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From |
Jeph Herrin <junk@spandrel.net> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: take the age of one observation and attach it to its matching observation by id with events accruing over time intervals |

Date |
Fri, 16 Oct 2009 15:36:48 -0400 |

try using a merge: preserve keep year spouse_id age ren spouse_id id ren age spouse_age sort year id save temp, replace restore sort year id merge 1:1 year id using temp drop if _merge==2 hth, Jeph Eric Fail wrote:

Dear all After hours of reading and fiddling around I allow myself to write on the Statalist in the hope that someone out there will take the time to help me. What I want to do seem quite simple but I just can’t figure it out. I simply want to take the age of one spouse and attach it to its matching spouse by id, so I get a spouse_age at each observation. I have read this thread http://www.stata.com/statalist/archive/2002-07/msg00124.html where the case is family’s, but as I don’t have continues id’s that tips doesn’t seem to work in my case. Furthermore I have read Nicholas J. Cox’ Stata tip 51: Events in intervals. But I must admit that I couldn’t figure it out from that description either. So now I try my luck here at the Statalist. I have a dataset like the one below, except the ‘goal_spouse_age’, that’s the variable I want to create. clear input str17 date year id spouse_id age goal_spouse_age "01/01/2000" 2000 1 4 40 19 "01/01/2001" 2001 1 4 41 20 "01/01/2002" 2002 1 5 42 40 "01/01/2000" 2000 2 6 24 24 "01/01/2001" 2001 2 7 25 40 "01/01/2000" 2000 3 8 20 16 "01/01/2001" 2001 3 8 21 17 "01/01/2002" 2002 3 11 22 44 "01/01/2003" 2003 3 4 23 22 "01/01/2000" 2000 4 1 19 40 "01/01/2001" 2001 4 1 20 41 "01/01/2002" 2002 5 1 40 42 "01/01/2000" 2000 6 2 24 24 "01/01/2001" 2001 7 2 40 25 "01/01/2000" 2000 8 3 16 20 "01/01/2001" 2001 8 3 17 21 "01/01/2002" 2002 11 3 44 22 "01/01/2003" 2003 4 3 22 23 End Can anyone tell me what to do or what I should read to figure this out? I have managed to count the numbers of spouse each observation has, by using the loop below, thanks to Nicholas J. Cox’ description the thread mention above. local N = _N forvalues i = 1/`N' { egen tag = tag(spouse_id) /// if id == id[`i'] count if tag replace count = r(N) in `i' drop tag } The next thing I need to do is to measure the length of the first two or three marriages the observations have had. I mention this even I haven’t work very much on this part in the hope that one of you guys out there have had s similar case or can direct me to somewhere where I can read more about the specific case with events accruing over a time span. Thanks in advance. Eric Fail * * 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/

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