What does CORE mean? CoreEconomics is based on an extensive survey conducted by the author, Gerald Stone. Professor Stone asked several hundred instructors which chapters of their principles books they actually cover in their courses. Two important points emerged: - One chapter/one week. Instructors typically cover one chapter per week, or 15 chapters in a 15-week semester. - The majority of instructors teach the same 2/3 of a standard economics textbook...