Cross-Hauling in Input-Output Tables: Comments on CHARM

This brief note draws further attention to cross-hauling in regional input-output table estimation, and specifically identifies conceptual issues associated with Kronenberg?s CHARM method for adjusting input-output regionalization methods. Despite the shortcomings of the CHARM approach as it now stands, this is a very important line of research. I believe that progress made on the CHARM method is encouraging, and hope that future work will resolve remaining issues.