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Forum: Stata

Stata usage and programming, Stata help

  1. Formatting into time series data?

    I am trying to format my date parameter so that STATA recognizes it as time series parameter. The format is the most basic of form: 2000, 2001, 2002...

    Started by Tony123‎, Yesterday 02:34 PM
    • Replies: 11
    • Views: 137
    Today, 10:47 AM Go to last post
  2. Heckman Selection for Multinomial Outcomes

    Hi everyone, I have an important questions with respect to heckman adjustment for categorial outcomes: I am searching for a solution to control...

    Started by Chris86‎, 03-02-2015 11:19 AM
    • Replies: 0
    • Views: 66
    03-02-2015, 11:19 AM Go to last post
  3. Count values of a variable based on another variable

    How can I count the number os Grantees that have used the ipad to collect participants information. In this case, 2 grantees CA0083 and CA0214 used...

    Started by Marvin85‎, 02-19-2015 06:43 PM
    count, count if
    • Replies: 4
    • Views: 282
    02-21-2015, 07:44 AM Go to last post
  4. Random effect model report R2 or chi2

    What is important to report in a random effect model? R2: within, between, overall, or Wald chi2? The thing is that when adding a variable, I find...

    Started by luyinxi‎, 02-20-2015 05:25 AM
    • Replies: 0
    • Views: 89
    02-20-2015, 05:25 AM Go to last post
  5. Using bcal function

    Hi all. I am a total noob for asking this, but even though Ive read all statacorp has to offer on the subject, I can not get the bcal function to...

    Started by statkinglegend‎, 02-19-2015 05:38 AM
    • Replies: 0
    • Views: 111
    02-19-2015, 05:38 AM Go to last post
  6. first -difference command on STATA

    I have a mcor panel for about 40 countries for 24 years .I want to take the first -difference for a variable for each country's time series. Do you...

    Started by abc‎, 12-17-2013 08:44 AM
    • Replies: 7
    • Views: 14,807
    02-16-2015, 09:14 AM Go to last post
  7. generate new var from several string variables

    I have 10 string variables (imp1, imp2, ..., imp10). I want to generate only one variable which summarizes the content of the 10. I used the...

    Started by andik‎, 02-15-2015 12:00 AM
    • Replies: 1
    • Views: 194
    02-15-2015, 10:26 PM Go to last post
  8. Create a variable based on a hierarchy

    Hello friends, I have a dataset where each services offer by providers is in one row. However my goal is that each provider represents one row. ...

    Started by Marvin85‎, 02-13-2015 02:42 PM
    reshape
    • Replies: 0
    • Views: 164
    02-13-2015, 02:42 PM Go to last post
  9. Reshape, collapse, restructure

    Hello guys, These are my variables: GranteeID Funding= Funding type there are 4 funding types (a,b,c,d) ProviderID=provider of the services...

    Started by Marvin85‎, 02-12-2015 10:59 AM
    collpase, reshape
    • Replies: 1
    • Views: 140
    02-13-2015, 10:13 AM Go to last post
  10. egen count only but unique values

    Hello, Below is how my dataset looks like: GranteeID ProviderID 11 11 12 11 26 27 78 27 78 27

    Started by Marvin85‎, 02-12-2015 05:01 PM
    count unique values, egen count, unique
    • Replies: 0
    • Views: 142
    02-12-2015, 05:01 PM Go to last post
  11. Learning Stata - Variables

    Hi, This is my first post on here and learning Stata although been working with it for some time but only as a user and not in a programming...

    Started by IanB‎, 02-11-2015 03:13 PM
    • Replies: 0
    • Views: 157
    02-11-2015, 03:13 PM Go to last post
  12. Create an index with the PCA in Stata 11 from the Demographic and Health Survey

    Dear all, I am a new user. I am writing my Master's thesis and as a part of it I am analyzing the data from the Demographic and Health Surveys...

    Started by lillaus‎, 11-09-2013 12:31 PM
    • Replies: 1
    • Views: 1,411
    02-11-2015, 09:31 AM Go to last post
  13. Show all variable label

    I am just running frequency tables but I need to see the entire variable label. stata only give me a portion of the variable label when it is too...

