Misstatements that are not corrected in a given year because they are not deemed material likely will affect the financial statements in the following year. This impact might be in the form of a reversal of the amount (i.e., an overstatement of inventory in year 0 results in an understatement in year 1 -effectively canceling each other out) or the same level of misstatement may persist (valuing assets at cost overstates them across multiple years when depressed market values persist). Thus, auditors should consider this "rollover" effect of materiality when assessing the following year's financial statements. However, auditors also consider the absolute level of misstatement for any given year by drawing an "iron curtain" between each year. Determining whether auditors should consider misstatements from both a "rollover" and "iron curtain" perspective has been controversial for auditors. Argue whether auditors should consider misstatement strictly within a given year, across multiple years, or both.