diff --git a/man/pipgd_gini.Rd b/man/pipgd_gini.Rd
index 90d282e..39a3d8d 100644
--- a/man/pipgd_gini.Rd
+++ b/man/pipgd_gini.Rd
@@ -10,7 +10,8 @@ pipgd_gini(
   welfare = NULL,
   weight = NULL,
   complete = getOption("pipster.return_complete"),
-  lorenz = NULL
+  lorenz = NULL,
+  ...
 )
 }
 \arguments{
@@ -27,6 +28,8 @@ previously used \code{get_gd} functions. Default is \code{FALSE}}
 
 \item{lorenz}{character or NULL. Lorenz curve selected. It could be "lq" for
 Lorenz Quadratic or "lb" for Lorenz Beta}
+
+\item{...}{additional arguments for \link{pipgd_select_lorenz}}
 }
 \value{
 Returns a nested list containing distribution statistics:
diff --git a/man/pipgd_mld.Rd b/man/pipgd_mld.Rd
index 7842654..1b12cc4 100644
--- a/man/pipgd_mld.Rd
+++ b/man/pipgd_mld.Rd
@@ -10,7 +10,8 @@ pipgd_mld(
   welfare = NULL,
   weight = NULL,
   complete = getOption("pipster.return_complete"),
-  lorenz = NULL
+  lorenz = NULL,
+  ...
 )
 }
 \arguments{
@@ -27,6 +28,8 @@ previously used \code{get_gd} functions. Default is \code{FALSE}}
 
 \item{lorenz}{character or NULL. Lorenz curve selected. It could be "lq" for
 Lorenz Quadratic or "lb" for Lorenz Beta}
+
+\item{...}{additional arguments for \link{pipgd_select_lorenz}}
 }
 \value{
 Returns a nested list containing distribution statistics:
diff --git a/man/pipgd_params.Rd b/man/pipgd_params.Rd
index 0674d8e..e9bc217 100644
--- a/man/pipgd_params.Rd
+++ b/man/pipgd_params.Rd
@@ -4,7 +4,7 @@
 \alias{pipgd_params}
 \title{Get Group Data Parameters}
 \usage{
-pipgd_params(welfare, weight, mean = NULL, population = NULL)
+pipgd_params(welfare, weight, mean = 1, population = NULL)
 }
 \arguments{
 \item{welfare}{numeric vector of cumulative share of welfare (income/consumption)}
diff --git a/man/pipgd_polarization.Rd b/man/pipgd_polarization.Rd
index 3b845a8..2fb2234 100644
--- a/man/pipgd_polarization.Rd
+++ b/man/pipgd_polarization.Rd
@@ -5,6 +5,7 @@
 \title{Compute polarization index}
 \usage{
 pipgd_polarization(
+  pipster_object = NULL,
   params = NULL,
   welfare = NULL,
   weight = NULL,
@@ -15,6 +16,8 @@ pipgd_polarization(
 )
 }
 \arguments{
+\item{pipster_object}{pipster object created using \link{create_pipster_object}}
+
 \item{params}{list of parameters from \code{pipgd_validate_lorenz()}}
 
 \item{welfare}{numeric vector of cumulative share of welfare (income/consumption)}
diff --git a/man/pipgd_quantile.Rd b/man/pipgd_quantile.Rd
index 69f60de..7d8f2fa 100644
--- a/man/pipgd_quantile.Rd
+++ b/man/pipgd_quantile.Rd
@@ -11,9 +11,9 @@ pipgd_quantile(
   weight = NULL,
   n = 10,
   popshare = seq(from = 1/n, to = 1, by = 1/n),
-  mean = 1,
   complete = getOption("pipster.return_complete"),
-  lorenz = NULL
+  lorenz = NULL,
+  ...
 )
 }
 \arguments{
@@ -29,13 +29,13 @@ pipgd_quantile(
 
 \item{popshare}{numeric: vector of share of population. Default is \code{seq(from = 1/n, to = 1, by = 1/n)}}
 
