PreparED Study Materials
ECON 21127: Principles of Economics
School: San Diego State University
Number of Notes and Study Guides Available: 0
Videos
Price Elasticity: Mid-Point Method & Its Practical Significance
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Grasp the essentials of price elasticity of demand through various calculation methods. Dive deep into the unique and consistent mid-point method, understanding its relevance in fluctuating markets. Learn its practical application in analyzing market dynamics.
Explaining Economic Logic of Purchasing-Power Parity
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
This video explains the theory of Purchasing Power Parity (PPP) in economics, emphasizing how it relies on the "law of one price" and illustrating how exchange rates should adjust to equalize purchasing power between nations in the long run. It also demonstrates how price disparities for products like iPhones can lead to currency exchange rate adjustments and eventually equalized prices.
Unraveling Economic Equations: From Price Level to Velocity of Money
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Discover how to calculate the price level and velocity of money using real-life data. Understand the relationship between money supply, GDP, and prices in the economy. Gain insights into the Federal Reserve's strategies for managing inflation and price stability.
Trade-offs in Life: Balancing Time, Money, Jobs, and Personal Ties
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Explore the concept of trade-offs in daily life, from balancing work and leisure to managing savings and expenses. Unravel the intricacies of prioritizing professional ambitions against personal ties. Learn how recognizing these trade-offs can guide more informed life decisions.
Barter to Money: How Double-Coincidence of Wants Evolved Trade
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Explore the historical barter system and its challenges, particularly the double-coincidence of wants. Witness how the need for simpler transactions led societies from direct barter to embracing mediums of exchange like money.
Micro vs. Macro: Unraveling the Twin Pillars of Economic Study Explain
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Unpack the primary subdivisions of economics: Microeconomics, centered on individual economic agents, and Macroeconomics, which looks at broader economic trends. Understand the core differences and inherent connections between these two fields. Explore real-world examples to comprehend their implications.



















