The follow up to Share This: The Social Media Handbook for PR Professionals Share Thisis a practical handbook to the changes taking place in the media and was conceived and written by 24 public relations practitioners using many of the social tools and techniques that it addresses. The book...

Empirical tests of option pricing models are joint tests of the 'correctness' of the model, the efficiency of the market and the simultaneity of price observations. Some degree of nonsimultaeity can be expected in all but the most liquid markets and is therefore evident in many non-US markets....