do we have simpler syntax to realize this goal?

[Fred Lee]

if lnEmployee1Y ~=. & lnCash1Y~=. & lnTtlAsset1Y~=. & stdRevenue1Y~=. & stdNetProfit1Y~=. & lnRDExp1Y~=.

Thanks so much!

[Clyde Schechter]

if !missing(lnEmployee1Y, lnCash1Y, lnTtlAsset1Y, stdRevenue1Y, stdNetProfit1Y, lnRDExp1Y)

will work provided your data set does not use any missing values other than the system missing (.). If you do have other missing values in the data, and you do not want to proceed if one of those values is taken on by one of the variables, then the following code is more specific to just system missing:

if !inlist(., lnEmployee1Y, lnCash1Y, lnTtlAsset1Y, stdRevenue1Y, stdNetProfit1Y, lnRDExp1Y)

[Fred Lee]

if !missing(lnEmployee1Y, lnCash1Y, lnTtlAsset1Y, stdRevenue1Y, stdNetProfit1Y, lnRDExp1Y)

will work provided your data set does not use any missing values other than the system missing (.). If you do have other missing values in the data, and you do not want to proceed if one of those values is taken on by one of the variables, then the following code is more specific to just system missing:

if !inlist(., lnEmployee1Y, lnCash1Y, lnTtlAsset1Y, stdRevenue1Y, stdNetProfit1Y, lnRDExp1Y)

This is exactly what I want! Thanks so much!

[Richard Williams]

I also like

reg y x1 x2 x3 x4
gen mysample = e(sample)

Subsequent commands that want to restrict the sample can just add if mysample

It is especially handy if you are going to further restrict the sample, e.g. only analyze women.

I mostly like the simplicity of the command. The other proposed solutions work but are more complicated and, I suspect, more prone to syntax mistakes. The reg command itself doesn't have to be something you are interested in, it just has to have all the variables you want.

[Fred Lee]

I also like

reg y x1 x2 x3 x4
gen mysample = e(sample)

Subsequent commands that want to restrict the sample can just add if mysample

It is especially handy if you are going to further restrict the sample, e.g. only analyze women.

I mostly like the simplicity of the command. The other proposed solutions work but are more complicated and, I suspect, more prone to syntax mistakes. The reg command itself doesn't have to be something you are interested in, it just has to have all the variables you want.

Thank you so much! This is another smart way!