Extending the Linear Model With R: Generalized Linear, Mixed Effects and Nonparametric Regression Models

By John Thomas Ormerod. Statistics in Medicine, 2007

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cover point processes in the modern sense of random measures. This chapter also is more technical than the subsequent two on Markov processes. Chapter 4 (on discrete-time countable state Markov processes) is extremely short. At only 32 pages, it is shorter than all those covering a specific type of process, except for Chapter 6 (martingales). I wonder how much the typical student will benefit from the minimal, and delayed, presentation of this topic. In my experience, most students need this material early on, to fully appreciate just what stochastic processes are and what the relevant issues are, before moving on to the more technical processes. The fifth chapter (on continuous-time countable state Markov processes) is the best-developed chapter and contains many more examples than do the other chapters. Birth–death processes and queuing models get substantial coverage, and there is plenty of material here that an instructor may choose to incorporate into a course. I personally believe that an undergraduate text also should devote more space to discussion of covariance structure, especially in the context of Gaussian processes, to reinforce the notions of dependence. Examples with Kalman filters, time series, and control theory are certainly within the range of applications appropriate for a text such as this one. The opening chapter is quite long, covering a wide range of basic probability concepts, such as classification of distributions according to hazard rate behavior (e.g., IFR), partial ordering of distributions, Wald’s identity, general limit theorems, and even advanced inequalities, such as Hölder’s and Minkowski’s. The concise treatment makes these results easy to refer to, but again few if any examples are given for each topic and no context in which the student might appreciate their value is provided. On the other hand, these presentations can be skipped and then returned to later as needed. Although the title claims finance as an applied area, I could find only one financial application (options pricing in the chapter on Brownian motion), unless a few applications to actuarial science are included. The bottom line is that I would not use this book as a text for either an undergraduate or a graduate course. However, I will likely put it on the reference list for my course.

Subfields: Artificial Intelligence, Statistics and Probability

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