As the Chinese calendar warned us, it did indeed turn out to be a year of the rat. If you‘re in any doubt about the economic crisis of 2008, here’s a single significant indicator: Pharmaceutical companies’ spending on advertising declined this year for the first time in history. Walgreen’s CEO Jeffrey Rein was quoted in FierceBiotech as calling 2008 “the tightest market for prescription drugs” in his 27-year career. If big pharma and big retail were feeling the pain, of…