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From |
"Nick Cox" <n.j.cox@durham.ac.uk> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: RE: Re: Generate Variable |

Date |
Thu, 12 Mar 2009 12:32:14 -0000 |

Another approach: I infer panel structure with an identifier, and at most one measurement for each -wavenum-. If that is so egen numProp4 = total((wavenum == 4) * numProp) , by(id) and egen numInsArrng6 = total((wavenum == 6) * numInsArrng) , by(id) spread values in particular wave numbers to all observations with the same identifier. For example, wavenum == 4 is 1 if wavenum is 4 and 0 otherwise, so the ensuing total is just the value of numProp for wavenum == 4. The required indicator variable follows directly. Note that even Erick's -if- condition had been correct (it isn't), his expression for indicator (dummy in his terminology) would have yielded 1 and missing, not 1 and 0. Nick n.j.cox@durham.ac.uk Martin Weiss More Income in 1982 than in 1980? Let`s see... ********* clear* inp id year sex inc 1 80 0 5000 1 81 0 5500 1 82 0 6000 1 83 0 7000 2 80 1 2000 2 81 1 2200 2 82 1 3300 2 83 1 3500 3 80 0 3000 3 81 0 2000 3 82 0 1000 3 83 0 1000 4 80 0 3000 4 81 0 4000 4 82 0 1000 4 83 0 10000 end *mark years to compare tempvar compare g byte `compare'=year==80 | year==82 *sort them to the end, within id and respecting years, and generate indicators bys id (`compare' year) : g byte hi82=inc[_N]>inc[_N-1] *resort sort id year drop `compare' *let`s see l, noo sepby(id) Erick Guerrero, M.A. (Ph.D. Candidate) > I am trying to create a dummy > variable that is equal to 1 when organizations have more > properties in wave 6 compared to wave 4. My data is in long > form. > > Logically, it would be something like this, but this does not > work, I am missing some steps. > > gen HiPropertyw6= 1 if (numProp==wavenum==4 < > numInsArrng==wavenum==6). * * 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/

**Follow-Ups**:**st: AW: RE: Re: Generate Variable***From:*"Martin Weiss" <martin.weiss1@gmx.de>

**References**:**st: Generate Variable***From:*<erickg@uchicago.edu>

**st: Re: Generate Variable***From:*"Martin Weiss" <martin.weiss1@gmx.de>

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