Ranking observations based*on other variables.
Dear all, I have data on rating performed by students. For instance, each student had to rate the height of five bars. I would like to re-code my bar heights variable such that the bars that received...
View ArticleImpossible values in Stata example Dataset
Looking for an example dataset to introduce Stata to some students, I've found the highschool.dta (or multistage.dta) dataset in the examples available online at Stata Press (...
View ArticleA model to compare two groups over multiple time points?
I am looking at the differences in my dependent variable caused by an intervention over time. I have three time points - one at time of intervention, a medium time point and final one. I want to...
View ArticlePlease help with pred values plotting
Hello Brainstrust. Sorry this is a repost. I've just read I have to use my real name. Also I have read the manual and searched google for the answer but no joy. Please bear with me. I'm a real beginner...
View ArticleSimulating new data with an available small data
Hi everyone, need some help with simulating data. I have a small data with 10 numbers of a given variable and need to simulate 100 new numbers that will be similar to the 10 original (which are not...
View ArticleNHANESIII data in Stata
Unlike continuous NHANES (1999-2016), NHANESIII survey and linked mortality follow-up data are not available at cdc.gov as SAS transport files (easily read into Stata).There are several steps to...
View ArticleBeta estimation using a subset of data
Hi! I'd like to calculate beta using 5 years worth of quarterly data. At the end of each year t, beta is estimated using quarterly data from 5-year period covering year t-4 through t. Please find...
View ArticleCombine regression coefficients in one table
Hi! I'm trying to rebuild the following regression model, but unfortunately I'm having some problems. What the regression tries to identify is if a change in regulation has influenced market quality....
View Articleesttab, @span and the additional column introduced by...
Hi, I'm printing my regression tables using esttab and TeX. mgroups() allows me to create column headers combining multiple columns. In particular when I use Code: prefix(\multicolumn{@span}{c}{)...
View ArticleInstrumental Variables and Endogeneity
If researchers have difficulty in finding instrumental variables, and the instrument's strength plays a crucial role in ensuring bias resulting from endogeneity is mitigated, could you just create a...
View Articlemean command with pweight & vce() & over () options
Hello, I am trying to use mean command with pweight & vce() & over() options, but I get an error message. "factor variables and time-series operators not allowed" Code: mean he_bmi...
View ArticleRegular expression operators
Dear Statalisters, Do you know if Stata or Mata supports POSIX character cases or Perl‐Style meta-characters in its regular expression functions? A Stata FAQ acknowledges these operators but it is...
View ArticleOaxaca command with svy option / decomposition analysis
Hello, I am doing decomposition analysis with a survey data, and I am stuck. I need to use svy to estimate numbers at the population level, so I use the below code. Code: use knhanes_0514, clear svyset...
View ArticleInvalid syntax and no table displayed in Weave
Dear all: Could you please have a look at these codes below to see what is wrong? This is an example of doing a simple regression and exporting the results into HTML and PDF files with Weaver in Stata...
View ArticleControlling Connected Graph Tick Location for Monthly Data with Yearly Label
Hopefully a simple question re: a connected line graph. I've got monthly data for one Y variable from May 2013 to July 2016, and I would like to have the x axis have ticks indicating the end/beginning...
View ArticlePurging observations by subgroup
I'm sure there is a solution already on the forum about this but I wasn't able to find anything with my searches... I have a dataset of lab values for which I have generated a % change since baseline...
View ArticleData manipulation question
I'm having problem with data manipulation, but I don't know how to start. I'm using STATA 12.0 for MAC. My dataset looks like this: year firm_id investor_id gamma beta zeta sic code 2014 1 1 .1 .21 .3...
View ArticleEntering a P value on a forest plot
I am inputing results from studies onto a forest plot, how do I obtain the overall P value to enter into the tool? I would be grateful . Thank you
View Articlelimit y axis after using adjustrcspline
Dear Statalister, I made a model containing two restricted cubic splines and 2 dichotomous variables using linear regression (commad regress). * example of my model regress logkpa i.wave2 alcsp*...
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