Sample Selection Bias in survey-based studies
Dear experts, in my previous post I explained my research proposal a little more in detail. Since I have evaluate certain firm resources upon firm performance, I find a "standard" OLS regression...
View ArticleRegression with continuous dependent variable with ordinal independent variables
Hello, Given a dependent continuous variable and multiple independent ordinal variables (such as from a likert scale), how do I fit a regression model? I have seen a similar forum for R but I am not...
View ArticleExporting variable names and corresponding labels
Hey, Is there a way in STATA to export variable names and corresponding labels? I tried a few things with the "Export" and putexcel options and am not getting the right output. Any help would be...
View ArticleTrying to use foreach and if to define a local
Hi Stata users I now have three days of experience with Stata and I really like the program so far. I have now run into a problem that I can't figure out how to solve, and I'm hoping one of you can...
View Articlerunning post-estimation commands on stored models
Hi there I have stored a number of model estimates into Stata's memory: streg i.var1 i.var2 i.var3 i.var4, d(exp) est store A streg i.var1 var2 var3 i.var4, d(exp) est store B etc... I want to run the...
View ArticleEndogenous count variable
Consider two different models. (1) DV of a duration (a length of time in minutes) (2) DV is a frequency (a count) Their regressors are: (1) volume1 volume2 and countR, where countR is endogenous (2)...
View ArticleSumming across numerous variables if observation equals a specific value
Hey! I have 9 different variables that I want to sum up. But I only want to sum the 1's. I tried: egen new_varname = rowtotal(var1-var9) if var1-var9==1 But that is giving me missing values since not...
View Articlerecoding sequence of variables to create total score (Griffiths Mental...
Hi! I need to recode some developmental data from a scale called Griffiths Mental Development Scales for over 400 children. Each subscale includes in 90+ items, and the database is at the item level....
View ArticleHow to open a ".mlib" files with Stata?
Dear all, I installed an online Stata code (mergersim) in Stata 11. The program consists several files which were installed in C:\ado\plus\m and C:\ado\plus\l. One of the files is a ".mlib" file. I'm...
View ArticleRegressors and Hausman test
Hello everybody, I would really appreciate your help. I estimated a model with OLS, however two variables (attendance at lectures and attendance at seminars) were suspected of being endogenous....
View Articleestimate weighted cross-classified models
Dear all, Is the function xtmixed able to incorporate sampling weight to estimate cross-classified models? If it is able to, could you kindly direct me to the source? Thanks. Ling
View ArticleComparing Characteristics of Ads in Two Different Years
Hello! Many thanks in advance for any help. I am working on a thesis where I am comparing characteristics of ads in 1975 and 2015. I am looking at characteristics such as "Woman has Utilitarian Grip"...
View Article2-way cluster using logit2 by Peterson - way to get marginal effects?
My question is similar to one that was posted a while back but unanswered: http://www.stata.com/statalist/archi.../msg00196.html I am using the logit2 ado file by Peterson (at...
View Articleregress the stock returns on a constant
Hi guys, I am hoping to get some help. I have a list of 20 companies' stock returns over the last 12 months and I would like to regress the stock returns on a constant. How can I achieve that ? Then...
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ANOVA and Post-hoc estimates using data including multiple imputations
Dear all, once more, multiple imputation is the bane of my existence I hope somebody can help me with what started out as a small little calculation. I couldn't find much info on the web and the one I...
View ArticleCounting events in event study
Dear all I have a dataset looking like this: Date Company_id event date estimation_window event_window event_id 2015-01-01 1 1 1 2015-01-02 1 1 1 2015-01-03 1 1 2015-01-04 1 1 1 2015-01-05 1 2015-01-05...
View Articlescatteri options
I am graphing 3 way interaction based on plotting points derived from calculating the adjusted mean value of peer support (y) for Black and White males and females at 2 different values of SES (4...
View ArticleCase-crossover study: conditional logistic regression
I have data from a case-crossover study. Prescription data on whether individuals have a given prescription at time 1 (yes/no) and time 2 (yes/no). I am interested in a within person analysis. I also...
View Articlecmp : Bivariate ordered probit and conditional probabilities
Dear all, I regress a bivariate ordered model using cmp. After my regression, I would like to compute the conditional probabilities Pr(y2=x|y1=z), with y1 the first equation and y2 the second one and...
View ArticleSimple: creating one label for many values, not dataset or variable
I was not able to find this in help: How can I create one label for several values in one variable. Example: I need NAICS codes 31-35 in variable SECTOR to have one label "Manufacturing". When I follow...
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