    Started by Marvin85‎, 02-02-2015 01:39 PM
    var label
    • Replies: 2
    • Views: 238
    02-10-2015, 05:19 PM Go to last post
  14. Use of holdout cases generated in SPSS in STATA

    I am working on consumer preferences for fish, using conjoint analysis. My experimental design was generated in spss using orthogonal design, but my...

    Started by Edith Gondwe‎, 02-10-2015 08:22 AM
    conjoint analysis, holdout cases, spss, stata
    • Replies: 0
    • Views: 108
    02-10-2015, 08:22 AM Go to last post
  15. Fama Macbeth regression help

    Dear reader, We are stuck with performing a Fama Macbeth regression in STATA. The following sums up our steps, and where we got stuck. Please see...

    Started by Dan-14‎, 02-09-2015 07:08 AM
    • Replies: 0
    • Views: 138
    02-09-2015, 07:08 AM Go to last post
  16. Question a few questions for th weekend

    hello, Whenever im trying to use acprplot or towway commands I receive this message, can someone help me with it: (note: scheme s2color not...

    Started by gidlin1‎, 02-06-2015 12:51 PM
    • Replies: 0
    • Views: 158
    02-06-2015, 12:51 PM Go to last post
  17. Having problem with (if and else if) STATA syntax

    Dear Members, I am having problem with using (if and else if ) STATA command using the following logic. If variable b>c and b ~=a and a=c,...

    Started by SSue‎, 02-03-2015 01:49 PM
    • Replies: 0
    • Views: 194
    02-03-2015, 01:49 PM Go to last post
  18. How to extend limit of local/tokenize?

    Dear all, I have a problem in the implementation of the user written Tetrad Method. There must be some problem with the limit of local or...

    Started by KarinKlee‎, 02-02-2015 05:44 AM
    • Replies: 0
    • Views: 154
    02-02-2015, 05:44 AM Go to last post
  19. Constrained coefficients in a VAR model

    I have been trying to find out how to constrain coefficients in a VAR model. In a particular model, I need the coefficients of the lags to sum to...

    Started by darth.gnosus‎, 02-01-2015 08:50 PM
    constrained var
    • Replies: 0
    • Views: 115
    02-01-2015, 08:50 PM Go to last post
  20. any number at the end of string extraction

    Hi guys, I need to extract the number at the end of a string variable. The problem is that there are also number at the beginning of the string. ...

    Started by Marvin85‎, 01-29-2015 10:52 AM
    string
    • Replies: 0
    • Views: 156
    01-29-2015, 10:52 AM Go to last post
  21. Covariance matrix from DCC-MGARCH

    Hi. Is there any way to display conditional covariance matrix obtained from estimation through DCC-MGARCH model? Model has following form H= DRD and...

    Started by lucychix‎, 01-27-2015 06:25 PM
    • Replies: 0
    • Views: 164
    01-27-2015, 06:25 PM Go to last post
  22. Lightbulb principal component analysis for panel data

    Dear forum members, I have a panel data and i used PCA for make an index with stata, i'm in doubt with this way , stata give me a wrong index!!...

    Started by eli ahmadpour‎, 01-26-2015 04:05 PM
    • Replies: 2
    • Views: 259
    01-27-2015, 06:18 AM Go to last post
  23. Stat/Tranfer Problem opening dataset

    Hello guys, I recently purchased Stat/Transfer, a software that allows to convert SPSS file to Stata files. The transfer went well however when I...

    Started by Marvin85‎, 01-22-2015 03:45 PM
    stat.transfer
    • Replies: 1
    • Views: 181
    01-25-2015, 11:41 PM Go to last post
  24. Lightbulb problem with xtdpdsys

    Hello dear forum members! i have a dynamic panel data and i want to estimate an Simultaneous Equations Model with system gmm and i have 4 equation...

    Started by eli ahmadpour‎, 01-22-2015 03:47 PM
    • Replies: 0
    • Views: 205
    01-22-2015, 03:47 PM Go to last post
  25. Unhappy Output Basic Statistics in Excel via - tabout -

    Hi, I am trying to output in Excel the mean and median of a few variables that we will call var1, var2, var3 etc.. by SECURITY and EVENT_WINDOW,...

