@unpublished{konrad2026directional,
  title        = {Inference for Directional Population Sensitivity: Fragility Curves and Breakdown in Linear Projections},
  author       = {Konrad, Lucas D. and Kuschnig, Nikolas},
  year         = {2026},
  month        = oct,
  note         = {Working paper},
  url          = {https://lucaskonrad.eu/files/directional_population_sensitivity.pdf}
}