Hi, Statalists,

I have got a question on adding star after coefficient in the matrix output of a regression. Below are the code and output.

Code:
set trace on
version 15.1
clear
sysuse auto.dta
local outcome price mpg headroom
local k = 1
foreach var of varlist `outcome' {
    qui reg `var ' i.foreign, robust
    mat b_`k' = r(table)
    mat b_`k' = (b_`k'[1, 2..3] \ b_`k'[4, 2..3])'
    local lbl_var: var label `var'
    mat colnames b_`k' = "`lbl_var'" "`lbl_var'_pvalue"
    local val_lbls
    local val_lbl: label(foreign) 1
    local val_lbls `" `val_lbls' "`val_lbl'" "'
    local val_lbls `" `val_lbls' "The Constant" "'
    macro list _val_lbls
    mat rownames b_`k' = `val_lbls'
    local k = `k' + 1
}
mat final = b_1
forvalues k = 2/3 {
    mat final = final, b_`k'
}
mat list final
Code:
final[2,6]
                     Price  Price_pvalue  Mileage(mpg)  Mileage (m~e  Headroom (~)  Headroom (~e
     Foreign     312.25874     .65768953     4.9458042      .0020303    -.54020979     .00150673
The Constant     6072.4231     2.258e-22     19.826923     1.881e-42     3.1538462     6.313e-37
There are three outcome variables, "price" "mpg" "headroom" and the independent variable is foreign which is a categorical variable. The first column of each outcome variable is the coefficient and the second column is the p-value.

Now, the question is that, since I manually add these values to this matrix, there is no star after each coefficient show if this is statistically significant. Ideally, I hope I could add stars to each coefficient. It will be like, if p-value is less than 0.01, then there will be three stars in the top right corner of that coefficient. I need to use a matrix here for later, so I cannot use outreg2 or esttab.

Does anyone happen to know how to achieve this?

Thanks a lot!