The average score of economics majors on the Graduate Management Admission Test (GMAT) exceeds those of nearly all humanities and arts, social sciences, and business undergraduate majors but not those of most science, engineering, and mathematics majors.

In 1977 Sri Lanka was the first of the South Asian countries to decisively move away from the protectionist import-substitution trade policies that for many years had damaged their economic efficiency and hobbled their economic growth. Albeit with back-tracking episodes, Sri Lanka’s...