Ball, Kothari, and Nikolaev (2011) make two major claims in their recent working paper titled “On estimating conditional conservatism.” While they agree that the effect documented in Patatoukas and Thomas (2011) biases the conditional conservatism estimate proposed in Basu (1997), they claim...

Basu (1997) proposes a measure of financial reporting conservatism based on asymmetry in the conditional earnings/returns relation. Patatoukas and Thomas (2011) show upward bias in this measure, because a placebo — lagged earnings — also exhibits similar asymmetry. Ball, Kothari, and...