Internal function to produce lambda coefficients to use in the Case V correction for bivariate indirect range restriction.
.lambda_bvirr(ux, uy, sign_rxz = 1, sign_ryz = 1)
A vector of lambda values.
Vector of observed-score u ratios for X.
Vector of observed-score u ratios for Y.
Sign of the relationship between X and the selection mechanism.
Sign of the relationship between Y and the selection mechanism.
Dahlke, J. A., & Wiernik, B. M. (2020). Not restricted to selection research: Accounting for indirect range restriction in organizational research. Organizational Research Methods, 23(4), 717–749. tools:::Rd_expr_doi("10.1177/1094428119859398")