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Forum: Stata

Stata usage and programming, Stata help

  1. Cox regression time dependent effects

    I have developed a multivariable Cox model including variables associated with mortality using Stata 14.1. I identified a time dependent effect...

    Started by Maddy M‎, 02-23-2017 11:25 AM
    • Replies: 0
    • Views: 160
    02-23-2017, 11:25 AM Go to last post
  2. Dropping observations w.r.t. 2 different variables

    Well, to be honest I do not know how to express my problem so I have uploaded an image. http://imgur.com/JkmzVbV I need a command for Stata to...

    Started by Melih‎, 02-18-2017 10:49 AM
    stata
    • Replies: 0
    • Views: 201
    02-18-2017, 10:49 AM Go to last post
  3. sttocc to create a nested case-control study in stata

    Hi all, I am using sttocc to created a nested case control study, within an incident epilepsy population. The commands therefore reads as follows:...

    Started by hayley‎, 02-09-2017 07:37 AM
    nestec case-control study, stata, sttocc
    • Replies: 0
    • Views: 256
    02-09-2017, 07:37 AM Go to last post
  4. Loops and Preserve

    I have this piece of code: gen graph =. preserve forvalues v = 10(1)12 { replace graph = `v' drop if sales`v' == 0 | sales`v' ==. |...

    Started by minnari‎, 01-24-2017 08:28 PM
    • Replies: 0
    • Views: 501
    01-24-2017, 08:28 PM Go to last post
  5. I can't run ado. Message about wrong adopath.

    I installed this package Menu-driven X-12-ARIMA seasonal adjustment in Stata And i also installed the x12a64 package on my PC. Its location is...

    Started by jfca283‎, 04-04-2014 10:55 AM
    • Replies: 3
    • Views: 2,822
    01-19-2017, 10:06 PM Go to last post
  6. How can I calculate the area of ROC curve of a Cox model?

    I have created a Cox regression model on a dataset. Now I want to test its performance with the ROC curves, but I don't find any command in stata to...

    Started by Lore88x‎, 11-16-2012 09:19 AM
    • Replies: 4
    • Views: 4,768
    01-09-2017, 10:54 PM Go to last post
  7. About stci command

    Dear experts, After using stci command, . stci if factorA==0, by(factorB) failure _d: pfsevent analysis time _t: ...

    Started by bestmic‎, 01-02-2017 11:22 AM
    • Replies: 0
    • Views: 493
    01-02-2017, 11:22 AM Go to last post
  8. Recursive Partitioning in Stata

    Dear all expert, I am going to review the survival of a group of cancer patients. I would like to explore the potential use of recursive...

    Started by bestmic‎, 12-20-2016 11:42 AM
    • Replies: 2
    • Views: 655
    01-02-2017, 09:01 AM Go to last post
  9. Median Survival after multivariate Kaplan Meier Analysis

    Dear experts, I am a newbie. I am performing an KM analysis and obtain the KM curve by the followings: stcox outcome factorA factorB...

    Started by bestmic‎, 01-02-2017 08:57 AM
    • Replies: 0
    • Views: 194
    01-02-2017, 08:57 AM Go to last post
  10. Coding for control variables in Stata 14 in linear regression?

    Hi - I need to control for two variables in my linear regression, the code thus far is; sort dde2 by dde2: regress sustain I have two...

    Started by TruroJP‎, 12-02-2016 05:26 PM
    code, regression, regression analysis, stata, stata 14
    • Replies: 0
    • Views: 865
    12-02-2016, 05:26 PM Go to last post
  11. Meta-analysis of diagnostic test using MCMC

    Hi. Is there some good hands-on tutorial about running MCMC analysis for the meta-analysis of diagnostic tests? Is it inbuilt STATA Bayesian analysis...

    Started by Vlajkony‎, 07-16-2016 08:42 PM
    diagnostic test, mcmc, mcmcglmm, meta-analysis
    • Replies: 8
    • Views: 1,538
    11-23-2016, 02:01 AM Go to last post
  12. Hod do I display raw data from bootstrap result in Stata

    Dear all, I have been given the required code to create a bootstrap analysis of the difference in costs between two groups. I now need to see the...

