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Forum: Stata

Stata usage and programming, Stata help

  1. 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: 159
    Yesterday, 12:34 PM Go to last post
  2. 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: 191
    12-18-2014, 03:40 AM Go to last post
  3. 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: 70
    12-17-2014, 04:27 AM Go to last post
  4. 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: 227
    12-15-2014, 06:49 PM Go to last post
  5. 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: 234
    12-15-2014, 06:46 PM Go to last post
  6. 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: 140
    12-13-2014, 06:08 PM Go to last post
  7. 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: 132
    12-11-2014, 12:54 PM Go to last post
  8. 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: 186
    12-08-2014, 10:32 PM Go to last post
  9. 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: 194
    12-06-2014, 11:23 PM Go to last post
  10. 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: 127
    12-06-2014, 08:20 PM Go to last post
  11. 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: 181
    12-03-2014, 05:40 PM Go to last post
  12. 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: 211
    12-02-2014, 10:32 AM Go to last post
  13. 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: 283
    11-30-2014, 03:27 PM Go to last post
  14. 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: 313
    11-29-2014, 12:34 AM Go to last post
  15. 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: 146
    11-28-2014, 10:18 PM Go to last post
  16. 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: 1,786
    11-28-2014, 12:39 AM Go to last post
  17. !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: 250
    11-25-2014, 04:00 AM Go to last post
  18. 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: 285
    11-24-2014, 03:26 PM Go to last post
  19. 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: 229
    11-21-2014, 06:45 AM Go to last post
  20. 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: 487
    11-20-2014, 07:20 AM Go to last post
  21. 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: 209
    11-19-2014, 11:05 AM Go to last post
  22. 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: 243
    11-17-2014, 03:54 AM Go to last post
  23. 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: 215
    11-16-2014, 04:48 PM Go to last post
  24. Using bysort to drop missing data by group

    Hi, I am new to longitudinal data and could really use some help! I have a data set where some participants are missing variable x data. How can I...

    Started by alxchang‎, 11-13-2014 09:37 AM
    • Replies: 1
    • Views: 172
    11-14-2014, 05:58 AM Go to last post
  25. Heteroskedasticity & Autocorrelation in a random panel data

    Dear communty, I have the question regarding the choice of an appropriate model for panel data with serial autocorrelation and heteroskedasticity...

    Started by funtik‎, 11-13-2014 08:00 PM
    • Replies: 0
    • Views: 165
    11-13-2014, 08:00 PM Go to last post
  26. Including categorical interactions in mi impute passively

    Version: Stata MP 13.0 I wish to impute something like this... mi register imputed a b c d e f mi impute chained (reg, include((d##e)) a b c...

    Started by Mel42‎, 11-12-2014 07:55 AM
    categorical interaction, mi impute
    • Replies: 0
    • Views: 166
    11-12-2014, 07:55 AM Go to last post
  27. Question Solving a system of non-linear equations for a dataset

    I have to find a solution (av, asigma) for the following system if equation: 0 = av*normal( ln(av/debt)+(r+asigma^2/2)*t)/(asigma*sqrt(t) )...

    Started by Finsternis‎, 11-08-2014 12:03 PM
    • Replies: 0
    • Views: 242
    11-08-2014, 12:03 PM Go to last post
  28. create a new variable with data out if another variable under certain conditions

    hello everybody! i want to create a new variable (t_bip1), which should be filled with data from t_. As you can see in the screenshot, i need all t_...

    Started by Lima‎, 11-08-2014 06:09 AM
    • Replies: 0
    • Views: 214
    11-08-2014, 06:09 AM Go to last post
  29. Relating variables within home group

    Hi, I've got a database with information about several different families related to child labor and I need to create variables for the children...

    Started by Vicheu‎, 11-03-2014 11:06 PM
    • Replies: 3
    • Views: 298
    11-07-2014, 03:30 AM Go to last post
  30. Variance decomposition

    Hi I have this two-way fixed effects model: xi:xtreg dep ivar1 ivar2 ivar3 ivar4 i.year,fe vce(robust) I need the variance decomposition...

    Started by stata3‎, 11-07-2014 12:57 AM
    • Replies: 0
    • Views: 128
    11-07-2014, 12:57 AM Go to last post
  31. Time Series Line Plot with Dummy Variable by period

    Hi guys, I have a question regarding how to graph dummy variables. I have a dataset consisting of different firms and different firm years. I have...

    Started by Rookery‎, 10-31-2014 12:18 PM
    • Replies: 4
    • Views: 326
    11-03-2014, 04:02 AM Go to last post
  32. bilateral exchange rate volatility

    I am trying to estimate panel gravity model and need exchange rate volatility between country i and j but i don't know how to do it in Stata !!!...

