CiC-deprecated

Deprecated. Use <code>cic</code> instead.
<code>CiC</code> is a legacy two-period wrapper for the Change in Changes
estimator. It accepts a formula and explicit <code>t</code>/<code>tmin1</code> time
period arguments. The modern replacement <code>cic</code> uses a
<code>yname</code>/<code>gname</code>/<code>tname</code> interface and supports staggered
treatment adoption natively via <code>ptetools</code>.

internal

Provides several methods for computing the Quantile Treatment
Effect (QTE) and Quantile Treatment Effect on the Treated (QTT). The main
cases covered are (i) treatment is randomly assigned, (ii) treatment is as
good as randomly assigned after conditioning on covariates (selection on
observables) using the methods of Firpo (2007)
<doi:10.1111/j.1468-0262.2007.00738.x>, and (iii) identification is based
on a Difference in Differences assumption, with support for several
varieties including Athey and Imbens (2006)
<doi:10.1111/j.1468-0262.2006.00668.x>, Callaway and Li (2019)
<doi:10.3982/QE935>, and Callaway, Li, and Oka (2018)
<doi:10.1016/j.jeconom.2018.06.008>. Version 2.0 adds a unified staggered
treatment adoption API (built on 'ptetools') for all DiD-based estimators,
as well as a new lagged-outcome unconfoundedness estimator ('lou_qtt').

Brantly Callaway

Quantile Treatment Effects

CiC-deprecated function

<dl><dt>formla</dt>
<dd>formula of the form <code>y ~ treat</code>.</dd>
<dt>xformla</dt>
<dd>optional one-sided covariate formula.</dd>
<dt>t</dt>
<dd>post-treatment period.</dd>
<dt>tmin1</dt>
<dd>pre-treatment period.</dd>
<dt>tname</dt>
<dd>name of the time column.</dd>
<dt>data</dt>
<dd>data.frame.</dd>
<dt>panel</dt>
<dd>logical; whether data are panel.</dd>
<dt>se</dt>
<dd>logical; whether to compute bootstrap SEs.</dd>
<dt>idname</dt>
<dd>name of the unit id column (required when <code>panel = TRUE</code>).</dd>
<dt>alp</dt>
<dd>significance level.</dd>
<dt>probs</dt>
<dd>quantile grid.</dd>
<dt>iters</dt>
<dd>bootstrap iterations.</dd>
<dt>pl</dt>
<dd>logical; parallel bootstrap.</dd>
<dt>cores</dt>
<dd>number of cores.</dd>
<dt>retEachIter</dt>
<dd>logical; return per-iteration results.</dd></dl>

Arguments

CiC — CiC-deprecated

<dl>

<dt>formla</dt>
<dd>formula of the form <code>y ~ treat</code>.</dd>


<dt>xformla</dt>
<dd>optional one-sided covariate formula.</dd>


<dt>t</dt>
<dd>post-treatment period.</dd>


<dt>tmin1</dt>
<dd>pre-treatment period.</dd>


<dt>tname</dt>
<dd>name of the time column.</dd>


<dt>data</dt>
<dd>data.frame.</dd>


<dt>panel</dt>
<dd>logical; whether data are panel.</dd>


<dt>se</dt>
<dd>logical; whether to compute bootstrap SEs.</dd>


<dt>idname</dt>
<dd>name of the unit id column (required when <code>panel = TRUE</code>).</dd>


<dt>alp</dt>
<dd>significance level.</dd>


<dt>probs</dt>
<dd>quantile grid.</dd>


<dt>iters</dt>
<dd>bootstrap iterations.</dd>


<dt>pl</dt>
<dd>logical; parallel bootstrap.</dd>


<dt>cores</dt>
<dd>number of cores.</dd>


<dt>retEachIter</dt>
<dd>logical; return per-iteration results.</dd>

</dl>

CiC-deprecated: CiC

Description

Usage

Value

Arguments

See Also