A story on the AP wire reports that Moscow is now the most expensive city in the world to live in. Here is the part that stuck out when I read this article: “What’s so interesting now is that we do see, year to year, more fluctuation in these rankings than we used to,” Powers said. “The investment and flow of capital and businesses into developing countries has made them a bit more expensive.” The article also points out how currency plays a big role; for example, a weaker yen pushed Tokyo down to third.