A growing literature investigates the association between stock return variation and several aspects of information and governance structures, in both a cross-country setting and a cross-firm setting within the U.S. Papers use either idiosyncratic stock return volatility or R2 as interchangeable measures of firm-specific return variation but report inconsistent results. An important reason for the differing interpretations is the assumption about whether lower R2 (or higher ) captures firm-specific news or noise. We document that higher (or equivalently, lower R2) resembles noise. In addition, we show, analytically and empirically, that different results obtain when using R2 or because the systematic risk inherent in the R2 metric is also correlated with the independent variable of interest. Therefore, we recommend that when assessing the association between R2 (or ) and some independent variable, researchers (1) control for elements of systematic risk and (2) triangulate their findings with other measures of information environment. Data Availability: The data in this study are available from commercial providers, e.g., WRDS, Compustat, CRSP, I/B/E/S.

We examine (1) whether the accounting, governance, and investing practices of Berkshire Hathaway investees are consistent with Warren Buffett's public statements on what constitutes good accounting, governance, and investing practices and (2) whether these practices are associated with Berkshire's initial “selection” or Buffett's subsequent “influence.” Compared to control firms, we find that Berkshire investees are highly likely to follow Buffett's investment philosophy, somewhat likely to follow his preferred accounting, disclosure, and compensation policies, but unlikely to follow the board-related governance practices that we can measure. Second, we find some evidence that the business practices of future Berkshire investees are more aligned with Buffett's beliefs in the pre-investment period compared to control firms. Third, we find relatively modest evidence that investees improve a few of their business practices subsequent to Berkshire's initial investment. However, and overall, Buffett does not appear to be especially influential in the subsequent accounting, governance, and investing decisions of Berkshire investees, likely because he has already taken into account the attributes he cares most about in the initial investment decision. Data Availability: Except for the Gunning Fog Index and family firm status, other data in this study are available from commercial providers, e.g., CDA/Spectrum Institutional Money Manager Holdings, Compustat, CRSP.