IN ecological work it is often necessary to have comparative estimates of the numbers of organisms in a large number of samples. An exact valuation may not be required, but an approximate numerical ...

The authors study estimation of the total number of classes present in multiple overlapping populations. They show that the number of classes is identifiable in a nonparametric mixture model of ...

Mark-resight methods have been used to estimate numbers of mountain sheep (Ovis canadensis canadensis), but no evaluation has been made of potential bias or precision of estimates. We simulated the ...

China’s COVID-19 figures are not arithmetically sensible. The Communist Party has deliberately made estimation difficult, but, outside of Wuhan city and Hubei province, cases are low by a factor of ...