ddid2: ddid2

In qte: Quantile Treatment Effects

ddid2

Description

Deprecated. Use ddid instead.

ddid2 is a legacy two-period wrapper for the Distributional Difference-in-Differences estimator. The modern replacement ddid uses a yname/gname/tname interface and supports staggered treatment adoption natively.

Usage

ddid2(
  formla,
  xformla = NULL,
  t,
  tmin1,
  tname,
  data,
  panel = TRUE,
  dropalwaystreated = TRUE,
  idname = NULL,
  probs = seq(0.05, 0.95, 0.05),
  iters = 100,
  alp = 0.05,
  method = "logit",
  se = TRUE,
  retEachIter = FALSE,
  seedvec = NULL,
  pl = FALSE,
  cores = NULL,
  biters = NULL,
  cl = NULL
)

Arguments

formla	formula of the form y ~ treat.
xformla	optional one-sided covariate formula.
t	post-treatment period.
tmin1	pre-treatment period.
tname	name of the time column.
data	data.frame.
panel	logical; whether data are panel (must be TRUE).
dropalwaystreated	logical; whether to drop always-treated units.
idname	name of the unit id column.
probs	quantile grid.
iters	bootstrap iterations.
alp	significance level.
method	propensity score estimation method ("logit").
se	logical; whether to compute bootstrap SEs.
retEachIter	logical; return per-iteration results.
seedvec	optional vector of seeds for reproducible bootstrap.
pl	logical; parallel bootstrap.
cores	number of cores.
biters	alias for iters; takes precedence if supplied.
cl	alias for cores; takes precedence if supplied.

Value

QTE object.

See Also

ddid

qte documentation built on July 23, 2026, 5:13 p.m.