When a SSA ALJ accepts an estimate of available employment opportunities that relies on an extrapolation of known data across an entire market or geographical area without sufficient indicia of the extrapolation's reasoning, he or she impermissably shifts the burden of proof to the claimant, resulting in a determination that is not supported by substantial evidence.
http://media.ca7.uscourts.gov/cgi-bin/rssExec.pl?Submit=Display&Path=Y2018/D07-18/C:17-2978:J:Scudder:aut:T:fnOp:N:2188695:S:0
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.