Apportionment methods are used to translate a set of positive natural numbers into a set of smaller natural numbers while keeping the proportions between the numbers very similar. The methods are used to allocate seats in a chamber proportionally to the number of votes for a party in an election...

In a series of recent articles, Karlson, Holm, and Breen have developed a method for comparing estimated coefficients of nested nonlinear probability models. The KHB method is a general decomposition method that is unaffected by the rescaling or attenuation bias that arises in cross- model...

Data Analysis Using Stata provides a comprehensive introduction to Stata that will be useful to those who are just learning statistics and Stata as well as users of other statistical packages making the switch to Stata. Throughout the book, the authors make extensive use of examples using data...

Biplots display interunit distances, as well as variances and correlations of variables of large datasets. They can be used as a tool to reveal clustering, multicollinearity, and multivariate outliers, and to guide the interpretation of principal component analyses (PCA). This article describes...