    Started by CE479‎, 10-01-2016 03:34 AM
    • Replies: 1
    • Views: 1,070
    10-03-2016, 04:29 AM Go to last post
  13. gen newvar "3+"

    Amateur stata user here. I have created a new variable ("traumas") that is meant to have categories "%reporting" 0, 1, 2, or 3+ health conditions...

    Started by nazmi1‎, 10-02-2016 09:11 PM
    • Replies: 0
    • Views: 513
    10-02-2016, 09:11 PM Go to last post
  14. How to keep omitted categorical variable on clogit model??

    Currently I am doing choice experiment modelling using conditional logistic model. I am treating all of my attributes as categorical variables....

    Started by ari raka‎, 09-23-2016 08:14 AM
    categorical, choice experiment, clogit, omitted variables, stata 14
    • Replies: 1
    • Views: 579
    09-23-2016, 08:44 AM Go to last post
  15. Find corresponding value to extreme score

    Hi, I have data that look something like: id score1 score2 score3 year1 year2 year3 5 90 42 64 2000 2001 2002...

    Started by leonedelman‎, 09-20-2016 07:08 PM
    • Replies: 0
    • Views: 470
    09-20-2016, 07:08 PM Go to last post
  16. Graphics of Time Series (tsset command isn't working due to repeated time values)

    Hey everyone, I have a question regarding the creation of graphics for time series. I have two rows with one being the study subject ( 1...

    Started by Sophie Hoffmann‎, 09-13-2016 10:00 AM
    graph, graphics, line graph, time series
    • Replies: 0
    • Views: 495
    09-13-2016, 10:00 AM Go to last post
  17. Thumbs up To computing residuals and predicting values

    Goodafternoon, I am trying to compute residuals. In the first time, I do my regression such as : regress v1 v2 v3 v4 v5 pays_encode1...

    Started by Charlotte63‎, 09-12-2016 09:47 AM
    • Replies: 0
    • Views: 398
    09-12-2016, 09:47 AM Go to last post
  18. Question Help needed!!!How to write STATA code to count the number for the following question?

    I have 5 variables (a1,a2,a3,a4,a5), all of which are categorical and coded as 0=no, 1=yes,98=refuse to report, 99=unknown. I need to calculate the...

    Started by belindalimm‎, 09-07-2016 01:23 AM
    • Replies: 0
    • Views: 400
    09-07-2016, 01:23 AM Go to last post
  19. using wild card for matching string variables

    Hi, I have created a string (pattern) variable containing 0 and 1. For example, a string pattern 0000000011 means the person appears in 10 years of...

    Started by Ujjwal K Das‎, 08-15-2016 04:16 AM
    stata 13, string variable
    • Replies: 0
    • Views: 694
    08-15-2016, 04:16 AM Go to last post
  20. String: Pull characters before "-"

    Hi guys, I have a string variable that looks something like this: MMDC-6MA. I need to extract the first letters before the sign "-", So I need...

    Started by Marvin85‎, 08-04-2016 06:13 PM
    string
    • Replies: 0
    • Views: 629
    08-04-2016, 06:13 PM Go to last post
  21. Conditional multinomial in STATA - similar to hospital choice models

    Hello, I am having a card time figuring out which conditional logit test to run, and how to structure my data. The set-up is: I am trying to...

    Started by dpac‎, 08-03-2016 04:54 PM
    • Replies: 0
    • Views: 373
    08-03-2016, 04:54 PM Go to last post
  22. mean-test

    Dear colleagues, Im trying to run a mean test (ttest) for the variable satisfaction with life by neighborhoods, however Im considering 3...

    Started by Barreto‎, 07-20-2016 07:50 PM
    • Replies: 1
    • Views: 632
    07-20-2016, 08:00 PM Go to last post
  23. Granger Causality and Heteroskedasticity

    Hello! My name is Magdalena and I have the following problem; I have daily returns of 60 firms from the year 2000 to 2015. My aim is to test for...

    Started by magdalenag‎, 07-11-2016 12:51 PM
    granger, heteroskedasticity, stata
    • Replies: 1
    • Views: 537
    07-11-2016, 02:54 PM Go to last post
  24. switch x and y axis in a dot graph

    Hello I am new to this forum and stata, but I tried really hard to construct a special dot graph. It would be great if you could help me. I...

