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From |
Ekaterina Hertog <ekaterina.hertog@sociology.ox.ac.uk> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: AW: st: RE: AW: how to reconstruct a minimum acceptable income from a set of binary variables? |

Date |
Mon, 02 Mar 2009 17:07:11 +0000 |

Dear Martin, Thank you again for the advice!

replace mindesinc=7000 if desired_income_above_7000==1 Would it work if I write: replace mindesinc=7000 if desired_income_above_7000 Or did you mean I should omit the "==1" bit when writing to the list? Sorry for a silly question, sincerely yours, Ekaterina Martin Weiss wrote:

<>On your method, I would say this is the best way for a beginner to think about such a problem and see how logically values get replaced based on some condition. You can omit the "==1" part, btw. On the last question, M. Buis gave a speech in Chicago which touched upon this subject. See http://www.stata.com/meeting/snasug08/buis_MLBsimulate.zip and exectute -view mlbsnasug08.smcl- to start the presentation... HTH Martin -----Ursprüngliche Nachricht----- Von: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Ekaterina Hertog Gesendet: Montag, 2. März 2009 17:50 An: statalist@hsphsun2.harvard.edu Betreff: Re: st: RE: AW: how to reconstruct a minimum acceptable income from a set of binary variables? Dear all, Thank you very much for all the comments.The real structure of my data is as I stated originally, rather than asMartin described it:e.g. input id mindesinc_500_999 mindesinc_1000_1499 mindesinc_1500_1999 101 1 1 1 1 102 0 1 1 1 103 0 0 1 1 104 0 0 1 1 105 0 1 1 1Basically once the person finds a certain income acceptable he or shefinds every income above acceptable too and puts 1s, rather than 0s.At the moment I used one of the earlier advices I got with a bit of amodificationgen mindesinc=0 replace mindesinc=7000 if desired_income_above_7000==1 replace mindesinc=6000 if desired_income_6000_6999==1 replace mindesinc=5000 if desired_income_5000_5999==1 replace mindesinc=4500 if desired_income_4500_4999==1 replace mindesinc=4000 if desired_income_4000_4499==1 replace mindesinc=3500 if desired_income_3500_3999==1 replace mindesinc=3000 if desired_income_3000_3499==1 replace mindesinc=2500 if desired_income_2500_2999==1 replace mindesinc=2000 if desired_income_2000_2499==1 replace mindesinc=1500 if desired_income_1500_1999==1 replace mindesinc=1000 if desired_income_1000_1499==1 replace mindesinc=0 if desired_income_0_999==1 | no_desired_income==1I know it is not very elegant, but I thought this would pick up thelowest acceptable income.I was wondering if anyone would have any thoughts on a related questionwhich is not specifically on Stata.Apart from variable on minimum desired income my dataset (it is adataset from a marriage agency) contains a host of variables on desiredheight, weight, marital status etc.In particular I am now thinking about the variables of minimum desiredheight. They are different from the income variables in that for manypeople they describe a desired minimum and a maximum. So the data lookssomething like that:input id mindesheigh_below_150 mindesheigh_150_154mindesheight_155_159 mindesheight_160_164mindesheight_165_169 ... mindesheight_above_180101 1 1 1 1 0 102 0 1 1 1 0 103 0 0 1 0 0 104 0 0 1 1 0 105 0 1 1 1 1I am restructuring these variables into two: minimum desired height andmaximum desired height. I am not sure how to treat the minimum desiredheight below 150 in the variable for minimum desired height and maximumdesired height of above 180 in the variable for maximum desired heightsince I cannot really input metric values into them. There are fewpeople who have such preferences so if I cannot find a good way ofdealing with those I could consider simply dropping the observations inquestion, but I was wondering if anyone has a good idea or knows of apaper which came up with a good solution to such an issue?I would be very grateful for advice, sincerely yours, Ekaterina Jeph Herrin wrote:Well, on inspection, I see that her data have multiple tags per record, so that 1s are filled to the right after the first (left to right) 1; I was misled by Martin's faux dataset. Her stated logic would then require: gen min=mininc1*500+(mininc2-mininc1)*1000+(mininc3-mininc2)*1500 Pending clarificaiton from Ekaterina about the _real_ structure of her data.. Jeph Nick Cox wrote:Good! I didn't spell out that I feared that there are yet other variables in what might be Ekaterina's _real_ problem, lurking behind her stated problem, making a more general approach attractive too. Nick n.j.cox@durham.ac.uk Jeph Herrin Briefer yet: gen min=mininc1*500+mininc2*1000+mininc3*1500 which also traps the missings Nick cautions about. Nick Cox wrote:A variation on the same idea:gen min = 500foreach v in 1000 1500 2000 { replace min = `v' if mindesinc_`v'== 1 }To be careful, check egen row = rowtotal(mindesinc*) assert row == 1 Nick n.j.cox@durham.ac.uk Martin Weiss *reconstruct Ekaterina`s data clear* input id mindesinc_500_999 mindesinc_1000_1499 mindesinc_1500_1999 101 1 0 0 0 102 0 1 0 0 103 0 0 1 0 104 0 0 1 0 105 0 1 0 0 end *construct the minimum desired income g mindesinc=500 if mindesinc_500_999 replace mindesinc=1000 if mindesinc_1000_1499 replace mindesinc=1500 if mindesinc_1500_1999 l Ekaterina Hertog I am dealing with a dataset from a private company and so my dataoftencomes in rather strange format and I now came against the following problem:I have a set of individuals who answered questions about desiredincome.It looks as follows: Individ nmb | Min desired income 500 - 999 | 1000 - 1499 | 1500 -2000|101 | 0| 0 | 1 |102 | 0| 1 | 1 |103 | 0| 0 | 1 |104 | 1| 1 | 1 |105 | 0| 1 | 1 |Is there a way to automatically recode these binary minimum desiredincome variables into a numerical variable which would state theminimumacceptable figure for each individual?That is some routine which would check "Min desired income 500 -999" and if it equals 1 then would input 500 for the individual inquestioninto a newly constructed variable "Minimum acceptable income" and moveon to the next person and if it equals 0 would look at the value of"1000 - 1499" variable and if it equals 1 would input 1000 for thatperson and move on to the next person and if it is 0 would look at"1500- 2000" variable?* * 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/

