Barnett and Salomon (2002), through an empirical study of SRI mutual funds, attempted to reconcile divergent perspectives of the relationship between CSP and CFP. They focussed their work to gather information about whether CSP and CFP were negatively associated, positively associated, or not related at all. They examined differences within socially screened funds rather than comparing socially screened to unscreened mutual funds. In 1876 fund-year observations (67 funds * 28 years worth of performance data), the study used a fixed year effect and a random fund effect as a control for statistical analysis and the result depicted no statistically significant difference between the performance of screened and unscreened portfolios; however, varying screening strategies did significantly differ the performance of mutual funds.