-\item{mean}{numeric scalar of distribution mean. Default is 1}
-
 \item{complete}{logical: If TRUE, returns a list a cumulative returns from
 previously used \code{get_gd} functions. Default is \code{FALSE}}
 
 \item{lorenz}{character or NULL. Lorenz curve selected. It could be "lq" for
 Lorenz Quadratic or "lb" for Lorenz Beta}
+
+\item{...}{additional arguments for \link{pipgd_select_lorenz}}
 }
 \value{
 Returns a nested list containing distribution statistics:
diff --git a/man/pipgd_quantile_welfare_share.Rd b/man/pipgd_quantile_welfare_share.Rd
index 228279f..96036d3 100644
--- a/man/pipgd_quantile_welfare_share.Rd
+++ b/man/pipgd_quantile_welfare_share.Rd
@@ -12,7 +12,8 @@ pipgd_quantile_welfare_share(
   complete = getOption("pipster.return_complete"),
   lorenz = NULL,
   n = 10,
-  popshare = seq(from = 1/n, to = 1, by = 1/n)
+  popshare = seq(from = 1/n, to = 1, by = 1/n),
+  ...
 )
 }
 \arguments{
@@ -33,6 +34,8 @@ Lorenz Quadratic or "lb" for Lorenz Beta}
 \item{n}{numeric scalar for the number of quantiles to be used in \code{popshare}}
 
 \item{popshare}{numeric: vector of share of population. Default is \code{seq(from = 1/n, to = 1, by = 1/n)}}
+
+\item{...}{additional arguments for \link{pipgd_select_lorenz}}
 }
 \value{
 Returns a nested list containing distribution statistics:
diff --git a/man/pipgd_welfare_share_at.Rd b/man/pipgd_welfare_share_at.Rd
index 97db62f..7f6264f 100644
--- a/man/pipgd_welfare_share_at.Rd
+++ b/man/pipgd_welfare_share_at.Rd
@@ -12,7 +12,8 @@ pipgd_welfare_share_at(
   complete = getOption("pipster.return_complete"),
   lorenz = NULL,
   n = 10,
-  popshare = seq(from = 1/n, to = 1, by = 1/n)
+  popshare = seq(from = 1/n, to = 1, by = 1/n),
+  ...
 )
 }
 \arguments{
@@ -33,6 +34,8 @@ Lorenz Quadratic or "lb" for Lorenz Beta}
 \item{n}{numeric scalar for the number of quantiles to be used in \code{popshare}}
 
 \item{popshare}{numeric: vector of share of population. Default is \code{seq(from = 1/n, to = 1, by = 1/n)}}
+
+\item{...}{additional arguments for \link{pipgd_select_lorenz}}
 }
 \value{
 Returns a nested list containing distribution statistics:
diff --git a/man/validate_params.Rd b/man/validate_params.Rd
index a1553b8..ab1e579 100644
--- a/man/validate_params.Rd
+++ b/man/validate_params.Rd
@@ -4,7 +4,16 @@
 \alias{validate_params}
 \title{Validate group data parameters}
 \usage{
-validate_params(pipster_object, welfare, weight, params)
+validate_params(
+  pipster_object,
+  welfare,
+  weight,
+  params,
+  mean = 1,
+  times_mean = 1,
+  popshare = NULL,
+  povline = ifelse(is.null(popshare), mean * times_mean, NA_real_)
+)
 }
 \arguments{
 \item{pipster_object}{pipster object created using \link{create_pipster_object}}
@@ -14,6 +23,8 @@ validate_params(pipster_object, welfare, weight, params)
 \item{weight}{numeric vector of cumulative share of the population}
 
 \item{params}{list of parameters from \code{pipgd_validate_lorenz()}}
+
+\item{popshare}{numeric: vector of share of population. Default is \code{seq(from = 1/n, to = 1, by = 1/n)}}
 }
 \value{
 list: \code{params} to be used in gd functions