Here is the price-earnings ratio for the U.S. stock market from 1881 to the present-- this is also on that spreadsheet that you have on the website.

这是美国股票市场的市盈率,从1881年至今,这份数据也在网站上的电子数据表上

耶鲁公开课 - 金融市场课程节选

That was the corporation that produced the first spreadsheet program.

莲花公司是,第一个开发电子数据表软件的公司

耶鲁公开课 - 金融市场课程节选