Hi,

I'm doing a panel data estimation.
I'm merging (m:m) CSV files.
Till now the total number of observations is nearly15k.

But as I merge the last file total number of observations reach nearly 19k.

I want to drop unmatched observations.
.
I want to keep observations that match with the 'Master file'.
From the 'Using file' I don't want any unmatched observations.

Because that unnecessarily expand the total number of observations.
Plus, it's creating many missing observations for each variable.

Can you please help?

Best,