Dear Stata users,
my dataset is in panel format.
My variables are date, stock_id, adjtprcprev and cover period from 1990 to 2015. I need to drop stock_id from a sample at all if adjtprcprev took value below 1 in some stock_id/date.
Here is a sample of my data:
Any help is much appreciated.
Thank you.
my dataset is in panel format.
My variables are date, stock_id, adjtprcprev and cover period from 1990 to 2015. I need to drop stock_id from a sample at all if adjtprcprev took value below 1 in some stock_id/date.
Here is a sample of my data:
Code:
* Example generated by -dataex-. To install: ssc install dataex clear input float date long Stock_id float adjtprcprev 19661 90069 .6 19662 90069 .6 19663 90069 .6 19666 90069 .6 19667 90069 .5699 19668 90069 .56 19768 90069 1.2 19772 90069 1.31 19773 90069 1.18 19774 90069 1.24 19775 90069 1.18 19778 90069 1.18 19779 90069 1.19 19785 90069 1.5 20264 90069 .532 20265 90069 .52 20268 90069 .5253 20269 90069 .49 16155 90071 10.655 16156 90071 10.66 16159 90071 10.925 16160 90071 10.995 16161 90071 11.1 end format %tdNN/DD/CCYY date
Thank you.