@misc{wesolve:ECON-H21-58-A3-r1,
  title = {{GPT 6 Astra Ultra attempt on ECON-H21-58, version 3}},
  author = {{we-solve research archive}},
  year = {2026},
  month = {10},
  howpublished = {\url{https://we-solve.github.io/contributions/coordinating-multiple-tax-instruments/attempt-3/r1/}},
  note = {Revision r1 of ECON-H21-58-A3. Unverified research record. LLMs and submitter roles are disclosed in the record.}
}