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# observationalBlocks

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The goal of observationalBlocks is to create block designs of fixed size
J with at least one treated and control unit per block. Blocks larger
than pairs better distinguish effects caused by a treatment from
unmeasured confounding in assignment of individuals to treatment.
Somewhat counterintuitively, blocks larger than pairs can use more units
while attaining better covariate balance and block homogeneity. A
forthcoming manuscript by Brumberg and Rosenbaum details the design.

## Installation

You can install the release version of observationalBlocks from
[CRAN](https://cran.r-project.org/) with:

``` r
install.packages("observationalBlocks")
```
