ECON 221 Chapter Notes - Chapter 3: Marginalism, Marginal Cost

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6 Sep 2016
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When an economic agent chooses the best feasible option, she is optimizing. Optimization in levels calculates the total net benefit of different alternatives and then chooses the best alternative. Optimization in differences calculates the change in net benefits when a person switches from one alternative to another, and then uses these marginal comparisons to choose the best alternative. Optimization in levels and optimization in differences give identical answers. Section 3. 1 two kinds of optimization: a matter of focus. Economists believe that optimization describes most of the choices that people, households, businesses, and governments make. Optimization can be implemented using either of two techniques of cost-benefit analysis: optimization in levels, optimization in differences, (examples of these two types on pg. If you choose optimally, this shift in focus shouldn"t have changed your final decision: in many cases, optimization in differences is faster and easier, because you focus on the key differences between the options.

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