## Richard Williams, Notre Dame Sociology

Following are excerpts from my Graduate Statistics I and Graduate Statistics II notes.  These pages highlight the use of Stata for various problems.  In many cases, the handout is just a "Stata how to." If you want an explanation of the underlying statistical principles, you should go back to the complete course notes and look at the related handouts.  In other cases, the handout will also explain the statistical principles and provide SPSS examples, but you can easily skip to the Stata examples if that is all you are interested in  Other course notes, homeworks and exams contain additional examples of Stata usage that may be of interest.  Some readers may also want to look at the notes from my course on Categorical Data Analysis.  Also, my gologit2 and oglm (Ordinal Generalized Linear Models) programs may be of interest to those working with ordinal dependent variables.

NOTE: Some of these notes use programs listed in my Suggested Downloads, which you may want to install for yourself.  Notre Dame users (especially those who work in the public labs) should check out my Suggestions for Using Stata at Notre Dame.

ci-II.dta and ci-III.dta -- Stata data files used for Cases II and III in the CI handout

1sample-II.dta and 1sample-III.dta -- Stata data files used for Cases II and III in the one sample tests handout

2sample-II.dta, 2sample-III.dta, 2sample-IV.dta, 2sample-V.dta -- Stata data files used for Cases II, III, IV and V in the two sample tests handout

categ-I.dta, categ-II.dta, categ-III.dta-- Stata data files used for Cases I, II, III  in the categorical data analysis handout

oneway.dta - Stata data file used in the Stata One-Way ANOVA handout

twoway.dta - Stata data file used in the Stata Two-Way ANOVA handout

Using Stata 9 for OLS Regression  (Here is a similar handout for Stata 8)

reg01.dta - Stata data file used in the Stata Regression handout

reg01.dta - Stata data file used in the Multiple Regression & Matrices handout

Multicollinearity

mulicoll.dta - Stata data file used in the Multicollinearity handout

Missing Data

md.dta - Stata data file used in the Missing Data handout

Scale Construction (Very Brief Overview)

anomia.dta - Stata data file used in the Scale Construction handout

Outliers

outliers.dta - Stata data file used in the Outliers handout

Heteroskedasticity

reg01.dta - Stata data file used in the Heteroskedasticity handout

Imposing and Testing Equality Constraints in Models

blwh.dta - Stata data file used in the Constraints handout

Interaction Effects and Group Comparisons

blwh.dta - Stata data file used in the Interaction Effects handout

Interpreting Interaction Effects; Interaction Effects and Centering

drinking.dta - Stata data file used in the Interpreting Interaction Effects handout

Nonlinear relationships

nonlin1.dta and blwh.dta - Stata data file used in the nonlinear relationships handout

Using Stata for Logistic Regression

logist.dta - Stata data file used in the Logistic Regression handout

Ordered Logit Models

shuttle2.dta - Stata data file used in the Ordered Logit handout

Multinomial Logit Models

shuttle2.dta - Stata data file used in the Multinomial Logit handout

Nonrecursive Models

nonrecur.dta - Stata data file used in the Nonrecursive Models handout

Brief Overview of Manova

blwh.dta - Stata data file used in the Manova handout

Selected other highlights

Using Stata's Margins command to Estimate and Interpret Adjusted Predictions and Marginal Effects (click here for Powerpoint version)

Comparing Logit & Probit Coefficients Between Models and Across Groups (click here for Powerpoint version)

Useful sites for learning about Stata and other statistical programs

 Ben Jann's estout/esttab support page (esttab & estout are great for formatting output from Stata)