    Started by amazon‎, 01-21-2015 10:07 AM
    tabout excel stata export
    • Replies: 1
    • Views: 202
    01-22-2015, 01:47 AM Go to last post
  26. Generating standardized standard errors

    I am testing a structural equation model using Stata. I need to report standardized direct, indirect and total effects with associated standard...

    Started by amsavage‎, 01-19-2015 05:25 PM
    sem, standard errors, standardization, stata
    • Replies: 0
    • Views: 173
    01-19-2015, 05:25 PM Go to last post
  27. Ploting marginal predicted probabilities with gllapred after gllamm

    Dear all, I am trying to plot marginal predicted probabilities after I fit a multilevel logit model with the command gllamm. My model is a...

    Started by Joel Smith‎, 01-19-2015 02:44 PM
    • Replies: 0
    • Views: 205
    01-19-2015, 02:44 PM Go to last post
  28. Help with growth model

    Hi, I have a research question that I am not sure how I can code it in stata. I think I have to use growth model, but not sure how! I appreciate...

    Started by anna_258‎, 01-17-2015 11:08 AM
    • Replies: 0
    • Views: 151
    01-17-2015, 11:08 AM Go to last post
  29. How to replace values of one sample using the values from another sample

    Sorry for the confusion that the title might result, but my question is the following: Suppose I have two samples of observations, say, CPS 2000...

    Started by BTan‎, 01-16-2015 09:09 PM
    • Replies: 0
    • Views: 172
    01-16-2015, 09:09 PM Go to last post
  30. How to obtain standard deviation for COUNT data , while using Survey data and subpopu

    hello all, I have previously posted a question about obtaining SD for mean in survey setting and was able to get answer from statalist(thank you,...

    Started by ritupuri‎, 01-16-2015 07:39 PM
    survey stata
    • Replies: 0
    • Views: 170
    01-16-2015, 07:39 PM Go to last post
  31. Graphing y_hat

    Hi All, I'm a novice user of STATA and seek your help. I have a regression Eg: Y = alpha + beta1 (X1) + beta2 (X1)^2 + beta3 (D1) + Gamma1 (P1)...

    Started by Equate‎, 01-07-2015 02:57 PM
    • Replies: 1
    • Views: 648
    01-15-2015, 06:03 AM Go to last post
  32. Confused with hausman

    Hi all! I ran FE and RE on panel data of 53 countries. Unfortunately, Hausman is not giving proper results and says 'model fitted on these data...

    Started by mahamfurqan‎, 01-14-2015 07:59 AM
    • Replies: 0
    • Views: 310
    01-14-2015, 07:59 AM Go to last post
  33. How to draw restricted cubic splines after logistic regression in Stata 12.1?

    Dear everyone, I would like to draw resticted cubic splines in a cohort study, including OR and 95% CI, after multivariate Logistic regression...

    Started by Keiichi‎, 12-29-2014 09:25 PM
    • Replies: 2
    • Views: 446
    01-07-2015, 04:53 AM Go to last post
  34. Copying observations from t to t+1

    Hello everybody! Could you please help me with the following problem. I have a panel data where individuals "ind" are nested within...

    Started by Slavutich‎, 01-06-2015 07:27 PM
    • Replies: 0
    • Views: 158
    01-06-2015, 07:27 PM Go to last post
  35. Appropriate excel form for panel quarterly data

    Dear all, I hope you are doing well. I am trying to shape an excel sheet in order to be read by Stata (File --> Import). I have quarterly data...

    Started by Kostas‎, 01-06-2015 02:44 PM
    • Replies: 0
    • Views: 140
    01-06-2015, 02:44 PM Go to last post
  36. saving tabstat output

    I have panel data with the cross-section as American states (n=48) and time as years (n=25). I want to want to take the median of the dependent...

