We draw attention to two problems associated with the use of instrumental variables (IV), the importance of which for empirical work has not been fully appreciated. First, the use of instruments that ...

The line of best fit is an output of regression analysis that represents the relationship between two or more variables in a dataset.

A linear relationship (or linear association) is a statistical term used to describe the directly proportional relationship between a variable and a constant.

Enter the time and distance of a recent race in the Runner's World pace calculator to calculate recommended training paces.