Quote by Robert Sternberg
ACT and SAT each have their own parts of the country. The GRE has its lock on graduate admissions. And so, one could blame the companies, but really, economically, they have no incentive to change things very much because they're getting the business.
Summary
This quote suggests that standardized testing companies, such as ACT, SAT, and GRE, have monopolized different aspects of the education system, dividing their markets geographically. The quote implies that these companies have little motivation to reform their testing practices as they continue to profit from these exclusive arrangements. Essentially, the absence of competition allows these companies to maintain their control over admissions tests, despite potential criticisms or demands for change.