    Started by rbsoc‎, 12-31-2014 10:15 AM
    • Replies: 0
    • Views: 333
    12-31-2014, 10:15 AM Go to last post
  37. survey analysis with stata

    Hi I need some guidance. My goal is to test that there is not a difference between two variables, var1 and var2 in a survey. I declared as sample...

    Started by jfca283‎, 12-29-2014 11:03 AM
    • Replies: 0
    • Views: 206
    12-29-2014, 11:03 AM Go to last post
  38. String to numeric (keep real numbers) ignore

    hello friends, I have an ID variable but some observation contain strings. Below is a example of my observations. I tried to used the string,...

    Started by Marvin85‎, 12-15-2014 04:25 PM
    ignore, strong to num
    • Replies: 4
    • Views: 543
    12-19-2014, 12:34 PM Go to last post
  39. hypothesis confirmation

    Hello everyone. I am working on a survey logistic procedure on stata. I have one problem with the GOF test. The only option is an F test for testing...

    Started by Chinchilla‎, 12-13-2014 05:05 PM
    • Replies: 3
    • Views: 399
    12-18-2014, 03:40 AM Go to last post
  40. classification logistic regression

    Hello, I am trying to find a command for the equivalent of "estat classification" after a simple logistic regression. Are there any similar commands...

    Started by Chinchilla‎, 12-17-2014 04:27 AM
    • Replies: 0
    • Views: 194
    12-17-2014, 04:27 AM Go to last post
  41. creating variables

    i want to create variables and i need some help. new variable names are on the left as below. The parent variable is intcov IntCov1 Variable...

    Started by bighush‎, 11-18-2014 09:33 PM
    • Replies: 3
    • Views: 378
    12-15-2014, 06:49 PM Go to last post
  42. STATA - Finance - Portfolio Volatility

    Hi all, I am experiencing difficulties to calculate portfolio volatility each period ("rebalance") given the following variables (enclosed)....

    Started by amazon‎, 12-02-2014 08:36 PM
    • Replies: 2
    • Views: 416
    12-15-2014, 06:46 PM Go to last post
  43. percentages outside the slides

    Hello If got a Pie Chart with a really small slide. Insted of having the percentages inside the slides, I would like to have them outside the Pie...

    Started by roger20‎, 12-11-2014 05:04 AM
    • Replies: 3
    • Views: 290
    12-13-2014, 06:08 PM Go to last post
  44. running simultaneous-equation model using 2 or 3sls

    Dear colleagues I am running simultaneous-equation model consists of the following two equations: Y1 = a+b1 x1 + b2x2 + b3x3 + b4x4 (1) x2 =...

    Started by momo‎, 12-11-2014 12:54 PM
    • Replies: 0
    • Views: 247
    12-11-2014, 12:54 PM Go to last post
  45. Unique combination of variables

    Hi guys I have 15000 observations across 7 variables. I need some help with the code to generate all possible unique combinations of variables....

    Started by excelmac‎, 12-03-2014 02:08 PM
    stata, unique combination, variables
    • Replies: 2
    • Views: 325
    12-08-2014, 10:32 PM Go to last post
  46. Look for partial string on data set?

    Hi Sorry to ask this, but i really don't know how to do this tab var1 if "var2 contains text sea level" I'm not joking. I don't know. Thanks...

    Started by jfca283‎, 12-03-2014 02:20 PM
    • Replies: 1
    • Views: 319
    12-06-2014, 11:23 PM Go to last post
  47. Matrix Multiplication + Save Result by group

    Bonjour a tous, I'm trying to achieve the following multiplication VAR = W*S*W' w: S: s: I have the following variables in Stata:

    Started by amazon‎, 12-06-2014 08:20 PM
    grouped data, matrix multiplication, stata, variance
    • Replies: 0
    • Views: 210
    12-06-2014, 08:20 PM Go to last post
  48. Sample based on 2 stratas/variables

    Hello guys, I have a dataset of 90 observations (health center types). I only need 30% of my cases. I have two stratas/variables (I guess):...

    Started by Marvin85‎, 12-03-2014 03:11 PM
    bsample, sample
    • Replies: 1
    • Views: 261
    12-03-2014, 05:40 PM Go to last post
  49. General doubt. Can i label a string variable?

