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Foreword
5
Contents
9
List of Contributors
11
1 Introduction to Multilevel Analysis
14
1.1 History
14
1.2 Application Areas
16
1.3 Chapter Outline
18
1.4 Models
19
1.5 Loss Functions
32
1.6 Techniques and Algorithms
37
1.7 Software
60
1.8 Sampling Weights
61
1.9 A School Effects Example
67
1.10 Final Remarks
72
Appendix
73
References
81
2 Bayesian Multilevel Analysis and MCMC
89
2.1 Introduction
89
2.2 The Need for Simulation-Based Bayesian Computation
103
2.3 Markov Chain Monte Carlo (MCMC) Methods
106
2.4 MCMC Diagnostics
133
2.5 The Case Study Revisited
139
References
147
3 Diagnostic Checks for Multilevel Models
152
3.1 Specification of the Two-Level Model
152
3.2 Model Checks Within the Framework of the Hierarchical Linear Model
153
3.3 Residuals
160
3.4 Influence Diagnostics of Higher-Level Units
170
3.5 Simulation-Based Assessment of Model Specification
171
3.6 Non-linear Transformations in the Fixed Part
172
3.7 Polynomial Model
173
3.8 Regression Spline Model
173
3.9 Smoothing Spline Model
175
3.10 Example: Effect of IQ on a Language Test
180
3.11 Extensions
182
References
183
4 Optimal Designs for Multilevel Studies
187
4.1 Introduction
187
4.2 Optimality and Power
189
4.3 Optimal Designs for Experiments
191
4.4 Optimal Experimental Designs for Models with Covariates
196
4.5 Optimal Experimental Designs for Multilevel Logistic Models
198
4.6 Optimal Experimental Designs for Longitudinal Data
200
4.7 Optimal Designs for Surveys
203
4.8 Optimal Designs for Variance Parameters
207
4.9 Robustness of Optimal Designs
208
4.10 Concluding Remarks
210
References
211
5 Many Small Groups
216
5.1 Introduction
216
5.2 The Model
219
5.3 Some Applications
224
5.4 Validity of Statistical Inferences: Linear-Normal Case
233
5.5 Validity of Statistical Inferences: Non-Linear Link Functions
239
References
243
6 Multilevel Models for Ordinal and Nominal Variables
246
6.1 Introduction
246
6.2 Multilevel Logistic Regression Model
247
6.3 Multilevel Proportional Odds Model
252
6.4 Multilevel Nominal Response Models
259
6.5 Computational Issues
262
6.6 Intraclass Correlation
264
6.7 Heterogeneous Variance Terms
265
6.8 Health Services Research Example
267
6.9 Discussion
275
References
277
7 Multilevel and Related Models for Longitudinal Data
284
7.1 Introduction
284
7.2 Models with Unit-Specific Intercepts
286
7.3 Models with Unit-Specific Intercepts and Slopes
292
7.4 Models with Correlated Residual Errors
297
7.5 Models with Lagged Responses
299
7.6 Marginal Approaches
301
7.7 Concluding Remarks
304
References
304
8 Non-Hierarchical Multilevel Models
309
8.1 Introduction
309
8.2 Cross-Classified Models
309
8.3 Multiple Membership Models
328
8.4 Combining Multiple Membership and Cross- Classified Structures in a Single Model
335
8.5 Consequences of Ignoring Non-Hierarchical Structures
340
References
341
9 Multilevel Generalized Linear Models
343
9.1 Introduction
343
9.2 Extending Multilevel Models
345
9.3 Approaches to Estimation
354
9.4 Infant and Child Mortality in Kenya
366
9.5 Summary and Conclusions
378
References
379
10 Missing Data
385
10.1 Background and Generalities
385
10.2 Models for Missing Values
389
10.3 EM Algorithm and Multiple Imputation
391
10.4 Multiple Imputation
393
10.5 Missing Values in Multilevel Data
395
10.6 Other Applications of EM and MI
402
10.7 Summary
405
References
406
11 Resampling Multilevel Models
408
11.1 Introduction
408
11.2 Model, ML Estimation, and Assumptions
410
11.3 General Theory of Bootstrap and Jackknife
412
11.4 Bootstrapping Two-Level Models
417
11.5 Jackknifing Two-Level Models
427
11.6 Software
430
11.7 Empirical Evidence
431
11.8 Extensions
434
References
436
12 Multilevel Structural Equation Modeling
441
12.1 Introduction
441
12.2 A General Two-Level Structural Equation Model
442
12.3 Maximum Likelihood for General Means and Covariance Structures
445
12.4 Fit Statistics and Hypothesis Testing
450
12.5 A Simple Illustration
451
12.6 Practical Applications
454
12.7 Conclusion and Discussion
461
Appendix
464
References
482
Author Index
485
Subject Index
490
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