Generalized Linear Models and Extensions, Second Edition

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ISBN 9781597180146
Cat# SZ0149
 

Features

  • Includes detailed documentation of the glm command in Stata
  • Presents mathematical theory behind GLMs and the possible algorithms used in fitting the parameters
  • Describes many specific varieties of GLMs available for continuous, binary, count, and multinomial outcomes
  • Introduces further extensions to the already broad class of GLMs, including quasi-likelihood and generalized additive models
  • Provides the datasets and programs used available online, making it easy to duplicate the authors' work as well as carry out alternative analyses on the same data
  • Summary

    Generalized Linear Models and Extensions, Second Edition provides a comprehensive overview of the nature and scope of generalized linear models (GLMs) and of the major changes to the basic GLM algorithm that allow modeling of data that violate GLM distributional assumptions. Deftly balancing theory and application, the book stands out in its coverage of the derivation of the GLM families and their foremost links, while also guiding readers in the application of the various models to real data. This edition has new sections on discrete response models, including zero-truncated, zero-inflated, censored, and hurdle count models, as well as heterogeneous negative binomial, generalized Poisson, and generalized binomial models. The book also includes a substantially expanded discussion of both proportional-odds and generalized ordered models, making it easy for readers to use these models in their own research.

    Table of Contents

    From the first edition:

    Introduction
    Origins and motivation
    Notational conventions
    Applied or theoretical?
    Road map

    PART I: FOUNDATIONS OF GENERALIZED LINEAR MODELS
    Generalized Linear Models
    Components
    Assumptions
    Exponential family
    Example: Using an offset in a GLM
    Summary

    GLM Estimation Algorithms
    Newton-Raphson
    Starting values for Newton-Raphson
    Fisher scoring
    Starting values for IRLS
    Goodness of fit
    Estimated variance matrices
    Estimation algorithms
    Summary

    Analysis of Fit
    Deviance
    Diagnostics
    Assessing the link function
    Checks for systematic departure from the model
    Residual analysis
    Model statistics

    PART II: CONTINUOUS RESPONSE MODELS
    The Gaussian Family
    Derivation of the GLM Gaussian family
    Derivation in terms of the mean
    IRLS GLM algorithm (non-binomial)
    Maximum likelihood estimation
    GLM log-normal models
    Expected versus observed information matrix
    Other Gaussian links
    Example: Relation to OLS

    The Gamma Family
    Derivation of the gamma model
    Example: Reciprocal link
    Maximum likelihood estimation
    Log-gamma models
    Identity-gamma models
    Using the gamma model for survival analysis

    The Inverse Gaussian Family
    Derivation of the inverse Gaussian model
    The inverse Gaussian algorithm
    Maximum likelihood algorithm
    Example: The canonical inverse Gaussian
    Non-canonical links

    The Power Family and Link
    Power links
    Example: Power link
    The power family

    PART III: BINOMIAL RESPONSE MODELS
    The Binomial-Logit Family
    Derivation of the binomial model
    Derivation of the Bernoulli model
    The binomial regression algorithm
    Example: Logistic regression
    Goodness-of-fit statistics
    Interpretation of parameter estimates

    The General Binomial Family
    Non-canonical binomial models
    Non-canonical binomial links (binary form)
    The probit model
    The complementary log-log and log-log models
    Other links
    Interpretation of coefficients

    The Problem of Overdispersion
    Overdispersion
    Scaling of standard errors
    Williams' procedure
    Robust standard errors

    PART IV: COUNT RESPONSE MODELS
    The Poisson Family
    Count response regression models
    Derivation of the Poisson algorithm
    Poisson regression: Examples
    Example: Testing overdispersion in the Poisson model
    Using the Poisson model for survival analysis
    Using offsets to compare models
    Interpretation of coefficients

    The Negative Binomial Family
    Constant overdispersion
    Variable overdispersion
    The log-negative binomial parameterization
    Negative binomial examples
    The geometric family
    Generalized negative binomial
    Interpretation of coefficients

    PART V: MULTINOMIAL RESPONSE MODELS
    The Ordered Response Family
    Ordered outcomes for general link
    Ordered logit
    Ordered probit
    Generalized ordered logit
    Example: Synthetic data
    Example: Automobile data

    Unordered Response Family
    The multinomial logit model
    The multinomial probit model

    PART VI: EXTENSIONS TO THE GLM
    Extending the Likelihood
    The quasi-likelihood
    Example: Wedderburn's leaf blotch data
    Generalized additive models

    Clustered Data
    Generalization from individual to clustered data
    Pooled estimators

    PART VII: STATA SOFTWARE
    Programs for Stata
    Syntax
    Syntax for predict
    Description
    Options
    User-written programs
    Remarks

    Tables
    References
    Author Index
    Subject Index

    Editorial Reviews

    Praise for the first edition
    "This book is a very useful and definitive handbook for anybody who wants to understand [GLMs] and to choose one to apply to a particular data analysis. The authors have written a very comprehensive account of a very large subject indeed, which is still very much under construction. I know of no other book where as much equally up-to-the-minute information on GLMs and their extensions can be found in one place."
    - Roger Newson, The Stata Journal, 2001

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