EViews.com

I have 4 variables in the regression starting from 1960 -2010. The other 3 variables have data for every year, however, for secondary school enrollment it begins in 1990. When i run the regression it disregards all the variables from before 1990, so the regression only has 20 observations (1990 - 20...

I am attempting to run an OLS regression for Estonia, however I am missing some data for my variable seconday school enrollment. When i run the regression it is ignoring the missing data (NA) and taking observations from the year in which I have secondary school enrollment data. Is there a way round...