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Khan Academy
Khan Academy: Lesson Summary: Scarcity, Choice, and Opportunity Costs
An introduction to the concepts of scarcity, choice, and opportunity cost.
Khan Academy
Khan Academy: The Tradeoff Between Economic Output and Environmental Protection
Unfortunately, it's not possible for a country to maximize both its environmental protection and its economic output. Each country must make a decision about how the two goals should be balanced and how to achieve that balance.
Robert Schenk, PhD
Cyber Economics: Scarcity and Choice
This site from the St. Joseph's College examines the importance of scarcity and choice in terms of an economic system. A further explanation explores how various people have constructed utopias to assume away the problem of scarcity.
Khan Academy
Khan Academy: How Perfectly Competitive Firms Make Output Decisions
See examples of how perfectly competitive firms decide how much to produce.
Other
Ifpri: Critical Choices for China's Agricultural Policy
A short analysis published in May 1999 by International Food Policy Research Institute of China's agricultural policies since 1978 and what the future might hold for China in the area of farming and food supply.
Khan Academy
Khan Academy: Ap Macroeconomics: Lesson Summary: Opportunity Cost and the Ppc
In this lesson summary, review the key concepts, key terms, and key graphs for understanding opportunity cost and the production possibilities curve.
Khan Academy
Khan Academy: Lesson Overview Total Utility and Marginal Utility
This lesson focuses on total utility and marginal utility including definitions and examples.