UCLA Health

An introduction to instrumental variables for epidemiologists

Instrumental-variable (IV) methods were invented over 70 years ago, but remain uncommon in epidemiology. Over the past decade or so, non-parametric versions of IV methods have a...

Partially parametric techniques for multiple imputation

Wagner and Dollo: A Stochastic Duet by Composing Two Parsimonious Solos

New contributions toward generalizing evolutionary models expand greatly our ability to analyze complex evolutionary characters and advance phylogeny reconstruction. In this art...

Fatalism in the context of COVID-19: Perceiving coronavirus as a death sentence predicts reluctance to perform recommended preventive behaviors

To manage the spread of coronavirus, health entities have urged the public to take preventive measures such as social distancing and handwashing. Yet, many appear reluctant to t...

Distributed systems

Growth of distributed systems has attained unstoppable momentum. If we better understood how to think about, analyze, and design distributed systems, we could direct their imple...

Unifying Vertical and Nonvertical Evolution: A Stochastic ARG-based Framework

Evolutionary biologists have introduced numerous statistical approaches to explore nonvertical evolution, such as horizontal gene transfer, recombination, and genomic reassortme...

Goodness-of-fit measures of <i>R</i> ² for repeated measures mixed effect models

Linear mixed effects model (LMEM) is efficient in modeling repeated measures longitudinal data. However, little research has been done in developing goodness-of-fit measures tha...

Standardized estimates from categorical regression models

Abstract We consider the problem of interpreting categorical regression models, such as the polytomous logistic model, the continuation‐ratio model, the stereotype model, and th...

Estimating Standardized Risk Differences from Odds Ratios

Holland (1989, Biometrics 45, 1009-1016) gave simple formulas for an "adjusted" risk difference based on the Mantel-Haenszel odds ratio estimator and its variance. This "adjuste...

A MULTIVARIATE INVESTIGATION OF PREFERENCES

The concept of preference is of primary importance in psychology. It has had an implicit role in almost every psychological theory, but no major efforts have been directed towar...