What’s new on www.stata.com

Whenever we update a page, we list it below:

• Visit us at APS 2012: May 24–27 (Added 03 February 2012)
• Resources FAQ: The Statalist FAQ (Updated 01 February 2012)
• Resources FAQ: History of Stata (Updated 30 January 2012)
• Stata 12 manual errata (Updated 30 January 2012)
• Data management FAQ: Replacing missing values (Updated 26 January 2012)
• Summer School on Modern Methods in Biostatistics and Epidemiology (Added 20 January 2012)
• Statistical methods for population-based cancer survival analysis (Added 20 January 2012)
• 2012 German Stata Users Group meeting: Call for presentations (Added 16 December 2011)
• Bookstore: A Visual Guide to Stata Graphics, 3rd Edition (Added 14 December 2011)
• Electronic version of the Stata News—4th quarter now available (Updated 28 November 2011)
• Visit us at ASSA 2012: January 6–8 (Added 8 November 2011)
• Statistics FAQ: Number of observations for subpopulation estimation (Added 14 October 2011)
• Nordic and Baltic Stata Users Group meeting: Program announced (Updated 14 October 2011)
• Statistics FAQ: Fitting a linear regression with interval (inequality) constraints using nl (Added 11 October 2011)
• Electronic version of the Stata News—3rd quarter now available (Updated 29 September 2011)
• New public training courses (Added 08 September 2011)
• Visit us at APHA 2011: October 29–November 2 (Added 07 September 2011)
• Data management FAQ: Reading a Stata dataset with an older version of Stata (Updated 01 September 2011)
• Stata 12 manual errata (Updated 04 August 2011)
• Practical Multivariate Analysis, 5th Edition (Added 03 August 2011)
• Flexible Paremetric Survival Analysis Using Stata: Beyond the Cox Model began shipping August 1 (Added 01 August 2011)
• Resources FAQ: The Statalist FAQ (Updated 29 July 2011)
• Resources FAQ: History of Stata (Updated 28 July 2011)
• Web FAQ: Common error messages you receive when trying to connect to the Internet from within Stata (Updated 27 July 2011)
• Programming language FAQ: Personal ado directory (Updated 27 July 2011)
• Programming FAQ: I have a certain version of Stata and have come across a user-written program that is apparently written for a later version of Stata. What are my options? (Updated 27 July 2011)
• Programming FAQ: What is the difference between a release marker and a version number in an ado-file? (Updated 27 July 2011)
• Programming FAQ: How can I automatically execute certain commands every time I start Stata? (Updated 27 July 2011)
• Programming FAQ: How can I pass arguments to my do-files? (Updated 27 July 2011)
• Programming FAQ: Where is the official ado directory? (Updated 27 July 2011)
• Graphics FAQ: Why do I see small line stripes in my filled contour plot? (Added 26 July 2011)
• Data management FAQ: Dealing with very large datasets (Updated 26 July 2011)
• Data management FAQ: Reading a Stata dataset with an older version of Stata (Updated 26 July 2011)
• Statistics FAQ: The divisor choice in xtgee (Updated 26 July 2011)
• Statistics FAQ: Repeated-measures ANOVA examples (Updated 26 July 2011)
• Statistics FAQ: Tests comparing levels of a categorical variable after anova or regress (Updated 26 July 2011)
• Statistics FAQ: Comparing xtgls with regress, vce(cluster) (Updated 26 July 2011)
• Statistics FAQ: Interpreting the intercept in the fixed-effects model (Updated 26 July 2011)
• Statistics FAQ: What are some of the problems with stepwise regression? (Updated 26 July 2011)
• Statistics FAQ: The Rasch model in Stata (Updated 26 July 2011)
• Statistics FAQ: Relation between official mi and user-written ice and mim commands (Updated 26 July 2011)
