RC:main point:
用一个过桥的例子解释经济现象
structure:
1. london bridge: an example to illustrate the collective impact
● old老观点:attribute the issues to convenional factors
● new新观点: core issue->collective impact of pedestrian movement
2. a similar economy phenomenon
● major market players->pedestrian on swaying bridge->collective actions->exacbate market volatility
● example: Great Crunch
3. explain the economy phenomenon
● 老观点: greed or misjudgement
● 新观点: rational irrationality: individual rational decisions->aggregated->yied destructive collective outcomes