Hi, I want to run a regression to compáre yield at issuance of green and non-green bonds. In order to do so, my approach is to do a matching based on variables such as the currency in wich the bond was issued, the country of the issuer, the year it was issued and so on. Some are continuos variables (e.g. size of the emission) and some are indicator variables (e.g. currency). I used the command psmatch2 to do the match, and I got a lot of messages like that:

2011.year != 0 predicts failure perfectly
2011.year dropped and 1128 obs not used
Also, some messages stating that variable were omitted because od collinearity.

Because of that, I imagine, the table resulting from the psmatch2 command has a lot of empty or omitted variables. I'm not quite sure if this is a problem and what I could do to solve it. Maybe someone has some advice about it?

PS: how can I export the results to a word document in a way that the table presents the standard stars based on the p-values? (I tried to use asdoc, but I didn't get the results I expected).

Thanks!