• Statistics FAQ: Accounting for clustering with mi impute (Updated 26 July 2011)
• Statistics FAQ: Combining results other than coefficients in e(b) with multiply imputed data (Updated 26 July 2011)
• Statistics FAQ: Obtaining elasticities for independent variables (Updated 26 July 2011)
• Statistics FAQ: Maximum likelihood estimation (Updated 26 July 2011)
• Statistics FAQ: Interpreting standard errors produced by Stata’s xtgee and SAS’s proc GENMOD (Updated 26 July 2011)
• Statistics FAQ: Negative and missing R-squared for 2SLS/IV (Updated 26 July 2011)
• Statistics FAQ: Single degree-of-freedom tests after ANOVA using nonresidual error (Updated 26 July 2011)
• Statistics FAQ: Mills’ ratios and censoring direction in the Heckman selection model (Updated 26 July 2011)
• Statistics FAQ: User-written packages for meta-analysis in Stata (Updated 26 July 2011)
• Statistics FAQ: Determining the sample for a Heckman model (Updated 26 July 2011)
• Statistics FAQ: Interpreting coefficients when interactions are in your model (Updated 26 July 2011)
• Statistics FAQ: The anova command and collinearity (Updated 26 July 2011)
• Statistics FAQ: One-sided tests for coefficients (Updated 26 July 2011)
• Statistics FAQ: Probability weights, analytic weights, and summary statistics (Updated 26 July 2011)
• Statistics FAQ: The appropriate command for matched case–control data (Updated 26 July 2011)
• Statistics FAQ: Define constraints for parameters (Updated 26 July 2011)
• Statistics FAQ: Specifying the time variable in xtgls (Updated 26 July 2011)
• Statistics FAQ: Estimation commands and omitted variables (Updated 26 July 2011)
• Statistics FAQ: Time-series operators (Updated 26 July 2011)
• Statistics FAQ: xtreg with the mle option versus xtreg with the re option (Updated 26 July 2011)
• Statistics FAQ: Using nlcom with long expressions (Updated 26 July 2011)
• Statistics FAQ: stsetting spell-type data (Updated 26 July 2011)
• Statistics FAQ: Failure time, censoring time, and entry time in the Cox model (Updated 26 July 2011)
• Statistics FAQ: Fitting a regression with interval constraints (Updated 26 July 2011)
• Statistics FAQ: Bootstrapping vectors (Updated 26 July 2011)
• Statistics FAQ: Estimating correlations with survey data (Updated 26 July 2011)
• Statistics FAQ: Negative eigenvalues with pf and ipf options of factor (Updated 26 July 2011)
• Statistics FAQ: Chow tests (Updated 26 July 2011)
• Statistics FAQ: Comparing p-values between a paired t-test and a signrank (Updated 26 July 2011)
• Statistics FAQ: Computing the Chow statistic (Updated 26 July 2011)
• Statistics FAQ: Using svyset for stratified multiple-stage designs (Updated 26 July 2011)
• Statistics FAQ: Instrumental variables for triangular/recursive systems with correlated disturbances (Updated 26 July 2011)
• Statistics FAQ: Two-stage least-squares regression (Updated 26 July 2011)
• Statistics FAQ: Interpreting the within and between variances in xtsum (Updated 28 June 2007)
• Statistics FAQ: Generating variables relating panel data to a reference panel (Updated 28 June 2007)
• Statistics FAQ: Bootstrap with panel data (Updated 26 July 2011)
• Statistics FAQ: Within group collinearity in conditional logistic regression (Updated 26 July 2011)
• Statistics FAQ: Use of ml for nonlinear model (Updated 26 July 2011)
• Data management FAQ: Creating dummy variables (Updated 26 July 2011)
• Data management FAQ: Converting other format files into Stata dataset files (Updated 26 July 2011)
• Resources FAQ: Learning about Stata (Updated 26 July 2011)
• Mac FAQ: Overview (Updated 25 July 2011)
• Mac FAQ: Is Stata compatible with Mac OS X 10.5 (Leopard), Mac OS X 10.6 (Snow Leopard), and Mac OS X 10.7 (Lion)? (Updated 25 July 2011)
