Calculates the Cramer-von Mises test statistic
where H^-_n(\cdot) and H^+_n(\cdot) are the empirical CDFs of the the sample of baseline covariates close to the cutoff from the left and right, respectively. See equation (12) in Canay and Kamat (2017).
Numeric. The pooled sample of induced order statistics. The first column of S can be viewed as an independent sample of W conditional on Z being close to zero from the left. Similarly, the second column of S can be viewed as an independent sample of W conditional on Z being close to the cutoff from the right. See section 3 in Canay and Kamat (2017).
Returns the numeric value of the Cramer - von Mises test statistic.
Maurcio Olivares Gonzalez
Ignacio Sarmiento Barbieri
Canay, I and Kamat V, (2017) Approximate Permutation Tests and Induced Order Statistics in the Regression Discontinuity Design. http://faculty.wcas.northwestern.edu/~iac879/wp/RDDPermutations.pdf
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