Cambridge University Press, 411p. Clearly one of the more interesting recent developments in applied micro-econometrics has been the development and use of models for count data.
Most econometric models deal with the behaviour of a continuous endogenous variable.
Even though hardly any variable is continuous in a strictly mathematical sense, the assumption of continuity is often reasonable. In some cases, the assumption of continuity is not reasonable and the discrete nature of the endogenous variable should be taken into account. Count data models can be used to model such endogenous variables. The current state of the literature is summarized in the book by Cameron and Trivedi, who have been actively contributing to the development of count data models since the eighties. The book is written more or less along the lines of a general econometrics textbook that discusses the linear model.