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Forum: Stata

Stata usage and programming, Stata help

  1. Question Graphically check linearity in logit regression

    Hi all, I am running a logit regression where the outcome variable is binary. I am interested in checking, graphically, whether the relationship...

    Started by Phaedrus‎, 07-21-2014 07:50 AM
    2 Pages
    1 2
    • Replies: 17
    • Views: 290
    Today, 07:27 PM Go to last post
  2. Keep IDs - "too many literals" error

    Hey guys, I want to keep only certain sample of my population based on agency_id. My try was keep if agency_id==1 | agency_id==2...

    Started by Marvin85‎, 04-29-2014 11:57 AM
    error, keep id, too many literals
    • Replies: 10
    • Views: 485
    Today, 03:48 PM Go to last post
  3. household expenditure analysis

    hi, this is the first time I am using stata. I am trying to analyse the change in household expenditure with respect to the head of the household. ...

    Started by kiranj‎, Today 09:34 AM
    • Replies: 0
    • Views: 32
    Today, 09:34 AM Go to last post
  4. Question Single and double quote issue with a label define

    I'm trying to create a label define with text that has single and double quotes. Is there a way to escape these characters? Here is some of my...

    Started by jerry898969‎, 07-25-2014 03:21 PM
    • Replies: 5
    • Views: 124
    Today, 07:34 AM Go to last post
  5. Ordinal logistic regression: g-o-f test in Stata13

    I'm running an analysis on ordinal data in Stata13. I'm looking at 7 different DVs (separately), so parsimony is crucial--I will be repeating every...

    Started by layacoop‎, Yesterday 01:59 PM
    chi-square, composite score, goodness-of-fit, ordinal logistic
    • Replies: 0
    • Views: 14
    Yesterday, 01:59 PM Go to last post
  6. Exclamation no observation error r(2ooo)

    i have panel data set as follow, . xtset cn year panel variable: cn (unbalanced) time variable: year, 1970 to 2012 ...

    Started by jawhar amini‎, 07-26-2014 10:32 AM
    • Replies: 5
    • Views: 148
    Yesterday, 03:13 AM Go to last post
  7. autocorrelation and heteroskedasticity tests (panel data)

    Dear all, I have an unbalanced panel data and I want to estimate the fixed effects model. I have the following regression specification: x =...

    Started by Aiko‎, 07-25-2014 11:02 AM
    • Replies: 3
    • Views: 112
    07-25-2014, 10:40 PM Go to last post
  8. 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 11:05 AM
    date, month
    • Replies: 0
    • Views: 96
    07-24-2014, 11:05 AM Go to last post
  9. Value Labels to many Variables

    I have a series of variables with responses 1=Yes 0=No. I want to label the values of these variable in a efficient way. This is my try but it is...

    Started by Marvin85‎, 07-14-2014 01:02 PM
    foreach, label values
    • Replies: 2
    • Views: 110
    07-24-2014, 08:56 AM Go to last post
  10. Question How to convert a data stored as year (only) to 01/01/year?

    Hi, I am using STATA and in my dataset date of birth is as year (no md). I want to calculate the age. So I need the dob as mdy do that can format it...

    Started by leilafg‎, 07-23-2014 05:13 PM
    • Replies: 1
    • Views: 114
    07-23-2014, 08:34 PM Go to last post
  11. Controlling for autocorrelation in a regression

    Hi all I have a panel data; I ran the Hausman test and it showed a significant p-value, thus I conduct my regression by using 'xtreg' command +...

    Started by Man‎, 07-22-2014 08:12 AM
    autocorrelation
    • Replies: 0
    • Views: 103
    07-22-2014, 08:12 AM Go to last post
  12. Outreg2 - table with summary statistics

    I run the regression and then type: outreg2 using myfile, sum word seeout replace In Stata the table is seen with obs, mean, std.dev, min and...

    Started by Eric_B‎, 06-15-2014 02:15 AM
    • Replies: 1
    • Views: 219
    07-22-2014, 02:19 AM Go to last post
  13. Volatility of abnormal returns.

