[R] Complex Surveys...Specifying Design

[Thomas Lumley]

On Fri, 23 Jul 2004, Tobias Verbeke wrote:

> I guess the most common way of proceeding is to first stratify,
> and then to sample clusters independently within each stratum.
> If this is the case, your data file can be put together like
>
> stratum		psu	...
> 1		1
> 1		2
> 1		3
> 2		1
> 2		2
> 2		3
>
> or like
>
> stratum		psu	...
> 1		1
> 1		2
> 1		3
> 2		4
> 2		5
> 2		6
>
> svydesign only likes the first data structure so

This is exactly backwards. svydesign by default assumes the *second* data
structure.


>
> meps.design <- svydesign(ids = ~varpsu01, strata = ~varstr01,
> 	weights = ~perwt01f, nest = TRUE, data = h60)
>
> should work. See ?svydesign.

This fix is correct, even if the rationale is backwards.

	-thomas