The 9/11 attacks affected the business cycle by worsening an ongoing recession, leading to deeper economic woes.
The terrorist attacks on the World Trade Center on September 11, 2001, had a significant impact on the business cycle and played a role in deepening a recession that had begun in March 2001. The attacks led to the shutdown of transportation and financial markets, exacerbating the economic downturn. The National Bureau of Economic Research (NBER) Business Cycle Dating Committee stated that the attacks contributed to the recession by intensifying the economic contraction.
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