    Hi all, When employing raw returns, one defines performance volatility as the standard deviation of these raw returns over some prior period (say...

    Started by Man‎, 07-21-2014 11:04 AM
    • Replies: 0
    • Views: 70
    07-21-2014, 11:04 AM Go to last post
  14. How to save constant terms (_cons) as a new variable in STATA.

    Hello, I have an unbalanced panel data. I examine 850 mutual funds during the period of 2000-2013. I ran regressions to estimate performance by...

    Started by Man‎, 07-15-2014 03:45 AM
    constant, intercept, new variable, save, stata
    • Replies: 3
    • Views: 187
    07-21-2014, 02:30 AM Go to last post
  15. Power analysis for a 4x2 Experimental Design

    Hi everyone, I am trying to run a power analysis for a 4x2 design based on a 6x2 design. So far, the examples I've found online are for simpler...

    Started by g2007‎, 07-20-2014 12:29 PM
    • Replies: 0
    • Views: 107
    07-20-2014, 12:29 PM Go to last post
  16. merging the same number two datasets into one, but does not work

    deleted, no long available

    Started by colstat‎, 07-20-2014 12:34 AM
    • Replies: 0
    • Views: 86
    07-20-2014, 12:34 AM Go to last post
  17. Why are the predicted values similar and the regression coefficients dissimilar?

    Hello, Have searched the boards for an answer to this question to no avail, any help would be greatly appreciated. I'm running two regressions...

    Started by deesiel‎, 07-17-2014 10:21 AM
    • Replies: 7
    • Views: 241
    07-17-2014, 02:50 PM Go to last post
  18. Smile Generate Variable "quarterly_rebalancing" if "date" < "rebalancing"

    Hi all, I have about 8 years daily stock returns that I would like to transform to cumulative returns over a quarters. I would like to create a...

    Started by amazon‎, 07-10-2014 12:13 AM
    rebalancing date quarter
    • Replies: 2
    • Views: 167
    07-16-2014, 09:32 PM Go to last post
  19. How to multiply observations within one variable in Stata

    I want to multiply observations within a variable in stata. Here's how my data looks like: ID Return 1 1.1...

    Started by Man‎, 07-16-2014 11:15 AM
    • Replies: 2
    • Views: 144
    07-16-2014, 07:18 PM Go to last post
  20. Multiplication of two variables one of which is lagged

    I have a panel data. Basically I need to generate a new variable for each id and year that will be the product of the following formula: new_var(t)...

    Started by Man‎, 07-16-2014 01:27 PM
    • Replies: 2
    • Views: 124
    07-16-2014, 07:17 PM Go to last post
  21. Creating a new variable from several existing ones

    Hello, I already have ID variable, DATE variable, and now I want to create a new variable that will assign a certain number (say new id) to each...

    Started by Man‎, 07-15-2014 07:02 AM
    new variable
    • Replies: 3
    • Views: 154
    07-16-2014, 07:16 PM Go to last post
  22. Getting alphas for each fund in each year and saving them

    :wave:Dear all, I have an unbalanced panel data of monthly returns on 200 funds over 10 years. I need to estimate Fama-French alphas (with HAC...

    Started by Aiko‎, 07-15-2014 07:56 AM
    • Replies: 0
    • Views: 71
    07-15-2014, 07:56 AM Go to last post
  23. Using .dat file on Stata

    Hello all, I need to use a .dat file in Stata. I have never used this type of file before and do not know how to convert it to a format which...

    Started by econlearner‎, 06-14-2014 02:52 PM
    • Replies: 3
    • Views: 248
    07-13-2014, 11:29 AM Go to last post
  24. Unhappy Help Needed :( - Problem Basic Reshape - Stata

    Hi everybody, I have the following data: date A AAP AAPL ABC ACN ACT ACXM 8/15/2006 9.3 0.4 3.9 0.3 1 1 0.9...

    Started by amazon‎, 07-12-2014 03:58 PM
    reshape long
    • Replies: 1
    • Views: 120
    07-13-2014, 12:27 AM Go to last post
  25. Unhappy Help Needed

    Hello everyone I am new to stata and have a question to all you Pro guys: I have two variables, disease A and B. If these two disease occur at...

