The name is absent



Stata                                                                 november 1994

Technical                                                                 stb-22

Bulletin

A publication to promote communication among Stata users

Editor


Sean Becketti

Stata Technical Bulletin

8 Wakeman Road

South Salem, New York 10590
914-533-2278

914-533-2902 FAX
[email protected] EMAIL


Associate Editors

Francis X. Diebold, University of Pennsylvania

Joanne M. Garrett, University of North Carolina
Marcello Pagano, Harvard School of Public Health
James L. Powell, UC Berkeley and Princeton University
J. Patrick Royston, Royal Postgraduate Medical School

Subscriptions are available from Stata Corporation, email [email protected], telephone 979-696-4600 or 800-STATAPC,
fax 979-696-4601. Current subscription prices are posted at
www.stata.com/bookstore/stb.html.

Previous Issues are available individually from StataCorp. See www.stata.com/bookstore/stbj.html for details.

Submissions to the STB, including submissions to the supporting files (programs, datasets, and help files), are on
a nonexclusive, free-use basis. In particular, the author grants to StataCorp the nonexclusive right to copyright and
distribute the material in accordance with the Copyright Statement below. The author also grants to StataCorp the right
to freely use the ideas, including communication of the ideas to other parties, even if the material is never published
in the STB. Submissions should be addressed to the Editor. Submission guidelines can be obtained from either the
editor or StataCorp.

Copyright Statement. The Stata Technical Bulletin (STB) and the contents of the supporting files (programs,
datasets, and help files) are copyright @ by StataCorp. The contents of the supporting files (programs, datasets, and
help files), may be copied or reproduced by any means whatsoever, in whole or in part, as long as any copy or
reproduction includes attribution to both (1) the author and (2) the STB.

The insertions appearing in the STB may be copied or reproduced as printed copies, in whole or in part, as long
as any copy or reproduction includes attribution to both (1) the author and (2) the STB. Written permission must be
obtained from Stata Corporation if you wish to make electronic copies of the insertions.

Users of any of the software, ideas, data, or other materials published in the STB or the supporting files understand
that such use is made without warranty of any kind, either by the STB, the author, or Stata Corporation. In particular,
there is no warranty of fitness of purpose or merchantability, nor for special, incidental, or consequential damages such
as loss of profits. The purpose of the STB is to promote free communication among Stata users.

The Stata Technical Bulletin (ISSN 1097-8879) is published six times per year by Stata Corporation. Stata is a registered
trademark of Stata Corporation.

Contents of this issue

page


an50.

Submission guidelines

2

dm21.

Bringing large data sets into memory

3

dm22.

Sorting in descending order

5

dm23.

Saving a subset of the current data set

6

dt2.

Reading public use microdata samples into Stata

6

sg26.1.

Fractional polynomials: Correction

11

sg27.

The overlapping coefficient and an “improved” rank-sum statistic

12

sg28.

Multiple comparisons of categories after regression-like methods

15

snp7.

Natural cubic splines

19

ssa6.

Utilities for survival analysis with time-varying regressors

22

sss1.1.

Updated U.S. marginal income tax rate function

29

sts7.4.

A library of time series programs for Stata (Update)

29

zz3.6.

Computerized index for the STB (Update)

31



More intriguing information

1. Integration, Regional Specialization and Growth Differentials in EU Acceding Countries: Evidence from Hungary
2. Name Strategy: Its Existence and Implications
3. Labour Market Flexibility and Regional Unemployment Rate Dynamics: Spain (1980-1995)
4. Announcement effects of convertible bond loans versus warrant-bond loans: An empirical analysis for the Dutch market
5. Mortality study of 18 000 patients treated with omeprazole
6. CAPACITAÇÃO GERENCIAL DE AGRICULTORES FAMILIARES: UMA PROPOSTA METODOLÓGICA DE EXTENSÃO RURAL
7. The name is absent
8. Behavior-Based Early Language Development on a Humanoid Robot
9. IMPROVING THE UNIVERSITY'S PERFORMANCE IN PUBLIC POLICY EDUCATION
10. Inflation Targeting and Nonlinear Policy Rules: The Case of Asymmetric Preferences (new title: The Fed's monetary policy rule and U.S. inflation: The case of asymmetric preferences)
11. The name is absent
12. Tastes, castes, and culture: The influence of society on preferences
13. A Multimodal Framework for Computer Mediated Learning: The Reshaping of Curriculum Knowledge and Learning
14. Ultrametric Distance in Syntax
15. The name is absent
16. PRIORITIES IN THE CHANGING WORLD OF AGRICULTURE
17. A Brief Introduction to the Guidance Theory of Representation
18. CURRENT CHALLENGES FOR AGRICULTURAL POLICY
19. Are combination forecasts of S&P 500 volatility statistically superior?
20. Cardiac Arrhythmia and Geomagnetic Activity