Cash flows play an important role in the accounting and finance literature. They are a major component of earnings, serve as a benchmark for earnings and accruals, and are an input to firm valuation. Although accrual measurement has been extensively studied, research on cash flow measurement remains limited. We review cash flow proxies researchers use in prior literature and highlight the importance of (1) identifying and defining the cash flow construct of interest based on the underlying research question and other constructs of interest and (2) selecting a cash flow proxy that minimizes measurement error and maps well into its construct. We also examine the challenges researchers face in measuring cash flows and demonstrate how measurement choices can affect the magnitude of coefficient estimates and statistical inferences. Finally, our study provides a framework researchers can follow to strengthen the construct validity of cash flow proxies.

Event studies of market efficiency measure earnings surprises using the consensus error ( CE ), given as actual earnings minus the average professional forecast. If a subset of forecasts can be biased, the ideal but difficult to estimate parameter‐dependent alternative to CE is a nonlinear filter of individual errors that adjusts for bias. We show that CE is a poor parameter‐free approximation of this ideal measure. The fraction of misses on the same side ( FOM ), which discards the magnitude of misses, offers a far better approximation. FOM performs particularly well against CE in predicting the returns of U.S. stocks, where bias is potentially large.

Using the Regulation SHO program as a quasi-experiment, we document that the threat of short selling has a negative effect on the volume of opportunistic insider selling and a positive effect on its profitability for each transaction. These effects are stronger among firms with higher litigation risk, greater media coverage, and executives who have more of their firms' stock-related holdings. We further find robust evidence when we extend the analyses to short selling deregulations in the Chinese and Hong Kong stock exchanges. Overall, our findings suggest that short sellers play a disciplinary role in opportunistic insider selling. Data Availability: Data are available from the public sources cited in the text.