    Started by Usman Khalid‎, 07-08-2014 01:18 PM
    • Replies: 1
    • Views: 164
    07-12-2014, 12:53 AM Go to last post
  26. stratifying a box plot for two variables

    Dear all, this is my problem: I have two depvar and I want to graph them over two different variables in a way to obtain a combination of the two....

    Started by Rerun‎, 07-09-2014 12:08 PM
    • Replies: 0
    • Views: 110
    07-09-2014, 12:08 PM Go to last post
  27. testing size difference between 2 groups

    Hi, I am trying to compare the proportion of spending (all values except those in the percent column are in dollars) on Policy between each YC. The...

    Started by winnie1825‎, 07-07-2014 01:39 PM
    • Replies: 0
    • Views: 146
    07-07-2014, 01:39 PM Go to last post
  28. limited dependet variables : xtreg ,fe or probit / predict yhat or ..... . ??

    Dear Sir, I am having a dependent variable Credit Rating and it is a limited dependent variable. Independent variables are profibitability, firm...

    Started by ivobaren‎, 07-04-2014 05:06 PM
    • Replies: 0
    • Views: 202
    07-04-2014, 05:06 PM Go to last post
  29. STATA panel regression with fixed effects : xtreg dependent independent,fe

    Dear Sir, My professor told me to use stata with the following commands: 1 Encode Cusip,gen(Cusip1) 2 xtset Year Cusip1 3 xtreg dependent...

    Started by ivobaren‎, 07-03-2014 07:09 PM
    • Replies: 1
    • Views: 128
    07-04-2014, 02:19 AM Go to last post
  30. problem merging 1:1

    Hello all, I'm trying to merge two data sets. Data 1 contains the following variables: interview date, household longitude and latitude,...

    Started by Keily‎, 07-01-2014 11:57 AM
    1:1, merge, merging, stata
    • Replies: 2
    • Views: 179
    07-02-2014, 02:46 PM Go to last post
  31. How to interpret log independent variable in a fixed effects model

    Hi, I'm currently doing an fixed effects analysis with vaccine incidence as the dependent variable and log non-hospital healthcare spending as the...

    Started by samiam9508‎, 07-02-2014 09:05 AM
    • Replies: 1
    • Views: 176
    07-02-2014, 01:20 PM Go to last post
  32. Recode all variables missings

    How can I recode -99=. for all my variables? I think there is something that represent all variables maybe *? Or foreach X? I am not so familiar...

    Started by Marvin85‎, 06-30-2014 10:30 AM
    recode all
    • Replies: 4
    • Views: 185
    07-02-2014, 08:44 AM Go to last post
  33. Merging three files, building panel data and regression

    I'm not a complete newbie in Stata, but I think I'm probably newbie by the standards of the forum, I think. The thing is, I'm trying to build a...

    Started by Daeiooo‎, 07-01-2014 09:29 PM
    merge variables, panel data, stata
    • Replies: 1
    • Views: 123
    07-02-2014, 02:29 AM Go to last post
  34. graphing an interaction in Stata

    Hello, I am trying to find the correct way to graph an interaction effect between two continuous variables in Stata. My regression, the code is ...

    Started by jesse‎, 11-19-2012 02:31 AM
    • Replies: 2
    • Views: 3,806
    06-30-2014, 08:43 AM Go to last post
  35. Question How to draw cubic splines after Cox regression in Stata 11.1?

    Hi everyone:), In a cohort study, I would like to draw cubic splines, including HR and 95% CI, after Cox regression adjusted for age and sex. Yet,...

    Started by xiaoyanhuang‎, 11-10-2011 02:10 PM
    • Replies: 11
    • Views: 5,540
    06-26-2014, 03:26 AM Go to last post
  36. How to construct industry portfolio?

    Good afternoon, all! My problem is constructing weights of industry portfolio properly in STATA. I have panel data of market capitalization,...

