Logistic regression, propensity score matching, or IPTW?

Hello, I would like to compare the "adjusted" mortality after surgery between two cohorts with very different sample sizes. The ...

Why can't we cluster on anything we like?

I often get error messages indicating that Stata doesn't like the variable that I have chosen to cluster on. Consider the following mode...

Writing a Loop

Dear Statalist Users, I have multiple txt files and I want to convert them into stata files so that I can append the data. This is the m...

Problem with reaching 1:n ratio with psmatch2 !

Hi everyone, I am trying to perform a 1:4 propensity score matching using the command psmatch2. After I run the code, the ratio of individ...

stata ttest significance

Hi everyone, I have the following dataset Code: * Example generated by -dataex-. To install: ssc install dataex clear input int NEWID...

Best command for cross-classified models

I'd like to fit a model with student and teacher random effects. The ID variables for students and teachers are stdntid and tchid. There...

Asdoc "conformability error"

Dear Statalist, I am getting an error message when running the asdoc command. The first code works fine, but the second code returns: Cod...

mixed vs. xtreg, re

Here are four ways to estimate the same model (I think): Code: xtreg absent ib(2).classtype ib("k").gradenum i.schid, re xtreg...

Writing a Loop

Dear Statalist Users, I have multiple txt files and I want to convert them into stata files so that I can append the data. This is the m...

Operations over lags

Hello, I need to do some operations over all the lags up to the current value, but the loop I wrote takes forever, could you please tell m...

Force Merge

Hi, I am trying to merge household-level data for two different rounds but I keep on getting an error. I have attached the STATA code and th...

Interpreting interaction

Dear Statalist, I am running the following regression with an interaction between a categorical education variable and continuous variable...

Points of mass in running variable - RD

Dear all, I am struggling with my RD specification. I am using the rdrobust package from SSC and when I try to compute the optimal bandwid...

ppmlhdfe with disaggregated data: exporter,importer,sector fiexed effects

Hello, I am running a gravity model. My data looks something like this Code: use "http://fmwww.bc.edu/RePEc/bocode/e/EXAMPLE_TRADE...

Fine and Gray with Censoring

When I produce cumulative incidence curves (CIC) for the Fine and Gray model using stcrreg and stcurve , I noticed that the estimated plate...

Interactions between sex and country of birth : do I also have to include interactions between control variables and sex?

Dear STATA community, This is my first post and I hope that you can help me with my problem. In a nutshell, I run a regression to estimat...

Complete Time Series

Hello everyone, I'm wondering how to 'insert' empty values in my panel data. My data looks as follows: Array For each b_id...

Creating a new variable differentiated by gender

Hi Statalist. I want to be able to test if there is a difference in the effect of level of education by gender. Here's my draft code. ...

Using an interaction between a categorical and a continuous interaction where the base category is highly informative

Dear Statalist, Sorry if my question is too general for this forum. I hope it is okay. I am looking at the impact of trade on the return...

ivprobit and cmp ivprobit

Hi. I am using an individual-based survey and I am trying to estimate the impact of migration and remittances on child education in Egypt. T...

Merging datasets code issue

Hi all! I can't figure out a certain line of code. I'd like to merge two data sets. The master dataset looks as follows: Array ...

Replacing "NA" with missing

I'm super new to using Stata and could really use some help! I have imported a csv file from R into Stata and am not sure if there is a ...

eintreg

Hi, I am using eintreg for interval regression with sample selection I would like to know the number of points used to do the numerical in...

p values

Hi, We are comparing the clinical characteristics of infants who received Octreotide for chylothorax versus those who did not. I used Wilco...

how to backup files better

Hello！ W hen I use stata to clean data, I always want to keep track of every step I take so that I can use backup file to get every dta whi...

Centering on Mean - Interaction of 2 continous variables using the first difference estimator

Hi, My research project is looking at the impact of financial development (bank development - proxied by private credit& stock market ...

Dropping observations based on multiple conditions

Hi Everyone, Thanks for taking the time to read my query. I currently am cleaning a very big dataset (52 variables, 82284 observations) f...

define after a certain range

Hello, I want to define a variable conditioned after a certain range of another variable. For instance, each id has a binary variable &#...

Error in mi impute chained (logit)

Hello, I am trying to run an mi impute chained using (logit) and I get the following error message when I try to impute medications which ...

Obtaining the Spatially Weighted Regressors Using spregress

Hi Everyone: I'm looking for a simple way to obtain the regressors W*X when using spregress, where W is the chosen spatial weighting m...

Simple sum within the same variable

hello, this may be a very simple question but is it possible to create a variable that simply sums consecutive numbers within the same varia...

