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From |
emanuele mazzini <madsoenistata@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Unique dyads |

Date |
Fri, 15 Apr 2011 11:21:49 +0200 |

That works!!!! Thank you very much! Regards, Emanuele. 2011/4/15 Nick Cox <njcoxstata@gmail.com>: > With numeric identifiers, id1 id2, or string identifiers id1 id2, > > gen first = cond(id1 < id2, id1, id2) > gen second = cond(id1 > id2, id1, id2) > egen group = group(first second) > > See my note as cited earlier. But I've not worked my way through the > FAQ to see if and why their method differs. > > Nick > > On Fri, Apr 15, 2011 at 12:18 AM, emanuele mazzini > <madsoenistata@gmail.com> wrote: >> Thanks for your reply. Well, not really. I mean, they are actually are >> the same thing, so I'm looking for a way to give "partnerA and >> partnerB" and "partnerB and partnerA" the same value of the variable >> dyad, since the one I mentioned before is not working. But I do need >> to take into account both the pairs and cannot exclude one of them as >> mine is an unbalanced panel, and I don't know if, for instance, the >> couple "partnerA and partnerB" is also listed as "partnerB and >> partnerA". >> >> Hope this can help for any further suggestion, >> >> Regards, >> >> Emanuele. >> >> 2011/4/14 Nick Cox <njcoxstata@gmail.com>: >>> I wrote something on this >>> >>> SJ-8-4 dm0043 . Tip 71: The problem of split identity, or how to group dyads >>> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. J. Cox >>> Q4/08 SJ 8(4):588--591 (no commands) >>> tip on how to handle dyadic identifiers >>> >>> Whether the UCLA FAQ came first I don't know. I wasn't aware of it >>> when I wrote. >>> >>> That aside, I don't follow your detail but guess that there is just >>> one key point: if "partner A - partner B" is not equivalent to >>> "partner B - partner A", as for example if the first partner is >>> exporter and the second importer, then >>> >>> egen id = group(partnerA partner B) >>> >>> should suffice for unique identifiers. >>> >>> Nick >>> >>> On Thu, Apr 14, 2011 at 7:29 PM, emanuele mazzini >>> <madsoenistata@gmail.com> wrote: >>> >>>> I am using an unbalanced dyadic panel dataset for which I need to >>>> generate an unique dyad id. I looked at this help: >>>> http://www.ats.ucla.edu/stat/stata/faq/dyad_ids.htm but the >>>> suggestions I found here do not seem to work in my dataset. In >>>> particular, the example shows that there is a certain symmetry, so >>>> that the couple for which a=1 and b=5 is the same couple for which a=5 >>>> and b=1. Hence the couple considered gets the same value for the >>>> variable dyad. But this does not work in my dataset because the couple >>>> that gets a given value for the variables a and b is not the same >>>> couple that gets the same values for b and a. >>>> I can be more clear with the following example, which will be in terms >>>> of countries, as in my dataset. Suppose I consider the couple USA and >>>> GBR and I apply the suggested procedure. Then when the couple is: >>>> USA-GBR i got a=1 and b=75 >>>> >>>> but when I consider the reverted couple, i.e GBR-USA, i got a=46 and >>>> b=90, which are absolutely not the same values, as the help i read >>>> suggest. >>>> >>>> Anyone can please help me to understand why this is happening or has >>>> an alternative way to proceed to get an unique dyad-id identifier? >>> * > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/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/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: Unique dyads***From:*emanuele mazzini <madsoenistata@gmail.com>

**Re: st: Unique dyads***From:*Nick Cox <njcoxstata@gmail.com>

**Re: st: Unique dyads***From:*emanuele mazzini <madsoenistata@gmail.com>

**Re: st: Unique dyads***From:*Nick Cox <njcoxstata@gmail.com>

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