reference in Stata (How can I change reference group in stata?)

[Omer Faruk]

In fact, I changed reference group with "fvset base last
fvset base first". Unfortunately the result is same. What can I do?

[daniel klein]

What can I do?

Provide a reproducible example, including what you typed (exactly) and what Stata did in response (exactly), using code delimiters.

Best
Daniel

[Omer Faruk]

I understand you. I'm sorry. I can't do it.

[Alan Neustadtl]

Omar,

From the help file (help fvset) you can see the syntax of this Stata command:

 fvset base base_spec varlist

Note that a variable or variable list is required, not optional. From your post, it appears you did not supply a variable list.

Best,
Alan

[Omer Faruk]

Thanks

But I did it..

[Omer Faruk]

Help!

[Richard Williams]

Omer, it would help if you showed your code and output using code tags. See pt. 12 of the FAQ. Anyway, it looks to me like you are treating your independent variables as continuous rather than as categorical. See -help fvvarlist-. In other words, instead of something like

reg y x1 x2

you need

reg y i.x1 i.x2

If that isn't solving your problem please show complete code and output.