    Started by Olivia2‎, 07-03-2016 10:58 AM
    • Replies: 0
    • Views: 590
    07-03-2016, 10:58 AM Go to last post
  25. groups in xtmixed

    Hi all Having some issues with Stata when running xtmixed. The main issue being the number of groups (in initial Group Variable table) is not what...

    Started by gy13her‎, 06-27-2016 08:35 AM
    multilevel models, stata
    • Replies: 0
    • Views: 517
    06-27-2016, 08:35 AM Go to last post
  26. Labelling dummy variables with underlying variable names

    Hey there, I'm very new to Stata and fairly certain this has a simple solution but i don't seem to find it. I have a Dataset with 200 different...

    Started by Chris2291‎, 06-22-2016 10:48 AM
    • Replies: 0
    • Views: 540
    06-22-2016, 10:48 AM Go to last post
  27. Bar graph and box-and-whisker plot sorted over binary variable

    Hi, I have a dataset that looks like that below. I want to create graphs like the example below: The variable names var1-var4 in my...

    Started by teapot‎, 06-21-2016 04:00 PM
    • Replies: 0
    • Views: 440
    06-21-2016, 04:00 PM Go to last post
  28. Estimating treatment effect using movestay command

    Hello, I want to use the movestay command in Stata but my data is complicated and Im unsure how to proceed. I would like to estimate the...

    Started by MichielvanRossum‎, 06-05-2016 09:27 AM
    movestay, stata, switching regression
    • Replies: 1
    • Views: 1,219
    06-08-2016, 12:09 PM Go to last post
  29. Write an equation in mata format

    Dear stata users, I am trying to setup the following equation in mata format: C1 + C2*((lnx)^2- C3)+ C4* ((lnx)^2*lnx- C5) I have attached the...

    Started by ledzep‎, 05-29-2016 11:12 AM
    • Replies: 0
    • Views: 616
    05-29-2016, 11:12 AM Go to last post
  30. Marginal effects after logistic

    I have all binary/categorical variables, and I am trying to decide between mfx/margins to obtain marginal effects in Stata. They seem to provide...

    Started by oncearunner‎, 04-14-2016 01:41 PM
    logistic regression stata, marginal effects
    • Replies: 2
    • Views: 801
    05-28-2016, 08:07 AM Go to last post
  31. svyset

    Hi, I have a database in which there are patients. Sample size is 1000. (100% response due to spare sample/replacement etc) 20 GPs were involved....

    Started by Drone999‎, 05-26-2016 09:18 AM
    survey analysis, survey weights
    • Replies: 0
    • Views: 430
    05-26-2016, 09:18 AM Go to last post
  32. Overlaying two histograms/lines?

    Hi all! I am going nuts in trying to do a graph which to me looks like the basic graph ever. Basically I have two variables: the score that the...

    Started by belfagor71‎, 06-25-2013 07:00 AM
    • Replies: 5
    • Views: 10,549
    05-25-2016, 10:32 AM Go to last post
  33. Pre and post with control: Difference in median

    I created the difference between pre and post UOF counts and then generate a variable that represents the median for each group. base on my...

    Started by Marvin85‎, 05-17-2016 05:01 PM
    median difference
    • Replies: 7
    • Views: 864
    05-19-2016, 12:51 PM Go to last post
  34. Stata: Drop company if last stock value of prior year is smaller than a certain value

    Hey all, I have a CRISP dataset with daily stock values for campanies from the first of december 2010 until the end of 2011. Now I need to...

    Started by Prometheus94‎, 05-15-2016 11:32 AM
    • Replies: 0
    • Views: 484
    05-15-2016, 11:32 AM Go to last post
  35. regression OLS e IV

    I need estimate a model specification by OLS and a model IV and endogeneity (cross-sectional data). When I try to estimate OLS, the standard errors...

    Started by Carla VN‎, 05-13-2016 03:25 PM
    • Replies: 0
    • Views: 438
    05-13-2016, 03:25 PM Go to last post
  36. Problem Logistic regression

    Hi, I want to do a logistic regression on proportional data in Stata that I've done with R before. So in R I used cbind to combine the two rows...

