Survey Design and Analysis Services Pty Ltd

17/09/2026

Add 95% confidence intervals by category in Stata. This example uses `statsby`, `ci means`, `twoway rcap`, and a scatter plot for mean wages by grade.

https://techtips.surveydesign.com.au/post/add-confidence-intervals-by-category

16/09/2026

New in – Mundlak specification test.

The new postestimation command in Stata can be used to determine whether a fixed-effects or correlated random-effects model would be more appropriate than a random-effects model.

www.youtube.com/watch?v=86Osyx-9ZLQ

15/09/2026

Today's SDAS highlights how to keep variables or observations from a dataset using the keep command.

View all our TechToks at www.youtube.com/

13/09/2026

Want to learn to program in Stata?

NetCourse 151: Introduction to Stata Programming covers branching, looping, flow control and accessing estimation results using Stata's programming language. Next course starts 9 October.

Enrol at www.surveydesign.com.au/stata/netcourse.html?ncId=151

12/09/2026

📝 Not sure where to start with the Certified Stata Analyst Program?

Take our less-than-a-minute quiz to find the right starting point for your Stata skills and experience at sdas.com.au/certified.

11/09/2026

The 2026 Australian Public Health Conference is next week on 15-17 September in Geelong. It showcases data analysis in action in a health field and SDAS will be attending so come say hi!

Learn more at www.austph2026.com.

Our 2026 Australian Public Health Conference theme is: 'Transforming healthier futures: systems, solutions and solidarity'. Join us in Geelong in September!

09/09/2026

Graph Editor edits can become reproducible Stata commands. This guide uses `gr_edit` text boxes to add a small mean mpg table to a scatter plot.

https://techtips.surveydesign.com.au/post/add-a-table-to-your-graph-with-the-graph-editor

09/09/2026

New in – Instrument variables local projection impulse-response functions.

The new command in Stata allows you to account for endogeneity when using local projections to estimate dynamic causal effects.

www.youtube.com/watch?v=-I7LkShXL8Q

08/09/2026

Today's SDAS illustrates how to create a one-way table using the table command, which shows the frequency of each possible value of a variable.

View all our TechToks at www.youtube.com/

07/09/2026

Join SDAS this Wednesday 9 Sept at 3:00pm AEST for our free webinar Creating and Using Logs in Stata. Learn how to create and use logs to have a record of your work in Stata.

Register today at https://surveydesign.com.au/webinars.