Ray Dalio在2008年美国金融危机之后,在Youtube上的分享的一个30分钟的视频,介绍生产效果、短期债务周期、长期债务周期的起源。这个视频对于没有任何经济学基础的人都是便于理解的。比尔盖茨对这个视频的推荐语是这样的:"This knowledge would help everyone as investors and citizens. Watching it for 30 minutes is a worthwhile investment." 这些知识对每个人都有帮助,无论是投资者还是普通人;看三十分钟本身就是一个值得的投资。。Two paranormal investigators are unexpectedly thrown together in the hope of solving a 100 year mystery. Locked for three nights in a house with a dark and unsettling past, the two investigators must put their differences to one side and work together. Scepticism and showmanship are soon put to one side when the two investigators realise there is more at stake than just their p...。