Source: Xie (2001) · The Accounting Review · DOI: 10.2308/accr.2001.76.3.357
TL;DR
Sloan (1996) showed the market overprices total accruals. Xie decomposes accruals into normal and abnormal (discretionary) accruals (Jones model) and shows the overpricing is driven by the abnormal component: the market overestimates the persistence of discretionary accruals and overprices them (56,692 firm-years, 1971–1992).
What anomaly it documents
Predictor: abnormal (discretionary) accruals from the Jones (1991) model.
Direction: negative — high abnormal accruals → low future returns.
Shape: the accrual anomaly concentrates in the discretionary component.