MU284strat {robsurvey}

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

See Also

MU284pps

Examples

head(MU284strat)

library(survey)
# Survey design for stratified simple random sampling without replacement
dn <- if (packageVersion("survey") >= "4.2") {
        # survey design with pre-calibrated weights
        svydesign(ids = ~LABEL, strata = ~Stratum, fpc = ~fpc,
                  weights = ~weights, data = MU284strat,
                  calibrate.formula = ~-1 + Stratum)
    } else {
        # legacy mode
        svydesign(ids = ~LABEL, strata = ~Stratum, fpc = ~fpc,
                  weights = ~weights, data = MU284strat)
    }