[PDF] creating dummy variables in stata

A dummy variable is a variable that takes on the values 1 and 0; 1 means something is true (such as age < 25, sex is male, or in the category “very much”).Autres questions
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  • How to create dummy variables in Stata command?

    We can create dummy variables using the tabulate command and the generate( ) option, as shown below.
    The tabulate command with the generate option created three dummy variables called dum1 , dum2 and dum3 .

  • How to create dummy variables in Stata command?

    One way to create a dummy variable is to use generate with an statement.
    The result would be 1 where the condition is true (repair record is more than or equal to 5) and 0 elsewhere.
    In hierarchical data, in combination with the by prefix , generate and egen can be used to create indicator variables on lower levels.

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25 Working with categorical data and factor variables

We (wisely) told Stata to generate the new variable agecat as a byte thus conserving memory. We can create the same result with one command using the recode() 



xi — Interaction expansion

by creating new variables and in the second syntax (xi: any stata command)



26 Working with categorical data and factor variables

We (wisely) told Stata to generate the new variable agecat as a byte thus conserving memory. We can create the same result with one command using the recode() 



Stata Tip 52: Generating Composite Categorical Variables

If you have two or more categorical variables you may want to create one composite categorical variable that can take on all the possible joint values.



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THE GENERATE COMMAND. CREATING DUMMY VARIABLES. REGRESSIONS. LINEAR REGRESSION. PROBIT MODELS. WRITING A PROGRAM: DO-FILES. RECORDING OUTPUT: LOG FILES.



Speaking Stata: How best to generate indicator or dummy variables

21 sept. 1983 The term “dummy variable” for a variable encoded with values of 0 and 1 seems to have arisen around 1950 in statistical science. Freedman (2009 ...



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14 sept. 2011 Stata's regress command runs a simple OLS regression ... To create dummy variables based on categories of another variable use the tabulate ...



Title Syntax Menu Description

xi [ prefix(string) noomit ] : any stata command varlist with terms . creates dummies for categorical variables varname1 and varname2:.



Panel Data Analysis Fixed and Random Effects using Stata

(interaction expansion) to automatically generate dummy variables. 21. NOTE: In Stata 11 you do not need. “xi:” when adding dummy variables.



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