Note that Stata’s mi commands were implemented in version 11, the code below is not applicable to earlier versions. One common storage method for multiply imputed (MI) datasets is to…
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Here is a traditional regression model with an interaction: regress y x1 x2 x1#x2 We see two main effects (x1 & x2) in addition to the interaction term (x1#x2). Is…
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Stata FAQ: How can I test for nonadditivity in a randomized block ANOVA in Stata? Randomized block ANOVA models assume additive block and treatment effects, that is, that there is…
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Sometimes, a data set may have “holes” in it, that is, missing values. Some statistical procedures such as regression analysis will not work as well, or at all, on a…
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Note: This page is written using Stata 11 and Windows XP.  Stata command odbc allows Stata to load, write, or view data from ODBC sources. ODBC, an acronym for Open…
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Interpreting interactions in ologit is similar interpreting interactions in logit with the complication of multiple equations. We will demonstrate a categorical by continuous interaction using the hsbdemo dataset. We will…
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The margins and marginsplot commands, introduced in Stata 11 and Stata 12, respectively, are very popular post-estimation commands. However, they can be tricky to use in conjunction with multiple imputation….
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After you perform an ANOVA, it is useful to be able to report Omega Squared as a measure of the strength of the effect of the independent variable.  Stata does…
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You may also want to check out, FAQ: How do I use odds ratio to interpret logistic regression?, on our General FAQ page. Introduction Let’s begin with probability. Probabilities range…
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Say that you want to output the data from Stata to a formatted ASCII file, that is, a file where variables are in specific columns and may be on different…
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