Before that, in a period dating back to 1800, the average time period between market crashes was 14 years, according to research conduced by Stanford University professor James Van Horne.
For instance, eHarmony, a prominent online-dating service, touts the results of a survey conducted on its behalf by Harris Interactive, a market-research firm, that concludes it was responsible for an average of 542 people getting married every day in America between the start of 2008 and the end of June 2009.