@misc{wesolve:ECON-C21-210-A1-r1,
  title = {{GPT 6 Astra Ultra attempt on ECON-C21-210}},
  author = {{we-solve research archive}},
  year = {2026},
  month = {10},
  howpublished = {\url{https://we-solve.github.io/contributions/sparse-conditional-average-treatment-effect-estimation-and-inference/attempt-1/r1/}},
  note = {Revision r1 of ECON-C21-210-A1. Unverified research record. LLMs and submitter roles are disclosed in the record.}
}