@techreport{ruto2026029estimat,
  author = {Ken Ruto},
  title = {Estimating What We Don't Know: A Confidence-Tiered Height Heuristic for Data-Sparse Cities},
  year = {2026},
  institution = {Flux (FluxImpact)},
  type = {Flux Working Paper No. 30},
  howpublished = {\url{https://fluximpact.org/blog/029-estimating-what-we-dont-know/}}
}