LTW (2008) examine firms withdrawing from the SEC reporting system but continuing to trade on Pink Sheets. The paper finds that Sarbanes-Oxley increased the propensity of firms to go dark but, counter to conventional wisdom, had no significant effect on the rate of going-private transactions. Agency costs, as well as poor growth opportunities, proximity to financial distress, and increased compliance costs arising from SOX increase the propensity to go dark. Suggestions to improve the empirical implementation and interpretation involve including additional control and more suitable explanatory variables, and more attention to causation issues and to the quantification of economic significance.

This paper re-evaluates evidence in Ayers and Freeman [Ayers, F., Freeman, R., 1997. Market assessment of industry and firm earnings information. Journal of Accounting and Economics 24, 205–218] suggesting that investors anticipate industry-wide components of earnings earlier than firm-specific components, and that post-earnings-announcement drift following annual earnings announcements is due primarily to firm-specific components of earnings. Our tests indicate that post-announcement drift is entirely attributable to coefficient bias due to measurement errors in the use of realized earnings changes as proxies for unexpected earnings. Also, coefficient differences in the market's anticipation of subsequent-year industry and firm-specific earnings become insignificant when we introduce suitable controls for non-linearity in the return/earnings relation.

Increasing the conformity between accounting earnings and taxable income has been proposed to improve financial reporting and curtail aggressive tax planning. We find, however, that increasing conformity results in earnings that are less informative. Our inquiry exploits a unique sample of firms forced to change from the cash method to the accrual method for tax purposes, thereby increasing their book-tax conformity. We find that these firms experienced a decrease in earnings informativeness compared to control firms unaffected by the change. To our knowledge, this is the first evidence of tax law changes affecting the informativeness of accounting earnings.