    Started by SALI‎, 11-02-2014 12:29 PM
    • Replies: 0
    • Views: 140
    11-02-2014, 12:29 PM Go to last post
  33. Import fixed column data help

    Hi all, I am having trouble structuring my data so that I can import it into Stata using "infix". I cannot delimit my data as there are blanks...

    Started by alexalexalex‎, 11-02-2014 09:13 AM
    blanks, data management, import data, stata
    • Replies: 0
    • Views: 147
    11-02-2014, 09:13 AM Go to last post
  34. Line chart Stata

    Hi friends, I need to create a line chart to inform which of our grantees are collecting more surveys. I need a line chart of the total number of...

    Started by Marvin85‎, 10-31-2014 11:54 AM
    line chart
    • Replies: 1
    • Views: 204
    10-31-2014, 03:25 PM Go to last post
  35. Stata help! trying to make any specification for probit

    I am trying to see the relationship between job promotion and several x variables. I recoded Y to promo as 0 and 1 and with x variables I ran...

    Started by boysgd‎, 10-29-2014 02:52 PM
    probit
    • Replies: 1
    • Views: 201
    10-30-2014, 07:15 AM Go to last post
  36. "Advanced" use of esttab: delete/insert rules

    I am trying to format some tables that are to be published in the American Economic Review. I usually export tables with esttab in tex code and then...

    Started by luciano‎, 03-22-2012 11:11 AM
    • Replies: 3
    • Views: 2,137
    10-29-2014, 07:00 AM Go to last post
  37. create a time period

    Hello everybody! I have values for prices for each year (price_1998, price_1999 etc), the avarage prices(aprice_1998, aprice_1999..), the marginal...

    Started by Lima‎, 10-28-2014 01:52 PM
    reshape
    • Replies: 1
    • Views: 225
    10-29-2014, 04:53 AM Go to last post
  38. If statement braces not producing an output

    Hello and thanks for your help, I am fairly new to Stata and am having issues trying to get the following if statement to run. When I run the "if...

    Started by S.Triggs‎, 10-16-2014 12:04 AM
    • Replies: 5
    • Views: 469
    10-21-2014, 03:47 PM Go to last post
  39. regression with Schwert(1989) method.

    I want to genearting Volatility using Schwert(1989) method. I attach equation picture. and R(t) mean IPS rate. D mean seasonal dummy variable. ...

    Started by wawataiji‎, 10-21-2014 11:38 AM
    • Replies: 0
    • Views: 200
    10-21-2014, 11:38 AM Go to last post
  40. SOS: generate a sub-sample with specific criteria (tricky)

    Hi guys I have a problem and I don't Know how to solve it. I have a sample and I would like to create a sub-sample with some specific...

    Started by zaksotiris‎, 10-21-2014 09:20 AM
    • Replies: 0
    • Views: 189
    10-21-2014, 09:20 AM Go to last post
  41. Dropping duplicates with date-specific properties

    Hey guys. I had a question today that I had no idea how to solve. It basically revolves around removing duplicates from a dataset with close to...

    Started by starpen‎, 09-29-2014 06:34 AM
    drop duplicates, duplicated individuals
    • Replies: 2
    • Views: 345
    10-14-2014, 12:13 AM Go to last post
  42. Calculate age in STATA

    I have DOB in MM/DD/YYYY format. The first problem is that some DOBs have a MM/D/YYYY format if the day is a single digit number. The second problem...

    Started by oncearunner‎, 10-07-2014 10:46 AM
    • Replies: 2
    • Views: 416
    10-13-2014, 09:45 PM Go to last post
  43. HELP! Coefplot: how to display only certain variables?

    Hi everyone, I want to use coefplot just to display the coefficients of two categorical variables holding for all the others after a reg. I...

    Started by Filippotto‎, 09-30-2014 04:15 AM
    coefficient, coefplot, regression, stata, vertical graph
    • Replies: 0
    • Views: 334
    09-30-2014, 04:15 AM Go to last post
  44. I'm nesting 3 loops worngly. Can you helmp me?

    Hi. I hope you can find what i'm doing wrong. I'm creating a matrix which is evaluating every cross for two variables: varc(from 1 to 17) and...

    Started by jfca283‎, 09-29-2014 03:55 PM
    • Replies: 0
    • Views: 276
    09-29-2014, 03:55 PM Go to last post
  45. Label multiple variables Foreach

    I have a series of multiple response variables. var8a var8b var8c; var9a var9b var9c; etc I would like to label my "a" variables *(var8a and var9a)...

    Started by Marvin85‎, 04-25-2014 10:47 AM
    foreach, variable label
    • Replies: 6
    • Views: 1,036
    09-24-2014, 05:49 PM Go to last post
  46. kappci command in Stata 11.0 -

    I am using the kappci command that I installed from the kaputil to determine the confidence interval between two unique raters. When I use nominal...

