*Tavis Barr**y:1997:v:6:i:32:an61 Submission guidelines***by*H. Joseph Newton**y:1997:v:6:i:32:sed2 Patterns of missing data***by*Richard Goldstein**y:1997:v:6:i:32:dt3 Reading Epilnfo datasets into Stata***by*R. Mark Esman

### 1997, Volume 6, Issue 31

**y:1997:v:6:i:31:an59 Statement from the new editor***by*H. Joseph Newton**y:1997:v:6:i:31:an60 STB-25STB-30 available in bound format***by*Patricia Branton**y:1997:v:6:i:31:svy1 Some basic concepts for design-based analysis of complex survey data***by*John L. Eltinge & William M. Sribney**y:1997:v:6:i:31:svy2 Estimation of means, totals, ratios, and proportions for survey data***by*John L. Eltinge & William M. Sribney**y:1997:v:6:i:31:svy3 Describing survey data: sampling design and missing data***by*John L. Eltinge & William M. Sribney**y:1997:v:6:i:31:svy4 Linear, logistic, and probit regressions for survey data***by*John L. Eltinge & William M. Sribney**y:1997:v:6:i:31:svy5 Estimates of linear combinations and hypothesis tests for survey data***by*John L. Eltinge & William M. Sribney

### 1996, Volume 5, Issue 30

**y:1996:v:5:i:30:snp10 Nonparametric regression: Kernel, WARP, ad k-NN estimators***by*Isaias Hazarmabeth Salgado-Ugarte & Makoto Shimizu & Toru Taniuchi**y:1996:v:5:i:30:dm41 Online documentation for _result() contents***by*John R. Gleason**y:1996:v:5:i:30:sg49 An improved command for paired t tests***by*John R. Gleason**y:1996:v:5:i:30:sg50 Graphical assessment of linear trend***by*Joanne Garrett**y:1996:v:5:i:30:an58 Change of editors***by*Sean Becketti**y:1996:v:5:i:30:ip8.1 An even more enhanced for command***by*Patrick Royston

### 1996, Volume 5, Issue 29

**y:1996:v:5:i:29:dm27.1 Correction to improved collapse***by*William Gould**y:1996:v:5:i:29:ip11 A tool for manipulating s_#objects***by*John R. Gleason**y:1996:v:5:i:29:ip12 Parsing tokens in Stata***by*Sean Becketti & Peter Sasieni**y:1996:v:5:i:29:gr18 Graphing high-dimensional data using parallel coordinates***by*John R. Gleason**y:1996:v:5:i:29:gr19 Misleading or confusing boxplots***by*John C. Nash**y:1996:v:5:i:29:dm37 Extended merge capabilities***by*Jon Faust**y:1996:v:5:i:29:dm38 A more automated merge procedure***by*Robert M. Farmer**y:1996:v:5:i:29:dm39 Using .hlp files to document data analysis***by*Michael Hills