• Mac FAQ: Copying graphs and tables on Mac (Updated 25 July 2011)
• Mac FAQ: Starting Stata remotely (Updated 25 July 2011)
• Mac FAQ: Executing Stata in background (batch) mode (Updated 25 July 2011)
• Mac FAQ: Starting Stata from a shell (Updated 25 July 2011)
• Mac FAQ: Will Stata 9 for Mac run on Intel Macs? (Updated 25 July 2011)
• Unix FAQ: Overview (Updated 25 July 2011)
• Unix FAQ: Running xstata while connected to a Unix machine from a Windows or Mac computer (Updated 25 July 2011)
• Windows FAQ: Overview (Updated 25 July 2011)
• Windows FAQ: Installing Stata for Windows on a network drive (Updated 25 July 2011)
• Windows FAQ: Installing Stata from the Windows command line (Updated 25 July 2011)
• Windows FAQ: Stata running slowly (Updated 25 July 2011)
• Windows FAQ: Running Stata for Windows in batch mode (Updated 25 July 2011)
• Windows FAQ: Kind of machine to run Stata (Updated 25 July 2011)
• Windows FAQ: Hardware requirements to run Stata (Updated 25 July 2011)
• Data management FAQ: Overview (Updated 25 July 2011)
• Data management FAQ: Dealing with multiple responses (Updated 25 July 2011)
• Data management FAQ: Selecting a subset of observations with a complicated criterion (Updated 25 July 2011)
• Data management FAQ: Reading a hierarchal dataset with infile (Updated 25 July 2011)
• Data management FAQ: Efficiently defining group characteristics to create subsets (Updated 25 July 2011)
• Data management FAQ: Generating the last date (Updated 25 July 2011)
• Data management FAQ: Sampling clusters, not individuals (Updated 25 July 2011)
• Data Management: Shortcuts to refer multiple variables (18 March 1997)
• Resources FAQ: Citing Stata software, documentation, and FAQs (Updated 25 July 2011)
• New job opportunity: Technical Editor (Added 14 July 2011)
• Stata 12 ships July 25 (Added 26 June 2011)
• Italian Stata Users Group meeting: Call for presentations (Added 26 June 2011)
• Stata at JSM 2011 in Miami Beach, FL (Added 14 June 2011)
• Australia and New Zealand Stata Users Group meeting: Call for presentations (Added 23 May 2011)
• Bookstore: Negative Binomial Regression, 2nd Edition (Added 28 April 2011)
• Mexican Stata Users Group meeting: Program announced (Updated 26 April 2011)
• Stata Conference Chicago 2011: Program announced (Updated 21 April 2011)
• Resource FAQ: Citing Stata software, documentation, and FAQs (Updated 20 April 2011)
• German Stata Users Group meeting: Program announced (Updated 19 April 2011)
• Spanish Stata Users Group meeting: Call for presentations (Added 14 April 2011)
• Web FAQ: Error message due to an incomplete update (Added 04 April 2011)
• Statistics FAQ: Fixed-, between-, and random-effects and xtreg (Updated 01 April 2011)
• Nordic and Baltic Stata Users Group meeting: Call for presentations (Added 21 March 2011)
• Order individual Stata Journals (Updated 17 March 2011)
• Giftshop: Stata fleece jacket in storm blue from Land’s End (Added 24 February 2011)
• Bookstore: Cluster Analysis, 5th Edition (Added 23 February 2011)
• Bookstore: Econometric Analysis, 7th Edition (Added 10 February 2011)
• Summer School on Modern Methods in Biostatistics and Epidemiology, June 5–18, 2011 (Added 10 February 2011)
• Practical use of multiple imputation to handle missing data course, April 14–15, 2011 (Added 10 February 2011)
• Bookstore: Principles of Econometrics, 4th Edition (Added 09 February 2011)
• German Stata Users Group meeting: Call for presentations (Added 09 February 2011)
• Tshwane University of Technology: The use of Stata 11 for data analysis, February 21–25, 2011 (Added 09 February 2011)
• UK Stata Users Group meeting: Call for presentations (Added 08 February 2011)