ECON 121: Principles of Macroeconomics

Explore the multifaceted role of economists in society, their interpretation of complex economic data, and how they provide guidance to decision-makers. Discover why economists may offer conflicting advice due to varying economic theories, data interpretation, personal values, and political ideologies.

Explore the differences between the Four-firm Concentration Ratio and the Herfindahl-Hirschman Index. Understand how they assess market concentration and dominance. Get insights into market power dynamics by comparing these two indices.

Grasp the distinction between nominal and real exchange rates, using the yen and dollar as examples. Learn how these rates influence purchasing power in different economies. Understand their implications in the global trade landscape.

Explore the nuances of the price effect in economics, focusing on the income and substitution effects. Understand through real-life scenarios how these phenomena influence consumer spending patterns. Gain insights into the intricate dynamics of consumer responses to price shifts.

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.

Unravel the implications of a 5% money supply increase on the aggregate price level. Learn about the Federal Reserve's influence and the dynamics of demand, supply, and inflation. Grasp how changes in money supply can affect prices and economic balance.