Facilitates access to the International Union for Conservation of Nature (IUCN) Red List of Threatened Species, a comprehensive global inventory of species at risk of extinction. This package streamlines the process of determining conservation status by matching species names with Red List data, providing tools to easily query and retrieve conservation statuses. Designed to support biodiversity research and conservation planning, this package relies on data from the 'iucnrdata' package, available on GitHub <https://github.com/PaulESantos/iucnrdata>. To install the data package, use pak::pak('PaulESantos/iucnrdata').

Implements a suite of sensitivity analysis tools for instrumental
  variable estimates as described in Cinelli and Hazlett (2025)
  <doi:10.1093/biomet/asaf004>.

Independent vector analysis (IVA) is a blind source separation (BSS) model where several datasets are jointly unmixed. This package provides several methods for the unmixing together with some performance measures. For details, see Anderson et al. (2011) <doi:10.1109/TSP.2011.2181836> and Lee et al. (2007) <doi:10.1016/j.sigpro.2007.01.010>.

Implements tests for the identifying assumptions of
    instrumental variable models, the local exclusion restriction and
    monotonicity conditions required for local average treatment effect
    identification. Covers Kitagawa (2015) <doi:10.3982/ECTA11974>,
    Mourifie and Wan (2017) <doi:10.1162/REST_a_00622>, and Frandsen,
    Lefgren, and Leslie (2023) <doi:10.1257/aer.20201860>. Includes a
    one-shot wrapper that runs all applicable tests on a fitted
    instrumental variable model. Dispatches on 'fixest' and 'ivreg'
    model objects.

A integrated variance correlation is proposed to measure the dependence between a categorical or continuous random variable and a continuous random variable or vector.
    This package is designed to estimate the new correlation coefficient with parametric and nonparametric approaches. 
    Test of independence for different problems can also be implemented via the new correlation coefficient with this package.