市场 赞赏经济塑造的 (ppt 37)

The  Purpose of this Chapter
To begin to understand the art of building an economic model
To begin to understand three basic elements of modeling in economics:
Purpose
Simplification through assumptions
Value judgment
The purpose of an economic model is to help provide precise insights (精确的洞察力）on a specific economic phenomenon.
Thus:
Different phenomena needs different model;
Simplification by assumption is necessary
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