There is a generally held belief that an expansion of the exports sector in a country would usually lead to an improved economic growth. However, a survey of the literature indicates that a great variety of techniques, data sets and country groups have been employed in empirical assessments of...

A new effect size representing the predictive power of an independent variable from a multiple regression model is presented. The index, denoted as rsp, is the semipartial correlation of the predictor with the outcome of interest. This effect size can be computed when multiple predictor...