More work can also be done in examining the types of material weaknesses disclosed by firms. While we present one classification scheme, many possible alternatives exist. Moody ร, for example, proposes to break the material weaknesses into transaction-level processes and company-level control problems, and suggests that the latter indicates a more serious material weakness (Doss and Jonas 2004). Doyle et al. (2005) find this distinction IS important; they find that the company-level control problems, which cannot be audited as easily, are associated with lower earnings quality. Alternatively, future studies could explore links between disclosure of material weaknesses and fraud, earnings management, or restatements. These studies could help provide insights to the benefits of Sarbanes-Oxley, and Section 404 in particular.