* Create local with all variable names used in the estimation (i.e.

Xi: reg OUTCOME i.GROUPVAR i.OTHERVAR, nocons noomit The egen function is used to create new variables. Combining egen mean with by processing in Stata makes this a breeze, even when cluster sizes differ. egen y (mean (INCOMEPC)-min (INCOMEPC))/ (max (INCOMEPC)-min (INCOMEPC)) At first egen was not working, but somehow I fixed that, but when I try to execute. The egen mean function makes creating means easy. Here is the command for creating the variable. I am absolutely new to stata and I am am having some trouble creating a variable. The syntax goes as following: * Run the regression (without constants) Executing command shows unknown egen function. generate newvar exp creates the new variable from existing variables through an expression. In my case, this means that we are saving the estimates. The five commands below are often used to create or modify variables.

It first saves all stored estimates from the matrix of estimation results (stored in e(b)), and then does something with the estimates with certain names (in my case: those starting with _IGROUPVAR). using the _rmcoll command), but the following worked well for me. Depending on fcn, arguments refers to an expression, varlist, or numlist, and. Generating and replacing variables egen egen means extension to generate Contains a variety of more sophisticated functions Type help egen in Stata to get a complete list of functions LetвЂ™s create a new variable that counts the number of yes responses on computer, email and internet use: // count number of yes on comp email. While it is easy to check whether variables or scalars exist (using capture confirm variable VARNAME or capture confirm scalar SCALARNAME), it seems more difficult to do for large number of estimates after a regression, especially if some of the dummies are omitted. by is allowed with some of the egen functions, as noted below. If you are now interested to store all estimates of all dummies generated by вЂњ i.GROUPVARвЂњ, we need to separate these variable names stored in the loop (starting with _IGROUPVAR_) from all other variable names stored in the loop. Stata reports i.GROUPVAR _IGROUPVAR_111-999 (naturally coded _IGROUPVAR_111 omitted) Occasionally, it happens that some of the coefficients are not estimated due to multicollinearity (be sure to figure out why!), i.e.

Where GROUPVAR is the original variable name for which the dummies where created in the regression (using xi:). While this is usually straightforward by writing xi: reg OUTCOME i.GROUPVAR i.OTHERVAR, nocons noomit In this example, we are interested in storing the estimates of the GROUPVAR dummies, but not the dummies of OTHERVAR. fixed effects), you might want to store coefficients as estimates. if you want to save coefficient estimates from a regression with many dummies (e.g.

Egen stata