The passing, aged 100, of the former US Federal Reserve chairman Alan Greenspan, prompts thoughts about shifting tensions between politicians and central bankers. Greenspan’s 18-year Fed tenure spanned those of presidents Reagan, Bush senior, Clinton and Bush junior. All had reason to thank him for his mastery of markets, even though history now regards him

A market maestro to some, he was criticized by others—including himself—for having too much faith in self-regulating markets.

The influential economist died Monday from complications of Parkinson’s disease, said his wife of 29 years, NBC News correspondent Andrea Mitchell.

Alan Greenspan, who served on the Federal Reserve under four presidents, died Monday at the age of 100.

Alan Greenspan, the influential economist who led the US Federal Reserve for almost 19 years and helped steer the world's largest economy through periods of growth and crisis, has…