View source: R/stratumStructure.R

effectiveSampleSize | R Documentation |

The effective sample size is the sum of the harmonic means of the number units in treatment and control for each matched group. For k matched pairs, the effective sample size is k. As matched groups become more unbalanced, the effective sample size decreases.

```
effectiveSampleSize(x, z = NULL)
## S3 method for class 'factor'
effectiveSampleSize(x, z = NULL)
## Default S3 method:
effectiveSampleSize(x, z = NULL)
## S3 method for class 'table'
effectiveSampleSize(x, z = NULL)
```

`x` |
An |

`z` |
A treatment indicator, a vector the same length as |

The equivalent number of pairs in this match.

`summary.optmatch`

, `stratumStructure`

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