    Started by Buckyball‎, 05-10-2016 09:20 AM
    • Replies: 0
    • Views: 529
    05-10-2016, 09:20 AM Go to last post
  37. Help making a basic but large table in Stata

    Thanks for reading :wave: I am a beginner :confused: and trying to make descriptive tables. I am trying to create an 18x18 cross-table. The 18...

    Started by statakiss‎, 04-27-2016 04:51 AM
    big data in stata, cross tabulation, table
    • Replies: 0
    • Views: 655
    04-27-2016, 04:51 AM Go to last post
  38. Stata: Test that the difference between two groups = -1

    Does anyone know how to test the hypothesis that the difference between people without and with kids = -1 per night in Stata? I have the data set...

    Started by hbossut‎, 04-23-2016 02:42 PM
    alternative hypothesis, hypothesis, null hypothesis, stata, test
    • Replies: 0
    • Views: 508
    04-23-2016, 02:42 PM Go to last post
  39. Moved: Graphically check linearity in logit regression

    Started by Phaedrus‎, 07-21-2014 08:50 AM
    • Replies: -
    • Views: -
    04-19-2016, 11:59 AM Go to last post
  40. Regression with missing data

    Hi all So I just want to do a quick linear regression, but when I initially tried I had an error (r(2000 no observations). I've realised my issue...

    Started by gga10hr‎, 04-15-2016 02:53 PM
    linear regression, missing values
    • Replies: 1
    • Views: 537
    04-15-2016, 03:18 PM Go to last post
  41. Matrix multiplication operation in stata

    Hi I declared the following matrix mat p_h1=J(22,3,.) that contains some numbers. And now i need this simple task. Create another matrix with the...

    Started by jfca283‎, 04-12-2016 12:09 PM
    • Replies: 0
    • Views: 525
    04-12-2016, 12:09 PM Go to last post
  42. Drop duplicates by criteria :confused:

    Hello, i want to drop duplicates, but using a criteria. For example i am working with a dataset who has id for a lot of student, but the same student...

    Started by Banana_fish‎, 04-11-2016 07:15 PM
    • Replies: 0
    • Views: 538
    04-11-2016, 07:15 PM Go to last post
  43. Can the if option of xtreg unbalance Panel Data?

    Hi everyone, I have a tricky question regarding the way xtreg works. It amy also be a very simple question Using a balanced Panel Data with 10...

    Started by Alexandra 82‎, 04-03-2016 11:16 AM
    balanced data, unbalanced data, xtreg
    • Replies: 1
    • Views: 697
    04-04-2016, 03:47 AM Go to last post
  44. Latent Class Analysis with Stata

    Hi, Have anyone used Stata for Latent Class Analysis? I want to estimate willingness to pay with it, but I'm not sure it is possible with this...

    Started by jsuazo‎, 06-14-2013 11:55 AM
    2 Pages
    1 2
    lca, stata
    • Replies: 20
    • Views: 17,395
    04-01-2016, 03:18 PM Go to last post
  45. no observations r(2000)

    Dear all, I have just started using Stata for a time series analysis. However, there has already been to much failure before even started the acutal...

    Started by beckham-7‎, 10-25-2011 05:30 AM
    • Replies: 4
    • Views: 12,611
    03-31-2016, 02:21 PM Go to last post
  46. generating average with missing more than X values

    hi all, let's say i want to take the average of 5 scores for class tests for each student in a class. the data looks like the below EXCEPT...

    Started by bvowe‎, 01-05-2016 10:59 AM
    average, data, stata
    • Replies: 3
    • Views: 809
    03-30-2016, 11:52 AM Go to last post
  47. Extrapolation methods book

    Can someone recommend me some good book about extrapolation (ideally with STATA) which do not cover only survival but also extrapolations of other...

    Started by Vlajkony‎, 03-27-2016 12:10 PM
    • Replies: 1
    • Views: 1,325
    03-27-2016, 06:22 PM Go to last post
  48. Unhappy How program a Propensity Score Matching?

    Hello I need to "program" a Propensity Score Matching, but using only loops and not pscore or other command, my problem is that i dont now how...