-- Ekaterina Hertog (née Korobtseva) Career Development Fellow Department of Sociology and Nissan Institute of Japanese Studies University of Oxford 27 Winchester Road Oxford OX2 6NA United Kingdom * * 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**:**RE: AW: st: RE: AW: how to reconstruct a minimum acceptable income from a set of binary variables?***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

**AW: AW: st: RE: AW: how to reconstruct a minimum acceptable income from a set of binary variables?***From:*"Martin Weiss" <martin.weiss1@gmx.de>

**References**:**st: how to reconstruct a minimum acceptable income from a set of binary variables?***From:*Ekaterina Hertog <ekaterina.hertog@sociology.ox.ac.uk>

**st: AW: how to reconstruct a minimum acceptable income from a set of binary variables?***From:*"Martin Weiss" <martin.weiss1@gmx.de>

**st: RE: AW: how to reconstruct a minimum acceptable income from a set of binary variables?***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

**Re: st: RE: AW: how to reconstruct a minimum acceptable income from a set of binary variables?***From:*Jeph Herrin <junk@spandrel.net>

**RE: st: RE: AW: how to reconstruct a minimum acceptable income from a set of binary variables?***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

**Re: st: RE: AW: how to reconstruct a minimum acceptable income from a set of binary variables?***From:*Jeph Herrin <junk@spandrel.net>

**Re: st: RE: AW: how to reconstruct a minimum acceptable income from a set of binary variables?***From:*Ekaterina Hertog <ekaterina.hertog@sociology.ox.ac.uk>

**AW: st: RE: AW: how to reconstruct a minimum acceptable income from a set of binary variables?***From:*"Martin Weiss" <martin.weiss1@gmx.de>

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