Survey Methodology Program
Survey Research Center, Institute for Social Research
University of Michigan
Sun Woong Kim
Steven G. Heeringa
Peter W. Solenberger
SPSNLP is a public-use SAS-based procedure implementing the suggested algorithm in the paper "Inclusion Probability Proportional to Size Sampling: A Nonlinear Programming Approach to Ensure a Nonnegative and Stable Variance Estimator" by Kim, Heeringa, and Solenberger...
SPSNLP is currently available for personal computers using the Microsoft Windows and Linux operating systems. It requires SAS version 6.12 or higher.
SPSNLP is freeware. The University of Michigan retains the copyright for SPSNLP and authorizes its use free of charge. See the SPSNLP License Agreement for details. Please report bugs or send comments to Peter Solenberger or Sun Woong Kim.
Documentation
| Installation Guide |
| User Guide |
| SPSNLP Paper |
Software
| Microsoft Windows | spsnlp_windows.zip |
| PC Linux 32-bit | spsnlp_pclinux32.tgz |
| PC Linux 64-bit | spsnlp_pclinux64.tgz |
Example
| Setup |
| Description and output |
Last updated 2 August 2007