Dear Statalisters
I have a dataset like the following, where the SIC values are in an ascending order
SIC EXP
2011 667.8039
2013 130.8002
.
.
.
.
2095 38.90306
2098 0.617763
2111 249.92
2121 3.738577
2131 35.32281
.
.
.
2298 5.709858
2299 39.7519
.
.
etc
What I want to find is the sum of EXP values that have a SIC value begining with 20, i.e. 667.8039+130.8002+..+38.90306+0.617763
In others words I have some 4digit SIC data and I want to aggregate them into 2digit SIC.
Any hint is really appreciated
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
