I am pleased to present to the students of SYBCOM Semester III of BUSINESS ECONOMICS III (MACRO ECONOMICS) based on the revised syllabus of HSNC University, Mumbai with effect from academic year 2021-22.This book is dedicated to the students who do not have or have little background of MACRO ECONOMICS. The book is edited through information available on internet; teachers own teaching experience and student's feedback. This is the first edition and has lots of scope to improve in future from the feedback from teachers, students and other readers. The book is written to cover and simplify syllabus of HSNC University, Mumbai. The book is recommended for non-economic background students.