Specifies the Balanced Repeated Replication (BRR) method for variance estimation. It may be used for cases where there are two clusters per stratum, as well as in cases where there are many clusters within a single stratum.
The REPWGT statement is required to specify the names of the BRR replicate weight variables. The WEIGHT statement is allowed, but not required. If it is omitted, SUDAAN uses the average of the replicate weight values. No NEST statement is allowed except for regression procedures when R=exchangeable is specified. You may use the REPDATA option on the PROC statement to specify a separate file of replicate weights. In this case you must include an IDVAR statement to specify the synchronizing variable(s) on the REPDATA file. You may also include a REP_REC option on the PROC statement to specify the number of records on the REPDATA file.