    Started by Onlyvictory‎, 11-21-2012 10:57 AM
    • Replies: 6
    • Views: 900
    06-25-2014, 10:27 AM Go to last post
  37. Basic t-test question

    Hi everyone, I have to conduct a t-test for a proportion in Stata and was going to use the command prtest. However, this command calculates a z...

    Started by takemeaway‎, 06-25-2014 07:30 AM
    • Replies: 1
    • Views: 240
    06-25-2014, 08:22 AM Go to last post
  38. loop regression based on variable

    Dear statisticians, I'm trying to loop a regression on a panel data set. I have the following variables: iden1: cross sectional variable...

    Started by CPJR‎, 06-17-2014 03:17 PM
    forvalues, loops, panel data
    • Replies: 1
    • Views: 212
    06-22-2014, 05:47 AM Go to last post
  39. Modeling ARCH effects in Vector Autoregression

    Hi all, I have constructed a VAR(p) model with 3 time series in Stata. When I predict the residuals and run an AR(p) model (with p=1, 2, 3, and 4)...

    Started by claimed101‎, 06-21-2014 07:04 AM
    arch, heteroskedasticity, var
    • Replies: 0
    • Views: 242
    06-21-2014, 07:04 AM Go to last post
  40. Ratio as an independent variable

    Hi, I am planning to use ratio of the type of ownership as the independent variable in one of my Tobit models. I am considering three ratios;...

    Started by Fernando1981‎, 06-20-2014 12:56 AM
    • Replies: 0
    • Views: 198
    06-20-2014, 12:56 AM Go to last post
  41. How can I extract 10th occurrences in panel data Today

    Hi All I have panel data which consist of stock prices of 1000 stocks over 20 years. I want to get the stock price of the 1st & the 10th trading...

    Started by Sam J‎, 06-19-2014 01:31 AM
    • Replies: 1
    • Views: 175
    06-19-2014, 10:33 PM Go to last post
  42. Exclamation What is the stata command for two way repeated measures ANOVA??!!

    Hi :wave: I was hoping if anyone can clear up this minor confusion with regards to stata (im a beginner) and it would be great if someone can...

    Started by Emma121‎, 06-17-2014 03:57 AM
    anova, commands, repeated measure anova, stata, stata 12
    • Replies: 1
    • Views: 154
    06-19-2014, 07:08 AM Go to last post
  43. Margins with vce(unconditional)

    Hello Stats, In Stata I'm using the following logit-command: logit vary varx1 varx2 varx3 i.varx4 i.varx5, cluster(varx5) or the output shows...

    Started by lund_kasper‎, 06-19-2014 04:34 AM
    • Replies: 0
    • Views: 145
    06-19-2014, 04:34 AM Go to last post
  44. Looping in Stata

    Hi everyone, This is the problem I am dealing with. I have this data from the a book publishing site. It looks something like this: Author ...

    Started by sreten‎, 06-16-2014 10:56 AM
    • Replies: 2
    • Views: 231
    06-17-2014, 04:53 AM Go to last post
  45. Code for finding correlation between observations within separate categories

    Hi All, Let me provide an example of the problem I am working with (this is not the data I am actually dealing with, but it should make it easier...

    Started by Salohcin‎, 06-15-2014 09:32 AM
    • Replies: 0
    • Views: 202
    06-15-2014, 09:32 AM Go to last post
  46. Nonnumeric characters: "," and "%"

    The data on one of my variables is in percentage format with commas instead of dots. It seems like I need to get rid of them both. I try to destring,...

    Started by Eric_B‎, 06-14-2014 03:10 PM
    • Replies: 2
    • Views: 254
    06-15-2014, 02:00 AM Go to last post
  47. Stata output to Excel

    Is there a way to export Stata outputs into Excel? For example, log using Demo, replace text But instead of exporting the output in a text...

    Started by Marvin85‎, 06-13-2014 02:58 PM
    export, log, stata output
    • Replies: 1
    • Views: 196
    06-13-2014, 07:34 PM Go to last post
  48. Unit Root tests with panel data

    Hello all! For researchers etc. out there, is it correct to use a Dickey-Fuller Test to test for stationairty when you're using cross country...

