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]

From |
Austin Nichols <[email protected]> |

To |
"[email protected]" <[email protected]> |

Subject |
Re: st: calculating transitions in survey data (SVY) |

Date |
Thu, 30 Jan 2014 07:13:31 -0500 |

Marilena <[email protected]>: Ah--those are usually called "waves" or "rounds" of a longitudinal survey. The uneven spacing complicates your interpretation of transition rates. If you are willing to assume the transition matrix satisfies the Markov properties, you can take a root of the matrix to get a set of estimated monthly rates, i.e. assume the matrix M_27 measuring where people are after 27 months is m^27 where m is the matrix of month-to-month transitions. And M_24 measuring where people are 24 months later is m^24 which means the comparison of [9 months to 3 years] to [3 years to 5 years] is m^27/m^24, or more generally perhaps you want to estimate a monthly probability of each transition adjusting for time at risk if ages differ across individuals in the survey. On Thu, Jan 30, 2014 at 6:58 AM, Komodromou, Maria E <[email protected]> wrote: > Thanks. > > Sorry i should have explained. I have a birth cohort survey and sweep means each time the survey is repeated ie in 9 months 3 years 5 years after the birth of the child. I am interested to see transitions in and out of employment of parents when the child is 9 months (sweep 1) 3 years (sweep2) 5 years (sweep3). > > Hope this clarifies it. > > Sent from my iPhone > > On 30 Jan 2014, at 11:44, "Austin Nichols" <[email protected]> wrote: > >> Marilena <[email protected]>: >> >> I don't know what you mean by sweep. In labor economics, "sweep" >> usually refers to the range of wage levels affected by a policy e.g. a >> minimum wage. But to measure transition rates in employment, tab >> employment versus lagged employment. In that tab, you probably want >> column proportions; if you tab lagged employment versus employment, >> you probably want row proportions (to see the fraction of people >> transitioning from employed to unemployed, for example). Note that >> this works for multistate variables as well, e.g. if you have many >> labor force status categories in your employment variable. >> >> On Thu, Jan 30, 2014 at 5:57 AM, Komodromou, Maria E <[email protected]> wrote: >>> Hi Austin >>> >>> Thank you so much. Just to see if I understand correctly I basically generate a lag for each sweep and I include it with my variables in svy:tab? >>> >>> Best, >>> >>> Marilena >>> >>> On 29 Jan 2014, at 21:59, "Austin Nichols" <[email protected]> wrote: >>> >>>> see >>>> >>>> http://www.stata.com/statalist/archive/2011-04/msg01110.html >>>> >>>> On Wed, Jan 29, 2014 at 3:36 PM, Komodromou, Maria E <[email protected]> wrote: >>>>> Hi, >>>>> >>>>> I am using the millennium cohort survey which given its design i use the survey (svy) commands. i would like to calculate some transitions between sweeps (i.e in/out of employment, changes in marital status etc). Does anyone know a command that I can utilise with svy? >>>>> >>>>> Thanks, >>>>> >>>>> Marilena >> * * 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/

- Prev by Date:
**RE: st: problems with levpet command** - Next by Date:
**Re: st: RE: what is wrong with my nl function in stata?** - Previous by thread:
**Re: st: calculating transitions in survey data (SVY)** - Next by thread:
**st: Strata, PSU, and Bootstrap Issues with svyset** - Index(es):