AssignPSUSamplingParameters: Assign PSU Sampling Parameters

In StoXProject/RstoxFDA: Fisheries Dependent Analysis with RstoX

Assign PSU Sampling Parameters

Description

Assigns data records to PSU Sampling Parameters, provides non-response adjustments for selected PSUs that was not sampled, and changes SamplingUnitId to that used to identify data records.

Usage

AssignPSUSamplingParameters(
  PSUSamplingParametersData,
  StoxBioticData,
  SamplingUnitId = character(),
  DataRecordId = character(),
  DefinitionMethod = c("MissingAtRandom")
)

Arguments

PSUSamplingParametersData	PSUSamplingParametersData with sampling parameters for PSU selection
StoxBioticData	StoxBioticData with data records for responding PSUs.
SamplingUnitId	name of Variable in StoxBioticData that represent the SamplingUnitId of PSUs selected for sampling
DataRecordId	name of Variable in StoxBioticData that represent records of sampled PSUs
DefinitionMethod	The method for dealing with non-response, e.g. 'MissingAtRandon'

Details

Some sampling parameters provided in PSUSamplingParametersData are only interpretable for sampling with complete response. This function adjusts these parameters, removes non-respondents from the PSUSamplingParametersData, and checks that all responding PSUs are present in data records.

After correcting for non-response, the SamplingUnitId in PSUSamplingParametersData will be replaced by an ID (argument 'DataRecordId') so that sampling units can be brought into correspondence with how they are identified in lower level sampling (IndividualSamplingParametersData)

If any respondents (rows of the SelectionTable of PSUSamplingParametersData that does not have NA for SamplingUnitId) are not found in 'SamplingUnitId', execution halts with an error.

Response after selection can generally be considered a process that modifies the sampling parameters that are set by design. Typically sample size, InclusionProbabilities and normalized SamplingWeights need to be adjusted as non-respondents are removed, since these are depend of the entire sample, not just the sampling unit they are assigned to. SelectionProbabilites are by definition set for a single draw of a single sampling unit from the population and are valid even when response is not complete.

Treatment of non-response requires some assumption about systematic differences between respondents and non-respondents. These assumptions are specified via the argument 'DefinitionMethod' and the following options are available:

MissingAtRandom

A response propensity is estimated for each stratum as the fraction of the sample resonding, and sample size (n) and InclusionProbability are adjusted by multiplying with this propensity. Sampling weights are adjusted by dividing them with their sum over repsondents in a stratum.

Value

PSUSamplingParametersData without non-respondent and with 'SamplingUnitId' changed

See Also

ReadPSUSamplingParameters, ComputePSUSamplingParameters, AddPsuStratificationVariables, ComputeIndividualSamplingParameters, AnalyticalPopulationEstimate

StoXProject/RstoxFDA documentation built on June 14, 2025, 1:37 a.m.