UPSC candidates should focus on several crucial economic studies topics to excel in their exams. Key areas include Indian economy, covering topics like fiscal and monetary policy, inflation, and economic growth. Understanding the Global economy is also important, as it connects India's economic status to international trends. Other significant topics include poverty alleviation measures, human development indicators, and the impact of various economic reforms. Additionally, grasping concepts related to agriculture, trade, and industrialization can prove beneficial for both the prelims and mains exams.