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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

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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
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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



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4. Revisiting The Bell Curve Debate Regarding the Effects of Cognitive Ability on Wages
5. Optimal Taxation of Capital Income in Models with Endogenous Fertility
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7. The name is absent
8. The name is absent
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10. Clinical Teaching and OSCE in Pediatrics
11. The name is absent
12. Rent Dissipation in Chartered Recreational Fishing: Inside the Black Box
13. European Integration: Some stylised facts
14. The name is absent
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16. Education Responses to Climate Change and Quality: Two Parts of the Same Agenda?
17. The effect of globalisation on industrial districts in Italy: evidence from the footwear sector
18. The Impact of Minimum Wages on Wage Inequality and Employment in the Formal and Informal Sector in Costa Rica
19. Consumption Behaviour in Zambia: The Link to Poverty Alleviation?
20. On the Real Exchange Rate Effects of Higher Electricity Prices in South Africa