NCA: Necessary Condition Analysis

Performs a Necessary Condition Analysis (NCA). (Dul, J. 2016. Necessary Condition Analysis (NCA). ”Logic and Methodology of 'Necessary but not Sufficient' causality." Organizational Research Methods 19(1), 10-52, <http://journals.sagepub.com/doi/abs/10.1177/1094428115584005>). NCA identifies necessary (but not sufficient) conditions in datasets, where x causes (e.g. precedes) y. Instead of drawing a regression line ”through the middle of the data” in an xy-plot, NCA draws the ceiling line. The ceiling line y = f(x) separates the area with observations from the area without observations. (Nearly) all observations are below the ceiling line: y <= f(x). The empty zone is in the upper left hand corner of the xy-plot (with the convention that the x-axis is ”horizontal” and the y-axis is ”vertical” and that values increase ”upwards” and ”to the right”). The ceiling line is a (piecewise) linear non-decreasing line: a linear step function or a straight line. It indicates which level of x (e.g. an effort or input) is necessary but not sufficient for a (desired) level of y (e.g. good performance or output). A quick start guide for using this package can be found here: <http://repub.eur.nl/pub/78323/> or <https://ssrn.com/abstract=2624981>.

Version: 3.0
Depends: R (≥ 3.0.1)
Imports: gplots, quantreg, sfa, KernSmooth, lpSolve, ggplot2, progress
Suggests: testthat
Published: 2018-08-01
Author: Jan Dul
Maintainer: Govert Buijs <buijs at rsm.nl>
License: GPL (≥ 3)
NeedsCompilation: no
CRAN checks: NCA results

Downloads:

Reference manual: NCA.pdf
Package source: NCA_3.0.tar.gz
Windows binaries: r-devel: NCA_3.0.zip, r-release: NCA_3.0.zip, r-oldrel: NCA_3.0.zip
OS X binaries: r-release: NCA_3.0.tgz, r-oldrel: NCA_3.0.tgz
Old sources: NCA archive

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