Some Stata users have found that there are values of e(r2) and e(r2_a) after running the rreg. You can see it in the example below using the crime dataset. We…
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There are many instances when you may want to take a random sample of your dataset.  For example, you may have a very large data set, and you are trying…
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Say that you use SAS but wish to know how to do a particular command in Stata. For example, you want to make a new variable and know you can…
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Stata does not allow you to save the output in the Results window through the menu system. Stata does however offer ways to capture the output and save it to…
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Stata makes it very easy to create a scatterplot and regression line using the graph twoway command. We will illustrate this using the hsb2 data file. use https://stats.idre.ucla.edu/stat/stata/notes/hsb2 Here we…
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In Stata, the Results window holds up to 32000 bytes of information (output), after that, older output at the top of the buffer is replaced by new output when it…
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When going through data management steps in Stata, there are several documentation features available that allow you to attach information to the dataset.  This approach to documenting allows you to…
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Below is the diagram of a simple structural equation model. The dependent variable is a latent variable Acad with three observed indicators, math, science and socst. There are two additional…
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Stata commands sem, introduced in Stata 12, and gsem, introduced in Stata 13 are very powerful and flexible. However, they differ on which options are allowed. The table below gives…
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The sem command introduced in Stata 12 makes the analysis of mediation models much easier as long as both the dependent variable and the mediator variable are continuous variables. We…
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