Computing indices from panel data
I have a panel Data from 1995 to 2021 for 14 products. I want to normalize var1 by its value in 2008 across time. How can I do that?
Mathematical Optimization in Stata: LP and MILP
Here's a 2013 presentation, posted on https://ideas.repec.org , describing two user-developed commands that do mathematical optimizatio...
interaction terms in stata (without main effect)
Hi, I am little confuse about the way stata handle and designate interaction variables. To me (and to all textbooks), an interaction varia...
Two time-point measure, subgroups
Hi Statalist, I hope for some ideas - because I am stuck. I have dyadic (child & caregiver) data with two time points (pre- and post-i...
metaprop: error on using cimethod(exact)
Hi, I have been getting error as below on using cimethod(exact). But with cimethod(score) there is no such error. How do I resolve this iss...
ci2 interferes with esttab
Hello, After hours of troubleshooting code that used to work and stopped doing so, I figured out that the problem was introduced by my new...
logit and mixed regression
Hello together, I am currently working on my Stata code for my bachelor thesis. I’m quite a beginner and would be super grateful for so...
Distinct occurrences of variable value within each individual in a panel
The server I’m working on does not allow me to install -dataex-, so I apologize for the lack of standardized example! I’m working with a p...
Cox proportional test
my proportional-hazard assumption test based on Global test derived from Schoenfeld residuals was significant -----------------------------...
Relative risk ratios and their CIs from teffects psmatch
I am trying to work out relative risk ratios from the ATET result on a binary outcome in teffects psmatch. I'd like to present the resul...
Replace a observation by a missing value
I would like to know the command to replace the observations where it is written "refusal" and "don´t know" in the varia...
Count number of individuals that gave an answer in a questionnarie
I would like to know the code to know the number of individuals (each individuak is identified by the number "pidp") that answer ...
Specifying a 'fill in the blank' variable in a loop
Hello, I'm sure this is a function but I'm having trouble finding it -- I'm trying to make a loop that behaves differently fo...
Loop mixed model over a least of predictors and store the coefficients and P values
Hi, I want to loop a mixed model over a list of predictors (fixed effects) and store the coefficients and P values in Stata v. 17. Code...
preparing data for propensity score match
Dear All, I want to analyze if the gain in public health insurance due to this policy (Medicaid expansion) has led poor individuals to inc...
Matching Actions to Years
I have to different databases. Database 1 has executive actions in specific years, but this is not continuous (there may be an executive act...
generate a value indicating how many time a situation happens before the specific date
Hello everyone in the community! Sorry to have some problems with the same data again , thanks again, in advance, for all your help! This...
rename variables
I am poor at Stata coding. I would like to rename from "logind1-logind84" to " logcoefstandind101, logcoefstandind102, logc...
Kaplan Meier survival description output - no median result
hi all, I am using Stat 16 on Mac. I am calculating Kaplan Meier survival curves for 2 groups of patients who do or do not have a genetic ...
Interval censored survival using aggregate data
Hello, I've got data on vials of drosophila infected with a virus. Then at each time point, I record how many are still alive. I would...
Changing a binary policy variable shifting it to next year for repeated cross section data
I've enlisted policy as a binary variable which I need to take 1 year forward. Like in my data for county 1003 the policy takes value 1...
Selecting a subset of ordered variables without typing them manually
Dear all, I am trying to execute a fairly simple operation: Code: egen duration_desk=rowtotal(t_*_pagesubmit) The issue I have is th...
A numerical representation of distance from a regression line?
Hello Am a novice Stata user/ statistician. I have created a two way scatter of aggregated travel distances (y axis) and passenger counts ...
Creating lagged variables with pooled cross sectional data
I am working with a dataset that contains student grade observations in a variety of subjects, in different schools, over ten years. This is...
Interpreting Interaction Term Coefficients
Dear Stata Users, I intend to study the relationship between ethnicity and COVID-19 on income. I conduct a log-linear regression with th...
HELP! xtline producing different graphs each run
Please help! I have a simple, balanced longitudinal data set. I xtset the data and then run xtline. Each time I run xtline I am getting a ...
Spilt variable and fill in numeric terms in the string
Dear Statalist, I have a variable called Name which looks like below. I would like to spilt Name into Name1 and Name2 by '/' or ...
Eliminating leading blanks from a string
Hi all, It seems there are leading blanks for a string variable state in 2 out of 5 rounds of data sets I'm working with. Due to these...
