This paper presents a command, glst, for trend estimation across different exposure levels for either single or multiple summarized case-control, incidence-rate, and cumulative incidence data. This approach is based on constructing an approximate covariance estimate for the log relative risks...

We present the postestimation command xtvc to provide confidence intervals for the variance components of random-effects linear regression models. This command must be used after xtreg with option mle. Confidence intervals are based on the inversion of a score-based test (Bottai 2003). Copyright...

We present the new laplace command for estimating Laplace regression, which models quantiles of a possibly censored outcome variable given covariates. We illustrate laplace with an example from a clinical trial on survival in patients with metastatic renal carcinoma. We also report the results...

We present a set of Stata commands for the estimation, prediction, and graphical representation of logistic quantile regression described by Bottai, Cai, and McKeown (2010, Statistics in Medicine 29: 309–317). Logistic quantile regression models the quantiles of outcome variables that take on...

A common aim of epidemiological research is to assess the association between a particular exposure and a particular outcome, controlling for a set of additional covariates. This is often done by using a regression model for the outcome, conditional on exposure and covariates. A commonly used...

The use of flexible models for the relationship between a quantitative covariate and the response variable can be limited by the difficulty in interpret- ing the regression coefficients. In this article, we present a new postestimation command, xblc, that facilitates tabular and graphical...

Game theory can be defined as the study of mathematical mod- els of conflict and cooperation between intelligent and rational decision makers (Myerson 1991). Game-theory concepts apply in economy, sociology, biology, and health care, and whenever the actions of several agents (individuals,...

In this article, I review Flexible Parametric Survival Analysis Using Stata: Beyond the Cox Model, by Patrick Royston and Paul C. Lambert (2011 [Stata Press]). Copyright 2013 by StataCorp LP.

A significant aspect of data modeling with categorical predictors is the definition of a saturated model. In fact, there are different ways of specifying it—the casewise, the contingency table, and the collapsing approaches—and they strictly depend on the unit of analysis considered. The...

The new book by Jewell (2004) is reviewed.