Bond rating agencies have invested significant sums of money in an effort to determine which quantitative and non-quantitative factors best predict bond defaults. Furthermore, some of the raters invest time and money to meet privately with corporate personnel to get nonpublic information that is used in assigning the issues bond rating. To recoup those costs, some bond rating agencies have tied their ratings to the purchase of additional services. Do you believe that this is an acceptable practice? Defend your position.