Dear All
I am attempting to append 20 smaller files together to produce one large
dataset with 20 different strata. When I describe and tab, this is what
comes out:
kt | Freq. Percent Cum.
------------+-----------------------------------
1 | 572 5.77 5.77
2 | 230 2.32 8.08
3 | 399 4.02 12.11
5 | 542 5.46 17.57
6 | 600 6.05 23.62
7 | 553 5.57 29.19
9 | 416 4.19 33.38
10 | 472 4.76 38.14
11 | 418 4.21 42.35
12 | 630 6.35 48.70
13 | 603 6.08 54.78
14 | 426 4.29 59.08
15 | 384 3.87 62.95
16 | 496 5.00 67.95
17 | 621 6.26 74.21
18 | 552 5.56 79.77
19 | 586 5.91 85.68
20 | 559 5.63 91.31
22 | 414 4.17 95.48
25 | 448 4.52 100.00
------------+-----------------------------------
Total | 9921 100.00
storage display value
variable name type format label variable label
-------------------------------------------------------------------------------
kt byte %8.0g
fwtia float %9.0g
After setting the survey components and running svy, Stata does not
recognize that there should be 20 strata in my new dataset. Two strata also
disappear when I set the pweight
. svymean shotdi*
Survey mean estimation
pweight: <none> Number of obs(*) = 8488
Strata: kt Number of strata = 17
PSU: cluster Number of PSUs = 665
Population size = 8488
. svyset pweight fwtia
. svymean shotdi*
Survey mean estimation
pweight: fwtia Number of obs = 4477
Strata: kt Number of strata = 15
PSU: cluster Number of PSUs = 540
Population size = 29590.974
What could have gone wrong? Any advice would be greatly appreciated!
Thanks in advance.
Phung
Institute for Social and Preventive Medicine (ISPM)
at the University of Zurich
Sumatrastrasse 30
CH-8006 Zurich, Switzerland
Tel: +41-1-634 46 72 /13
Fax: +41-1-634 49 84
email: [email protected]
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
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* http://www.ats.ucla.edu/stat/stata/