    Started by helpwithstats‎, 07-07-2011 02:59 PM
    • Replies: 3
    • Views: 1,414
    09-24-2014, 10:02 AM Go to last post
  47. Merging PISA waves in Stata

    I am running into trouble trying to merge multiple PISA waves into one Stata file for running some hierarchical models. So far, I have combined the...

    Started by aliciacroft‎, 09-22-2014 04:26 PM
    merge, multiple datasets, pisa, stata
    • Replies: 3
    • Views: 303
    09-23-2014, 01:18 PM Go to last post
  48. Replicating values of a variable for additional observations

    Hi all, I have a question and would be grateful if you could answer: I have panel data from 2000 to 2012. One variable however, ‘var_a’ runs only...

    Started by diesel‎, 09-23-2014 10:33 AM
    • Replies: 0
    • Views: 158
    09-23-2014, 10:33 AM Go to last post
  49. variables being dropped from difference gmm

    I'm working with panel data, using the command xtabond2 for Arellano Bond estimator. When I run the command, most of my explanatory variables are...

    Started by jsaldain‎, 09-22-2014 07:33 AM
    • Replies: 1
    • Views: 230
    09-22-2014, 08:34 AM Go to last post
  50. Requesting help with creating a semi-complex variable

    My datafile looks something like this: COUNTRY REGION YEAR GDP Albania ECA 1995 5 Albania ECA...

    Started by solarium‎, 09-21-2014 10:42 PM
    • Replies: 1
    • Views: 217
    09-21-2014, 11:34 PM Go to last post
  51. Business Calendars/ STATA 11

    Hi all; I use STATA 11 and i would like to create my own business calendar. I have daily data starts from 05/01/2004 to 25/07/2014. i would be...

    Started by Nour‎, 09-14-2014 06:17 AM
    • Replies: 1
    • Views: 289
    09-21-2014, 11:29 PM Go to last post
  52. Create tables /// export tab results directly to excel

    I generating a descriptive report for my boss ( that is just frequency tables). I tab everything in stata and the copy as a table and paste it excel....

    Started by Marvin85‎, 09-03-2014 10:46 AM
    • Replies: 7
    • Views: 571
    09-16-2014, 09:16 AM Go to last post
  53. Transformation of multiparty partnerships into dyadic relationships

    Dear Stata gurus, I'd like to ask for your help once more. The problem is as follows: I have data on multiparty partnerships structured in the...

    Started by Slavutich‎, 09-13-2014 07:04 PM
    • Replies: 2
    • Views: 271
    09-15-2014, 04:41 AM Go to last post
  54. statistical tests for a special period of time

    Hi, I need to run statistical tests for a special period of time, not for all period how can i do that? Thanks in advance

    Started by Nour‎, 09-12-2014 06:41 AM
    • Replies: 1
    • Views: 213
    09-14-2014, 08:18 PM Go to last post
  55. Help with matrix and loop

    Hi I'm trying to generate a matrix with the following code matrix A=J(17,8,0) forval i=1/17 { forval j=0/7 { quietly summarize cise if...

    Started by jfca283‎, 09-02-2014 12:50 PM
    • Replies: 3
    • Views: 319
    09-14-2014, 01:09 PM Go to last post
  56. Need help with -keep-/-drop- function in Stata

    Hello everybody, I'd like to ask for your help with -keep-/-drop- function in Stata. The problem is as follows: suppose I have a column, called...

    Started by Slavutich‎, 09-10-2014 04:35 PM
    • Replies: 2
    • Views: 330
    09-12-2014, 07:43 AM Go to last post
  57. Export three way table to excel o csv?

    Hi I hope you can help me. I need to export multiple tables of this kind table varx1 sex education , c(mean ing_t_p) center row col...

    Started by jfca283‎, 09-09-2014 05:31 PM
    • Replies: 1
    • Views: 265
    09-10-2014, 06:01 AM Go to last post
  58. ML est. with oprobit per Huasman et al in Stata 13?

    Hi. I am using Stata IC 10 and having difficulty implementing the ml estimation to determine sensitivity to misclassification in limited dependent...

    Started by JFalcon‎, 09-09-2014 12:19 PM
    misclassification, ologit, oprobit, stata 13, stata10
    • Replies: 1
    • Views: 263
    09-09-2014, 04:24 PM Go to last post
  59. Regression lines parallelism test in STATA

    Hello everybody, Please help me with the following issues. ANCOVA rests on the assumption that the regression lines are parallel, or that...

    Started by kiton‎, 09-08-2014 10:13 PM
    • Replies: 6
    • Views: 306
    09-09-2014, 11:53 AM Go to last post
  60. Comparing proportions in a subgroup to proportions in the overall population

    I am trying to compare the proportion of patients in my subgroup with the outcome of interest to the proportion of patients in the overall population...

    Started by apandya‎, 09-09-2014 12:41 AM
    proportion test, stata, subgroup
    • Replies: 3
    • Views: 224
    09-09-2014, 11:32 AM Go to last post

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