While comparisons across companies are difficult due to a lack of standardised disclosures, how information for the same company is compiled, measured and converted into an aggregate score differs quite a bit from ERP to ERP. A study conducted by researchers from MIT, published in the Review of Finance, reported steep inconsistencies in the ESG ratings assigned to a business by different agencies (Berg, Koelbel, & Rigobon, 2022). In many cases, firms are assigned highly inconsistent ratings by different ERPs owing to differences in methodology, scope or weights (importance) assigned to attributes. The divergent estimates about the same underlying entity add to the confusion and defeat the very purpose of these ratings.