Folgert Karsdorp
Chao1.
What Shall We Do with the Unseen Sailor?.
Applies unseen species models to VOC historical records to estimate the true number of sailors missing from the archive.
Estimating Unseen Shared Cultural Diversity.
Extends unseen species models to estimate the shared diversity between two cultural collections — how many artefacts they have in common that neither has observed.
Population Size Estimation as a Regression Problem.
Reframes population size estimation as a Bayesian regression problem to correct for heterogeneous detection probabilities in cultural samples.
Zelterman's Estimator of Population Size.
Explores Zelterman's robust alternative to Chao1 — an estimator less sensitive to heterogeneity violations, tested on cultural and literary data.
Estimating Richness under Sampling without Replacement.
Examines how standard unseen species estimators break down under sampling without replacement, and how to correct for it.
Demystifying Chao1 with Good-Turing.
How Good-Turing frequency estimation underpins the Chao1 biodiversity estimator — and what that means for counting unseen cultural artefacts.