    Started by seanyshuffler‎, 06-13-2014 08:29 AM
    • Replies: 1
    • Views: 185
    06-13-2014, 01:08 PM Go to last post
  49. Smile Stata Query - counting no. of obs - simple problem?

    Hi everyone, I am really struggling with the command/program required to solve the STATA problem below and I really hope someone is able to help...

    Started by kittubaba‎, 06-12-2014 09:09 AM
    • Replies: 0
    • Views: 184
    06-12-2014, 09:09 AM Go to last post
  50. Rewrite SAS code to STATA code!

    Can someone rewrite me SAS code to STATA code. (simple 5 lines sas code)

    Started by Vlajkony‎, 06-09-2014 03:00 PM
    • Replies: 6
    • Views: 273
    06-12-2014, 08:52 AM Go to last post
  51. Spatial autocorrelation

    Does anyone know how to use spatial autocorrelation for a single variable in STATA. In my case, for variable-marketable surplus of wheat, I need to...

    Started by nitish‎, 06-11-2014 03:25 AM
    • Replies: 0
    • Views: 289
    06-11-2014, 03:25 AM Go to last post
  52. Lightbulb problem with xtcsi and xtmg command

    Hi Everyone, I am trying cross sction depndence and slope homogenety test for my panel,when i use xtcd and xtcsd for testing cross-section...

    Started by eli ahmadpour‎, 06-10-2014 04:12 PM
    • Replies: 0
    • Views: 257
    06-10-2014, 04:12 PM Go to last post
  53. Dealing with Imputed data

    Hi guys! I was wondering could people give me a hand with some problems I'm encountering while working with panel data. I'm testing the effects a...

    Started by seanyshuffler‎, 06-10-2014 03:36 AM
    • Replies: 0
    • Views: 163
    06-10-2014, 03:36 AM Go to last post
  54. qreg with respect to the quantiles of the independent variable possible?

    hi, I'm using quantile regressions in Stata and was wondering, whether there is a way to run a qreg so, that it considers the quantiles of an...

    Started by Indigo‎, 06-09-2014 10:45 AM
    • Replies: 0
    • Views: 126
    06-09-2014, 10:45 AM Go to last post
  55. Question Interaction terms in logistic regression (help)

    Hi all, I'm in doubt with two models that I don't know if they are correct. I'm most interested in the second model that compares individuals...

    Started by Rafael‎, 06-06-2014 01:02 PM
    • Replies: 1
    • Views: 236
    06-06-2014, 01:07 PM Go to last post
  56. Buying computer for STATA12 project

    Hey all, I am a researcher working with large datasets (6-8 GB). I am looking to purchase a new computer mainly to handle this work. I am looking...

    Started by mzapf88‎, 06-05-2014 05:52 PM
    • Replies: 4
    • Views: 291
    06-06-2014, 02:49 AM Go to last post
  57. Ordinal variable difference between pre and post- age IV

    I have a self-efficacy scale ordinal 1 to 5. I ask this question in pre and post tests. I would like to know if age affect the change in...

    Started by Marvin85‎, 06-05-2014 10:27 AM
    ordinal, signrank
    • Replies: 3
    • Views: 177
    06-05-2014, 02:00 PM Go to last post
  58. How to list IDS that have multiple observations

    How do I list ids that have multiple observations Say I had Ids - some have multiple observations of pain scores at different days. I want to...

    Started by therookie‎, 06-05-2014 06:26 AM
    • Replies: 0
    • Views: 115
    06-05-2014, 06:26 AM Go to last post
  59. Beginner's question on replace command

    I have a string variable called Region. Right now, it's identical to another variable I have called Country. I want to change the Region column so...

    Started by solarium‎, 05-29-2014 01:25 AM
    • Replies: 3
    • Views: 242
    06-04-2014, 08:28 PM Go to last post
  60. Time fixed effects

    What is the interpretation of the coefficient of the year dummies (in a fixed effects model)? What do they tell me? Why are the negative? Is the...

    Started by Pvunderink‎, 06-04-2014 06:22 AM
    • Replies: 0
    • Views: 158
    06-04-2014, 06:22 AM Go to last post

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