TY - JOUR AU - Pindyck,Robert S. TI - Sunk Costs and Real Options in Antitrust JF - National Bureau of Economic Research Working Paper Series VL - No. 11430 PY - 2005 Y2 - June 2005 UR - http://www.nber.org/papers/w11430 L1 - http://www.nber.org/papers/w11430.pdf N1 - Author contact info: Robert S. Pindyck MIT Sloan School of Management 100 Main Street, E62-522 Cambridge, MA 02142 Tel: 617/253-6641 Fax: 617/258-6855 E-Mail: RPINDYCK@MIT.EDU AB - Sunk costs play a central role in antitrust economics, but are often misunderstood and mismeasured. I will try to clarify some of the conceptual and empirical issues related to sunk costs, and explain their implications for antitrust analysis. I will be particularly concerned with the role of uncertainty. When market conditions evolve unpredictably (as they almost always do), firms incur an opportunity cost when they invest in new capital, because they give up the option to wait for the arrival of new information about the likely returns from the investment. This option value is a sunk cost, and is just as relevant for antitrust analysis as the direct cost of a machine or a factory. ER -