design_estimand: What the design identifies

In couplr: Optimal Pairing and Matching via Linear Assignment

What the design identifies

Description

Every matching design in the package weights the left side at 1 and the right side to reproduce the left distribution within a pair, group or stratum, so what it targets is the effect on the left population: the ATT, in the orientation the matching layer is written in, where left holds the treated units.

Usage

design_estimand(n_left, n_left_matched)

Details

focal_discarded is how many left units the design did not retain. Calipers, max_distance and coarsened strata all drop focal units, and the estimate then speaks about the retained ones rather than about the whole treated group, which is what as_matchit() reports when it hands the estimand to MatchIt and marginaleffects.

Value

Named list of fields to merge into a result's info.

couplr documentation built on Sept. 17, 2026, 1:08 a.m.