Maximum Likelihood Estimation with Stata, 5th Edition

Maximum Likelihood Estimation with Stata, Fifth Edition is the essential reference and guide for researchers in all disciplines who wish to write maximum likelihood (ML) estimators in Stata. Beyond providing comprehensive coverage of Stata's command for writing ML estimators, the book presents an overview of the underpinnings of maximum likelihood and how to think about ML estimation.
The fifth edition includes a new second chapter that demonstrates the easy-to-usemlexpcommand. This command allows you to directly specify a likelihood function and perform estimation without any programming.
The core of the book focuses on Stata'smlcommand. It shows you how to take full advantage ofml's noteworthy features:
- Linear constraints
- Four optimization algorithms (Newton-Raphson, DFP, BFGS, and BHHH)
- Observed information matrix (OIM) variance estimator
- Outer product of gradients (OPG) variance estimator
- Huber/White/sandwich robust variance estimator
- Cluster-robust variance estimator
- Complete and automatic support for survey data analysis
- Direct support of evaluator functions written in Mata
When appropriate options are used, many of these features are provided automatically bymland require no special programming or intervention by the researcher writing the estimator.
In later chapters, you will learn how to take advantage of Mata, Stata's matrix programming language. For ease of programming and potential speed improvements, you can write your likelihood-evaluator program in Mata and continue to usemlto control the maximization process. A new chapter in the fifth edition shows how you can use themoptimize()suite of Mata functions if you want to implement your maximum likelihood estimator entirely within Mata.
In the final chapter, the authors illustrate the major steps required to get from log-likelihood function to fully operational estimation command. This is done using several different models: logit and probit, linear regression, Weibull regression, the Cox proportional hazards model, random-effects regression, and seemingly unrelated regression. This edition adds a new example of a bivariate Poisson model, a model that is not available otherwise in Stata.
The authors provide extensive advice for developing your own estimation commands. With a little care and the help of this book, users will be able to write their own estimation commands-commands that look and behave just like the official estimation commands in Stata.
Whether you want to fit a special ML estimator for your own research or wish to write a general-purpose ML estimator for others to use, you need this book.




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