Equating of Multiple Forms (equateMultiple)
Equating of multiple forms using Item Response Theory (IRT) methods (Battauz M. (2017) <doi:10.1007/s11336-016-9517-x> and Haberman S. J. (2009) <doi:10.1002/j.2333-8504.2009.tb02197.x>).

Detecting Politeness Features in Text (politeness)
Detecting markers of politeness in English natural language. This package allows researchers to easily visualize and quantify politeness between groups of documents. This package combines prior research on the linguistic markers of politeness (Brown & Levinson, 1987 <http://…/1987-97641-000>; Danescu-Niculescu-Mizil et al., 2013 <arXiv:1306.6078>; Voigt et al., 2017 <doi:10.1073/pnas.1702413114>). We thank the Spencer Foundation, the Hewlett Foundation, and Harvard’s Institute for Quantitative Social Science for support.

Variational Mode Decomposition (vmd)
A port and extension to the original ‘Matlab’ code made public by Dragomiretskiy and Zosso, for conducting Variational Mode Decomposition (VMD) as described within their 2013 publication (publication: <doi:10.1109/TSP.2013.2288675>, source: <https://goo.gl/fJH1d5> ).

Semi-Confirmatory Structural Equation Modeling via Penalized Likelihood (lslx)
Fits semi-confirmatory structural equation modeling (SEM) via penalized likelihood (PL) with lasso or minimax concave penalty (MCP) developed by Huang, Chen, and Weng (2017) <doi:10.1007/s11336-017-9566-9>.