When I started my academic career, data projectors were huge and required two technicians to set them up. The entire Faculty had one data projector which had to be moved from venue to venue. I was one of the first academics to use PowerPoint. I was one of the innovators. Once high-speed internet and internet capacity expanded, PowerPoint lecture slides could go up onto the Web for students to download and digest. However, PowerPoint, has many downsides. This Slate presentation provides an amusing and insightful look at the misuse of PowerPoint in universities.
According to Robert Shiller , speaking at Davos, Bitcoin is a perfect example of a bubble - story here . Shiller sees Bitcoin as a backwards step in the evolution of money. George Selgin , a free banker, takes an opposing view - click here . Although he doesn't believe that Bitcoin is money, he sees its development as a fascinating turn in the evolution of money. In particular, he lauds the fact that Bitcoin production is constrained and cannot be infinite. There is a short video below where Bitcoin explain how it works.