vt2_lasso

Estimate the CATE using the Lasso for Step 2

Implements methods to fit Virtual Twins models (Foster et al.
(2011) <doi:10.1002/sim.4322>) for identifying subgroups with differential
effects in the context of clinical trials while controlling the probability
of falsely detecting a differential effect when the conditional average
treatment effect is uniform across the study population using parameter
selection methods proposed in Wolf et al. (2022)
<doi:10.1177/17407745221095855>.

Jack Wolf

tehtuner

Fit and Tune Models to Detect Treatment Effect Heterogeneity

vt2_lasso function

<dl><dt>z</dt>
<dd>a numeric vector of estimated CATEs from Step 1</dd>
<dt>data</dt>
<dd>a data frame containing a response, binary treatment indicators,
and covariates.</dd>
<dt>Trt</dt>
<dd>a string specifying the name of the column of <code>data</code>
contains the treatment indicators.</dd>
<dt>Y</dt>
<dd>a string specifying the name of the column of <code>data</code>
contains the response.</dd>
<dt>theta</dt>
<dd>lasso penalty parameter (<code>lambda</code>)</dd></dl>

Arguments

Estimate the CATE using the Lasso for Step 2 — vt2_lasso

<dl>

<dt>z</dt>
<dd>a numeric vector of estimated CATEs from Step 1</dd>


<dt>data</dt>
<dd>a data frame containing a response, binary treatment indicators,
and covariates.</dd>


<dt>Trt</dt>
<dd>a string specifying the name of the column of <code>data</code>
contains the treatment indicators.</dd>


<dt>Y</dt>
<dd>a string specifying the name of the column of <code>data</code>
contains the response.</dd>


<dt>theta</dt>
<dd>lasso penalty parameter (<code>lambda</code>)</dd>

</dl>

vt2_lasso: Estimate the CATE using the Lasso for Step 2

Description

Usage

Value

Arguments

See Also