Using GEE for repeated cross sectional, nested data

I'm conducting an impact evaluation for a school level program and interested in evaluating if there is a dose response relationship bet...

Change degrees of freedom after estimating an OLS regression with sem

Dear Stata experts, I recently learned how to change the degrees of freedom in the regress command using the dof() option (Thanks Trent Mi...

Help using loop to replace values in several variables with conditions

Hello, Can anyone suggest a way to use a loop to replace values in several variables with conditions? Here is the situation. I created sev...

Data in Stata format for Card & Krueger

Does anyone know where i can get the data of the famous Card& Krueger, 1994. AER paper on minimum wages. " Minimum Wages and Empl...

Coefplot with note() option

Dear Ladies and Gentlemen, I would like to have a longer note comment under my graphs stretching over two lines. I run the following comm...

Create Dataset in Stata using a Loop

I'm having trouble finding guidance on this. I want to create a dataset that has a variable called "location" and contains the...

meta regression missing data

Hi everybody, I have to do a meta-analysis. The aim of this meta-analysis (37 studies) is THE prevalence of bipolar disorder in an ASD (AU...

Transforming survey results to numerical codes appropiately (Encoding help)

Stata and Stata Forum Beginner here. Situation: Using Limesurvey data for a health-related QOL study. This has questions where the respons...

ologit in favour of parsimoniousness despite violated parallel lines?

Dear Statalists, I could use your input on the following 😊 My case: I am testing the influence of a factor variable (4 different count...

Unexpected coefficients in GMM sys

Hello everyone, I'm new with GMM, I'm using this estimator because I found it's the most suitable for my case. I have a panel d...

Need some help on a loop

Hello dears all. I merged two datasets. The first dataset contained the listing of households' members. In this dataset, i had the ag...

Unable to read .dta file through do file - works fine otherwise

Hello! I am working on a do file alongside a colleague but its commands will not load successfully and it generates an r(601) error. The...

Add a vertical line?

Dear all, I generate a data set and estimate an interaction model as follows. Code: clear set seed 123 set obs 1000 gen x = runiform() ge...

Import mulitple sas7bdat files into stata with a loop?

Hello I have 524 sas files I would like to import as dta files, ex. bef201012.sas7bdat bef201112.sas7bdat bef201212.sas7bdat faik2010...

test for significant difference in number of children between 2 groups

Hi there, I've been searching for a few hours on the internet but right now I can't see the wood for the trees. I want to test i...

95% Confidence Interval for relative concentration index

Hello I would like to calculate 95% CI of relative concentration index. However, I could not find a stata command for this. Could anyone k...

Loop of different files using capture

Hello Statalisters I am running a loop over several files, like: Code: local originals "/Users/onedrive/stata/files" // Defi...

Leave out 90th percentile

I am using a census dataset which has these following variables: county industry income I know how to calculate the normal one: col...

Variable label in generate?

Dear All, I'd like to confirm whether there is any syntax that would allow me to prescribe variable labels in the generate 's synt...

Can I do a OLS Regression if the distribution of my DV is like this?

The dependent variable is the proportion of the ** time / *** time. Because this is a proportion, the values range from 0 to 1. As the his...

xtwest command

i am trying to apply the xtwest command i get an error i have one dependent variable and 5 independent variables t=28 n=5 xtwest net fdi ...

How to save a Kaplan-Meier survival point estimate to a local macro?

Hello STATA Community, I am currently using version 15.1 of STATA. I have some straightforward survival time data, (time in years, censo...

Importing oddly formatted txt data into stata

Hi statalist, I am dealing with precinct by precinct voting results from counties in Texas. My goal is to record elections results (how many...

Iterations in logistic regression

Is there any work on what affects the number of iterations required to achieve convergence in logistic regression -- number of X variables, ...

Finding Most Common String Values Across Variables

Hi all: I am trying to find the most common string values across variables. While I work in criminal justice data, I can't share that ...

Interpretation of sdtest

Hi everyone, I am using the sdtest command to evaluate variances in two groupes. But in Stata's output, I'm have problems with th...

Help producing line graph

Hi all, I have somewhat of embarrassing question. I am trying to make a line graph that displays what percentage of the observations (or i...

The Hausman test for endogeneity

I have read in a paper that we can use Hausman test for endogeneity. and the authors mentioned that we can use error term as follows: HTML...

Using analytical weight in STATA's mixed effects model

I have a learning assessment dataset of over 60 countries and 2-5 years/waves. While countries are the same in all years, individuals (stude...

Fixed effects and cluster error in gravity model

Dear all. I need your help. I am working in a gravity model that pretends to estimate Colombian exports to 136 partners from 2005 to 2018 ...