R Under development (unstable) (2025-07-01 r88373 ucrt) -- "Unsuffered Consequences"
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> library(testthat)
> library(rddtools)
Loading required package: AER
Loading required package: car
Loading required package: carData
Loading required package: lmtest
Loading required package: zoo

Attaching package: 'zoo'

The following objects are masked from 'package:base':

    as.Date, as.Date.numeric

Loading required package: sandwich
Loading required package: survival
Loading required package: np
Nonparametric Kernel Methods for Mixed Datatypes (version 0.60-18)
[vignette("np_faq",package="np") provides answers to frequently asked questions]
[vignette("np",package="np") an overview]
[vignette("entropy_np",package="np") an overview of entropy-based methods]

Please consider citing R and rddtools,
citation()
citation('rddtools')

> 
> test_check("rddtools") 
[1] "Mass points detected in the running variable."
[1] "Mass points detected in the running variable."
[ FAIL 0 | WARN 3 | SKIP 0 | PASS 22 ]

[ FAIL 0 | WARN 3 | SKIP 0 | PASS 22 ]
> 
> proc.time()
   user  system elapsed 
   5.96    0.48    6.43