    Hi I need to label a variable. The problem is that the variable is a string one. I run a loop and i get this error: may not label strings...

    Started by jfca283‎, 12-01-2014 07:00 AM
    • Replies: 3
    • Views: 342
    12-02-2014, 10:32 AM Go to last post
  50. creating a loss dummy variable

    i have to create a loss dummy variable when another variable eg. net income is negative in the current and previous years.And it should be unique for...

    Started by bighush‎, 11-01-2014 11:17 AM
    • Replies: 3
    • Views: 418
    11-30-2014, 03:27 PM Go to last post
  51. Comparing sets of variables measured at 2 time points

    I have 3 categorical variables that were measured at a time point = 1 and then later at a time point = 2. I am interested in trying to summarize...

    Started by oncearunner‎, 10-23-2014 12:07 PM
    • Replies: 2
    • Views: 455
    11-29-2014, 12:34 AM Go to last post
  52. Loop according existance of variable label

    Hi. I'm a bit lost with this. I try to write the label for the varx. But in some of the databases the var label exist and in others doesn't. I...

    Started by jfca283‎, 11-28-2014 03:25 PM
    • Replies: 1
    • Views: 262
    11-28-2014, 10:18 PM Go to last post
  53. Outreg problem with reporting Pseudo-R2 with Quantile regression

    Dear Talk stats users, I need help with reporting the Pseudo-r2 (using outreg2) when doing quantile regressions in stata (Qreg, Stata 12). How...

    Started by Olleolle‎, 04-25-2013 05:34 AM
    • Replies: 7
    • Views: 2,125
    11-28-2014, 12:39 AM Go to last post
  54. !missing in two variables

    Hello I ve got panel datas and need to eliminate (!missing) observations. Now the 2 variables have their missings on different observations...

    Started by roger20‎, 11-24-2014 09:33 AM
    • Replies: 1
    • Views: 386
    11-25-2014, 04:00 AM Go to last post
  55. create matrix with rows and columns according to variables length?

    Hi I need to create a loop. The issue is i have 2 variables, X and Y. And both are strings. So, how do i create a matrix with the form J(lengthX,...

    Started by jfca283‎, 11-23-2014 12:18 AM
    • Replies: 3
    • Views: 687
    11-24-2014, 03:26 PM Go to last post
  56. Problem when running the CDSIMEQ in Stata

    Dear All, I am trying to estimate a system of simultaneous equation where one of the endogenous variable is continuous and the other endogenous...

    Started by fayugo‎, 11-21-2014 06:45 AM
    • Replies: 0
    • Views: 2,029
    11-21-2014, 06:45 AM Go to last post
  57. Stacked bar chart, Pre vs Post

    Hi Guys, Basically I have two variables test_pre and test_post. My variables assessed participants self-assessed knowledge using a 5 point liker...

    Started by Marvin85‎, 11-19-2014 05:14 PM
    bar chart, pre post, stacked chart
    • Replies: 2
    • Views: 6,449
    11-20-2014, 07:20 AM Go to last post
  58. Calculate Systematic Risk

    Hi guys, i want to investigate the dividendpolice of german firms. I have a panel data set from 1989 - 2013. I use a logit regression to estimate the...

    Started by Rookery‎, 11-19-2014 11:05 AM
    • Replies: 0
    • Views: 1,876
    11-19-2014, 11:05 AM Go to last post
  59. Hausman test after xtregar negative chi2

    Dear all, I'm performing a Hausman test on panel data to determine whether to choose Random Effects or Fixed Effects for my analysis with AR(1)....

    Started by camino‎, 11-14-2014 10:14 AM
    • Replies: 1
    • Views: 643
    11-17-2014, 03:54 AM Go to last post
  60. scatter is not a twoway plot type

    Hi,I use stata11 to a a scatter commond"scatter api00 enroll".But I can't get a scatterplot.The stata said"scatter is not a twoway plot type".Who can...

    Started by Ken Tran‎, 11-15-2014 12:13 AM
    • Replies: 1
    • Views: 384
    11-16-2014, 04:48 PM Go to last post

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