This work considers how imperfect or misleading market information opens the door to speculation and distortion of economic choice, and how government sets the rules by which the financial world plays. It calls for policy changes to rationalize savings and investment decisions, promote long-term planning over speculation, encourage institutional investors to take a more active role in corporate governance, and disseminate more information to investors. Shiller's paper examines the economic basis of financial speculation and the intrinsic worth of measures proposed to rein in speculators or to limit the damage caused when their activity gets out of hand.