subsample: Subsample of Observations from Panel Data

In bcallaway11/BMisc: Miscellaneous Functions for Panel Data, Quantiles, and Printing Results

Subsample of Observations from Panel Data

Description

returns a subsample of a panel data set; in particular drops all observations that are not in keepids. If it is not set, randomly keeps nkeep observations.

Usage

subsample(dta, idname, tname, keepids = NULL, nkeep = NULL)

Arguments

dta	a data.frame which is a balanced panel
idname	the name of the id variable
tname	the name of the time variable
keepids	which ids to keep
nkeep	how many ids to keep (only used if keepids is not set); the default is the number of unique ids

Value

a data.frame that contains a subsample of dta

Examples

data("LaborSupply", package = "plm")
nrow(LaborSupply)
unique(LaborSupply$year)
ss <- subsample(LaborSupply, "id", "year", nkeep = 100)
nrow(ss)

bcallaway11/BMisc documentation built on Jan. 12, 2025, 9:11 a.m.