dot-ess: Effective Sample Size for IPW weights
In RobustMediate: Causal Mediation Analysis with Diagnostics and Sensitivity Analysis
.ess R Documentation
Effective Sample Size for IPW weights
Description
Returns the effective sample size (ESS) of the weighted sample:
ESS = (\sum w_i)^2 / \sum w_i^2
Values well below n indicate severe weighting and likely positivity problems.
Usage
.ess(weights)
Arguments
weights
Numeric vector of IPW weights.
Value
Scalar ESS value.
RobustMediate documentation built on April 16, 2026, 5:08 p.m.
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| .ess | R Documentation |
Effective Sample Size for IPW weights
Description
Returns the effective sample size (ESS) of the weighted sample:
ESS = (\sum w_i)^2 / \sum w_i^2
Values well below n indicate severe weighting and likely positivity problems.
Usage
.ess(weights)
Arguments
weights |
Numeric vector of IPW weights. |
Value
Scalar ESS value.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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