Given trends in cost and use, insulin out-of-pocket cost reduction policies would be more efficient if they targeted members in high-deductible health plans with savings options and low-income ...

Suppose that the independent variables in a linear regression are subject to error. This paper is concerned with the bias introduced into the least squares estimators by these errors, first when they ...

A bewilderingly large number of statistical quantities have been proposed to study outliers and influence of individual observations in regression analysis. In this article we describe the ...