The global economy is one massive riddle. For instance, in a world characterized by sluggish economic growth, why are companies around the world hiring so aggressively, and why hasn’t the demand for workers translated into faster wage growth? As pointed out by writer Tom Fairless, from Tokyo to London, unemployment rates have declined. In America and in the United Kingdom, the official unemployment rate has been below five percent recently. In the 19 nation Eurozone, the unemployment rate just hit a seven year low.