“…In our q regression estimations (to be discussed below), we also include a set of control variables that are commonly used when q is specified as a dependent variable to measure firm value (see, e.g., Lang and Stulz (1994), Ofek (1995, 1996), Rajan, Servaes, and Zingales (2000), Lamont and Polk (2002), Villalonga (2004)). In particular, our set of control variables includes Size, the book value of total assets; Profitability, the ratio of earnings before interest, taxes, depreciation, and amortization (SNL item #132773) to the book value of total assets; and Earnings Volatility, the ratio of the standard deviation of earnings before interest, taxes, depreciation and amortization using three years of consecutive quarterly observations to the average book value of total assets estimated over the same time horizon.…”