pick_time_refs

Identify time period referents within each cohort.

Fits linear difference-in-differences models in scenarios where
intervention roll-outs are staggered over time. The package implements a
version of an approach proposed by Sun and Abraham (2021)
<doi:10.1016/j.jeconom.2020.09.006> to estimate cohort- and
time-since-treatment specific difference-in-differences parameters, and it
provides convenience functions both for specifying the model and for
flexibly aggregating coefficients to answer a variety of research questions.

Kyle Hart

staggR

Fit Difference-in-Differences Models with Staggered
Interventions

Stephan Lindner

pick_time_refs function

<dl><dt>df</dt>
<dd>A data frame containing the variables in the model.</dd>
<dt>cohort_var</dt>
<dd>String specifying the name of the column in <code>df</code> that
defines the intervention cohorts.</dd>
<dt>cohort_ref</dt>
<dd>An optional string specifying the value of <code>cohort_var</code> to
be used as the referent in the model. If not specified, the value is taken
from the first observed value in <code>cohort_var</code>.</dd>
<dt>time_var</dt>
<dd>String specifying the name of the column in <code>df</code> that defines
time periods over the study.</dd>
<dt>intervention_var</dt>
<dd>String specifying the name of the column in <code>df</code> that
defines the intervention period. If values of <code>cohort_var</code> are named to match
values of <code>time_var</code>, this parameter is not necessary.</dd>
<dt>time_offset</dt>
<dd>Integer specifying which time period relative to the
intervention time period should be used as the referent for each cohort.
Defaults to -1, which corresponds to the time period immediately preceding
intervention.</dd></dl>

Arguments

Identify time period referents within each cohort. — pick_time_refs

<dl>

<dt>df</dt>
<dd>A data frame containing the variables in the model.</dd>


<dt>cohort_var</dt>
<dd>String specifying the name of the column in <code>df</code> that
defines the intervention cohorts.</dd>


<dt>cohort_ref</dt>
<dd>An optional string specifying the value of <code>cohort_var</code> to
be used as the referent in the model. If not specified, the value is taken
from the first observed value in <code>cohort_var</code>.</dd>


<dt>time_var</dt>
<dd>String specifying the name of the column in <code>df</code> that defines
time periods over the study.</dd>


<dt>intervention_var</dt>
<dd>String specifying the name of the column in <code>df</code> that
defines the intervention period. If values of <code>cohort_var</code> are named to match
values of <code>time_var</code>, this parameter is not necessary.</dd>


<dt>time_offset</dt>
<dd>Integer specifying which time period relative to the
intervention time period should be used as the referent for each cohort.
Defaults to -1, which corresponds to the time period immediately preceding
intervention.</dd>

</dl>

pick_time_refs: Identify time period referents within each cohort.

Description

Usage

Value

Arguments

Examples