De-trending Panel Data
Hi everyone, I need help with detrending panel data. I have a panel of firm observations across years and industries. I want to detrend th...
How can I get gr_edit to refer to specific graphs when multiple graphs are open in the graph window?
I'm using a user-created command (-synth2-) that generates multiple graphs as outputs. I want to be able to edit these graphs with code,...
What components should I pay attention to when buying a new laptop for Stata?
Hello Statalisters, I don't know if I'm allowed to post this thread as it is not related to Stata per se but to the best ways to u...
max # of variables in Cochran's Q test?
Hello- I am trying to evaluate multiple choice (non-exclusive) binary questions. Ex: on a survey, a participant can choose "yes" b...
Abnormal return for everday in a year
Good day everybody, I am new to Stata, and came up with an issue regarding the event study. I use the command from Princeton to calculate ...
Logistic Regression Output with Factor Variable i.Year - Issues with Interpretation
Hi all! I’m having issues interpreting the coefficients in my regression output. My model has a dichotomous dependent variable: Education ...
spmap error
Hi, I am learning how to create maps in Stata using spmap. Was trying out the examples using help spmap. But Stata is throwing an error t...
difficult to find the problem in MLE coding
Hello everyone, this is the code i am writing to estimate MLE estimates. while writing this program i am trying to check this program by ML ...
Clustering with imputation
I am using a dataset that uses a school-based sampling design, and thus I want to cluster with school id in my modeling. However, I'm al...
Using the coefplot command to plot odds ratios with p-values in multiple imputation estimations – potential bug to fix!
Dear Ben Jann , I was trying to plot odds ratios of mixed-effects logistic models of the association of four sexual risk-taking behaviours...
T-Test Using Three Groups
I am trying to do t-test where I have three groups (AIC, GIC, Others) - accordingly I created a variable (Test1) which is equal to 1 if AIC ...
Creating a Dummy variable (Time variant )
Dear All, 1. I want to create a Dummy Variable ( Health Status of Indivuduals) which is either yes or no from INSURCY2 . if it yes i want...
Help trying to determine an Asymmetric effect for dummy variables in a Linear Random Effects Model
Hello this is my first post here. So I am making a model to try and show the asymmetric effect in my independent dummy variables but with ...
Reshape wide with no time/order variable
Hello. I am working with a dataset that has multiple observations for most of the identifiers labeled study_id. I would like to reshape wide...
Coefplot - multiple models with different dependent variables
All, I am running multiple regressions with the same independent variable and 29 different dependent variable, and then running these same m...
covariates and distal outcomes in a latent class model
Hi Statalist Is there a way to implement the 3-step Latent Class Analysis (to include the covariates and distal outcomes in the model) in s...
ivreg2 - despite using partial option I get full rank error
In a multiple instrument regression using ivreg2 with gmm2s option I'm using partial. Despite using partial option, I get the following ...
optimization with STATA
I am unfamiliar with STATA programming, and I am trying to program some very rudimentary optimization problems. Suppose I have two variabl...
Transform a table: making options as variable
Dear all, I have this type of table: ID Date Culture ID Culture type Sample result 1 1 Jan 2022 001 MGIT Positive 1 1 Ja...
Assuming ICC
Hello everyone, This is my first post here. I need icc for power calculation. I have outcome variables test scores and student's effort ...
generate t-stat
How can we modify this code to generate t-stat of the means instead of standard deviation (sd), and also for 4*4 sorts. Code: frame crea...
How to store p-value and CI in a new variable in prais-winsten regression?
Hi! I'm new to Stata! I have a database model as shown below (hypothetical data). When running Prais-winsten regression, I would like ...
spatial weight matrix
Hello, As part of my research, I want to build a spatial weight matrix. I want a variable that shows the average GVC of each of the contigu...
Post-estimation tests or heteroskedasticity check to confirm normality of the residuals?
Hi Stata users, I'd like to ask for your help. I read STATA manual pdf on post-estimation for mixed-effects linear regression model, h...
what is the base for -collapse- percent statistic with by()?
The -collapse- command ( https://www.stata.com/manuals/dcollapse.pdf ) has a -percent- statistic that (according to the documentation) shows...
Correlating random effects to study interhospital variation
Hi All, Using data from ~2000 hospitals, I have identified patients who underwent 1 of 3 operations (type A, B, C). I would like to explor...
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