WhatIf: Evaluate Counterfactuals
Version 1.5-9

Inferences about counterfactuals are essential for prediction, answering what if questions, and estimating causal effects. However, when the counterfactuals posed are too far from the data at hand, conclusions drawn from well-specified statistical analyses become based largely on speculation hidden in convenient modeling assumptions that few would be willing to defend. Unfortunately, standard statistical approaches assume the veracity of the model rather than revealing the degree of model-dependence, which makes this problem hard to detect. WhatIf offers easy-to-apply methods to evaluate counterfactuals that do not require sensitivity testing over specified classes of models. If an analysis fails the tests offered here, then we know that substantive inferences will be sensitive to at least some modeling choices that are not based on empirical evidence, no matter what method of inference one chooses to use. WhatIf implements the methods for evaluating counterfactuals discussed in Gary King and Langche Zeng, 2006, "The Dangers of Extreme Counterfactuals," Political Analysis 14 (2) ; and Gary King and Langche Zeng, 2007, "When Can History Be Our Guide? The Pitfalls of Counterfactual Inference," International Studies Quarterly 51 (March) .

Getting started

Package details

AuthorChristopher Gandrud [aut, cre], Gary King [aut], Ben Sabath [ctb], Heather Stoll [aut], Langche Zeng [aut]
Date of publication2017-07-25 11:36:40 UTC
MaintainerChristopher Gandrud <[email protected]>
LicenseGPL (>= 3)
Version1.5-9
URL http://gking.harvard.edu/whatif
Package repositoryView on CRAN
Installation Install the latest version of this package by entering the following in R:
install.packages("WhatIf")

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WhatIf documentation built on July 25, 2017, 5:02 p.m.