Editing Stock market crash (section)

===Result of investor imitation===
In 2011, using statistical analysis tools of [[complex systems]], research at the [[New England Complex Systems Institute]] found that the panics that lead to crashes come from a dramatic increase in [[imitation]] among investors, which always occurred during the year before each market crash. When investors closely follow each other's cues, it is easier for panic to take hold and affect the market. This work is a mathematical demonstration of a significant advance warning sign of impending market crashes.<ref>{{cite arXiv | eprint=1102.2620 | title=Predicting economic market crises using measures of collective panic | first1=Dion | last1=Harmon | first2=Marcus A. M. | last2=de Aguiar | first3=David D. | last3=Chinellato | first4=Dan | last4=Braha | first5=Irving R. | last5=Epstein | first6=Yaneer | last6=Bar-Yam | date=13 February 2011 | class=q-fin.ST}}</ref><ref>{{cite magazine | url=https://www.wired.com/2011/03/market-panic-signs/ | title=Possible Early Warning Sign for Market Crashes | first=Brandon | last=Keim | magazine=[[Wired (magazine)|Wired]] | date=March 18, 2011}}</ref>