Regression output does not show all coefficients

[Mat Sko]

Hi,

I have a quick question:

When I enter the following code for a regression with 1 independent variable, all yearquarter data (coeff, std.error etc) is shown in the output table:

reg loglprice i.yearquarter

But when I do the same for more independent variables, only the last 10 quarter dates or so are shown in the output table:

reg loglprice i.yearquarter loglot logunitsf floors rooms bedrms baths 1.garage 1.porch 1.poolacc 1.fplwk 1.airsys

The other variables (loglot to airsys) are shown as well, so it is only yearquarter that is limited.


Is there a reason why it does not show the output of all the yearquarters?

Thanks for the help.

[Marcos Almeida]

We need to check the output. That said, it might well be due to omitted variable on account of collinearity. If this is the case, Stata tells you.

[Dick Campbell]

You need to show us the entire output for someone to diagnose this. I'd guess values of yearquarter are being dropped due to complete collinearity but you don't give us enough information to tell.

[Mat Sko]

There was a problem with the variable poolacc, which contained empty values.
But thanks for your reply.