Missing Data
Share

Missing Data



© 2001 | 104 pages | SAGE Publications, Inc

Sooner or later anyone who does statistical analysis runs into problems with missing data in which information for some variables is missing for some cases. Why is this a problem? Because most statistical methods presume that every case has information on all the variables to be included in the analysis. Using numerous examples and practical tips, this book offers a nontechnical explanation of the standard methods for missing data (such as listwise or casewise deletion) as well as two newer (and, better) methods, maximum likelihood and multiple imputation. Anyone who has been relying on ad-hoc methods that are statistically inefficient or biased will find this book a welcome and accessible solution to their problems with handling missing data.

 

 

Learn more about "The Little Green Book" - QASS Series! Click Here

 
Series Editor's Introduction
 
1. Introduction
 
2. Assumptions
Missing Completely at Random  
Missing at Random  
Ignorable  
Nonignorable  
 
3. Conventional Methods
Listwise Deletion  
Pairwise Deletion  
Dummy Variable Adjustment  
Imputation  
Summary  
 
4. Maximum Likelihood
Review of Maximum Likelihood  
ML With Missing Data  
Contingency Table Data  
Linear Models With Normally Distributed Data  
The EM Algorithm  
EM Example  
Direct ML  
Direct ML Example  
Conclusion  
 
5. Multiple Imputation: Bascis
Single Random Imputation  
Multiple Random Imputation  
Allowing for Random Variation in the Parameter Estimates  
Multiple Imputation Under the Multivariate Normal Model  
Data Augmentation for the Multivariate Normal Model  
Convergence in Data Augmentation  
Sequential Verses Parallel Chains of Data Augmentation  
Using the Normal Model for Nonnormal or Categorical Data  
Exploratory Analysis  
MI Example 1  
 
6. Multiple Imputation: Complications
Interactions and Nonlinearities in MI  
Compatibility of the Imputation Model and the Analysis Model  
Role of the Dependent Variable in Imputation  
Using Additional Variables in the Imputation Process  
Other Parametric Approaches to Multiple Imputation  
Nonparametric and Partially Parametric Methods  
Sequential Generalized Regression Models  
Linear Hypothesis Tests and Likelihood Ratio Tests  
MI Example 2  
MI for Longitudinal and Other Clustered Data  
MI Example 3  
 
7. Nonignorable Missing Data
Two Classes of Models  
Heckman's Model for Sample Selection Bias  
ML Estimation With Pattern-Mixture Models  
Multiple Imputation With Pattern-Mixture Models  
 
8. Summary and Conclusion
 
Notes
 
References
 
About the Author

"…an excellent resource for researchers who are conducting multivariate statistical studies."

Richard A. Chechile
Journal of Mathematical Psychology

For instructors

Purchasing options

Please select a format:

ISBN: 9780761916727

SAGE Research Methods is a research methods tool created to help researchers, faculty and students with their research projects. SAGE Research Methods links over 175,000 pages of SAGE’s renowned book, journal and reference content with truly advanced search and discovery tools. Researchers can explore methods concepts to help them design research projects, understand particular methods or identify a new method, conduct their research, and write up their findings. Since SAGE Research Methods focuses on methodology rather than disciplines, it can be used across the social sciences, health sciences, and more.

With SAGE Research Methods, researchers can explore their chosen method across the depth and breadth of content, expanding or refining their search as needed; read online, print, or email full-text content; utilize suggested related methods and links to related authors from SAGE Research Methods' robust library and unique features; and even share their own collections of content through Methods Lists. SAGE Research Methods contains content from over 720 books, dictionaries, encyclopedias, and handbooks, the entire “Little Green Book,” and "Little Blue Book” series, two Major Works collating a selection of journal articles, and specially commissioned videos.