Economist Quotes and aphorisms about down Thomas Sowell Thomas Sowell Thomas Sowell Alan Greenspan Alan Greenspan ,, Fear and euphoria are dominant forces, and fear is many multiples the size of euphoria. Bubbles go ... Alan Greenspan ,, What a sound money system does is to stabilize all the elements in it, and reduces the uncertainty ... Alan Greenspan Paul Samuelson Arthur Laffer Eugene Fama