MU284strat: Stratified Sample from the MU284 Population
In robsurvey: Robust Survey Statistics Estimation

MU284strat

R Documentation

Stratified Sample from the MU284 Population

Description

Stratified simple random sample (without replacement) of municipalities from the MU284 population in Särndal et al. (1992). Stratification is by geographic region and a take-all stratum (by 1975 population size), which includes the big cities Stockholm, Göteborg, and Malmö.

Usage

data(MU284strat)

Format

A data.frame with 60 observations on the following variables:

LABEL: identifier variable, [integer].
P85: 1985 population size (in thousands), [double].
P75: 1975 population size (in thousands), [double].
RMT85: Revenues from the 1985 municipal taxation (in millions of kronor), [double].
CS82: number of Conservative seats in municipal council, [double].
SS82: number of Social-Democrat seats in municipal council (1982), [double].
S82: total number of seats in municipal council (1982), [double].
ME84: number of municipal employees in 1984, [double].
REV84: real estate values according to 1984 assessment (in millions of kronor), [double].
CL: cluster indicator (a cluster consists of a set of neighbouring municipalities), [integer].
REG: geographic region indicator, [integer].
Stratum: stratum indicator, [integer].
weights: sampling weights, [double].
fpc: finite population correction, [double].

Details

The MU284 population of Särndal et al. (1992, Appendix B) is a dataset with observations on the 284 municipalities in Sweden in the late 1970s and early 1980s. The MU284 population data are available in the sampling package of Tillé and Matei (2021).

The population is divided into two parts based on 1975 population size (P75):

the MU281 population, which consists of the 281 smallest municipalities;
the MU3 population of the three biggest municipalities/ cities in Sweden (Stockholm, Göteborg, and Malmö).

The three biggest cities take exceedingly large values (representative outliers) on almost all of the variables. To account for this, a stratified sample has been drawn from the MU284 population using a take-all stratum. The sample data, MU284strat, (of size n=60) consists of

a stratified simple random sample (without replacement) from the MU281 population, where stratification is by geographic region (REG) with proportional sample size allocation;
a take-all stratum that includes the three biggest cities/ municipalities (population M3).

Source

Särndal, C.-E., Swensson, B. and Wretman, J. (1992). Model Assisted Survey Sampling, New York: Springer-Verlag.

Tillé, Y. and Matei, A. (2021). sampling: Survey Sampling. R package version 2.9. https://CRAN.R-project.org/package=sampling

Examples

data(MU284strat)

## Not run: 
# survey design for counties data (pkg survey is required)
library(survey)
dn <- svydesign(ids = ~LABEL, strata = ~Stratum, fpc = ~fpc,
    weights = ~weights, data = MU284strat)

## End(Not run)

robsurvey documentation built on Jan. 6, 2023, 5:09 p.m.