    Started by Banana_fish‎, 03-16-2016 11:44 AM
    • Replies: 1
    • Views: 939
    03-16-2016, 12:53 PM Go to last post
  49. Adding up values of variables

    Hey guys, I got a rather complicated problem: I have two variables, ID and Country ID Country 11 US 11 ...

    Started by Andreas Hofer‎, 03-10-2016 10:59 AM
    calculation, stata, variable
    • Replies: 0
    • Views: 791
    03-10-2016, 10:59 AM Go to last post
  50. Question how join two tables into one

    for example i have var: var1 1 2 3 i want to add new obs . local new = _N + 1 . set obs `new'

    Started by wolf7808‎, 03-09-2016 11:24 AM
    • Replies: 0
    • Views: 555
    03-09-2016, 11:24 AM Go to last post
  51. Save graph vs saving

    Hello guys, What is the different between the "saving" options at the end of the command and the new command save graph filename? I have a do...

    Started by Marvin85‎, 03-01-2016 01:38 PM
    graph, histogram save
    • Replies: 2
    • Views: 824
    03-04-2016, 07:57 AM Go to last post
  52. Learning to make programs

    Hey guys. So I'm learning to program ado's and I have a question. Say I want to make a random joke generator in stata from a list of 100 jokes....

    Started by starpen‎, 02-27-2016 03:09 PM
    ado, code, program
    • Replies: 0
    • Views: 689
    02-27-2016, 03:09 PM Go to last post
  53. Date variable- only month

    Hi Guys, I have a date variable, save in the type below. example 03 Jul 14 DateToday long %dD_m_Y I would like to...

    Started by Marvin85‎, 07-24-2014 12:05 PM
    date, month
    • Replies: 5
    • Views: 1,451
    02-23-2016, 10:34 AM Go to last post
  54. Help with data management please

    Hi, I have a dataset that are all string and missing data are as NA. I am trying to convert it to numeric with encode command. I don't know how to...

    Started by Newcomer‎, 02-15-2016 06:19 AM
    • Replies: 1
    • Views: 755
    02-15-2016, 08:27 AM Go to last post
  55. ID-number in Stata

    Dear you, I might have a stupid question, but I have not found the answer on google, and I hope someone can help. I have a dataset where...

    Started by sju‎, 02-07-2016 12:02 PM
    identification, social security number
    • Replies: 1
    • Views: 807
    02-12-2016, 03:42 AM Go to last post
  56. ANOVA repeated measures

    Struggeling to find the right command in STATA for this repeated measures. I am going to to a repeated measures of bloodpressure testing for...

    Started by ama_nil‎, 02-11-2016 09:37 AM
    • Replies: 1
    • Views: 644
    02-11-2016, 11:54 AM Go to last post
  57. New ID variable using date variable

    I have a ID# for all my teachers but I noticed that there are some instances that an 2 or more teachers can have the same ID#. I want to create...

    Started by Marvin85‎, 02-04-2016 12:06 PM
    date variable, id variable
    • Replies: 2
    • Views: 687
    02-05-2016, 09:48 AM Go to last post
  58. Loop and mata - Foreach file doesn't work

    Hi I could get this simple task to work mat rama=J(17,3,.) forval j=1/17 { quiet summ sexo if b14_2_rev3n==`j' local b14=r(sum_w)...

    Started by jfca283‎, 02-01-2016 02:44 PM
    • Replies: 0
    • Views: 692
    02-01-2016, 02:44 PM Go to last post
  59. stata matrix to Mata?

    Hi I have a matrix in Stata but i need to export it to Mata. I've been reading abiut the issue i'm asking and i couldn't get a simple order to...

    Started by jfca283‎, 01-22-2016 03:15 PM
    • Replies: 2
    • Views: 919
    02-01-2016, 11:07 AM Go to last post
  60. Malmquist Productivity Index With STATA 13

    The Malmquist Index (MI) with sTATA 13 is a bilateral index that can be used to compare the production technology of two economies. It is named after...

    Started by OlhDt_semarang‎, 01-28-2016 03:13 AM
    • Replies: 0
    • Views: 1,090
    01-28-2016, 03:13 AM Go to last post

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