Returns a three-row tibble matching the structure of [tidy.attrition_bounds()]. Standard errors and the joint Imbens-Manski confidence interval are filled in when [estimator_trim()] was called with `se = "analytic"` or `se = "bootstrap"`, and are `NA` when it was called with `se = "none"` or when monotonicity failed.
Usage
# S3 method for class 'attrition_trim'
tidy(x, ...)