Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: Improve matching
From
Nick Cox <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: Improve matching
Date
Fri, 17 May 2013 16:41:53 +0100
gen namelength = length(trim(firm))
bysort id (namelength) = trim(firm[_N])
Then if all is well
by id : keep if _n == _N
I threw in trimming of leading and trailing spaces too.
(For "STATA" read "Stata".)
Nick
[email protected]
On 17 May 2013 16:20, Seliger Florian <[email protected]> wrote:
> Dear Statalist,
>
> I want to improve matching of two datasets. I use a matching software, but want to prepare the datasets with STATA.
> One dataset is in panel structure, i.e. I have multiple observations per ID:
>
> ID firm
> 314 POLYTYPE
> 314 POLYTYPE MASCHINENFABRIK
> 314 POLYTYPE NA
> 314 POLYTYPE
> 314 POLYTYPE
> 314 POLYTYPE
>
> The length of the firm name may vary across IDs.
> I noticed that it is necessary to keep only the ID with the LONGEST NAME, in this case "POLYTYPE MASCHINENFABRIK".
> It is necessary to delete all other IDs for the same observation to enable a proper matching (due to the software).
>
> Any suggestions how I could only keep the LONGEST NAME IDs (each observation has different names, and within each observation each ID has different names, there is no regularity) in STATA?
>
> Thank you for your consideration.
>
> Best,
> Florian
>
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/faqs/resources/statalist-faq/
> * http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/