文档介绍：Praise from the Experts
“The power of fixed effects es from their ability to control for observed and unobserved
time-invariant variables that might confound an analysis. As knowledge of this feature of fixed effects
models has spread, so has the interest in using these methods. One obstacle to further use has been the
lack of accessible and consolidated information on fixed effects methods in diverse models such as
linear regression, categorical and count regression, and event history models. A second obstacle to
wider use has been insufficient knowledge of the software to implement these techniques.
“Paul Allison’s Fixed Effects Regression Methods for Longitudinal Data Using SAS ® goes a long way
toward eliminating both barriers. This book is a clear, anized, and thoughtful guide to fixed
effects models. There are separate chapters devoted to linear regression, categorical response
variables, count data, and event history models. These models represent the most widely used ones in
the social sciences. In a brief monograph, Allison is able to present the essentials of fixed effects for
each model and the appropriate procedures in SAS that can implement them. Empirical examples and
SAS code are included, making it easier for the reader to implement these methods.… In sum, Paul
Allison has produced a terrific guide to fixed effects models and their estimation using SAS. I highly
mend it.”
h A. Bollen
Immerwahr Distinguished Professor of Sociology
Director, Odum Institute for Research in Social Science
University of North Carolina at Chapel Hill
“Fixed Effects Regression Methods for Longitudinal Data Using SAS represents an excellent piece of
work. It is clear, coherent, well-structured, useful, and has a sense of logical flow not always found in
efforts of this sort. To say that I was impressed with this book would be an understatement.
“What I especially liked about the book was how Allison is able to flui