Adjusting period tempo changes with an extension of Ryder's basic translation equation.

Journal Article (Journal Article)

We show that the observed changes in the period tempo of fertility are biased and derive a new formula for adjusting such bias. We present illustrative applications of our proposed method to the cases of the United States and Taiwan. We then describe the relevance of adjustments of observed period fertility tempo for evaluating family planning programs aiming at delaying and reducing births to slow down population growth in developing countries. The work reported in this article also can be regarded as an extension of Ryder's basic translation equation. The extension provides a set of formulas expressing relationships of quantum-tempo between cohorts and periods under specified assumptions.

Full Text

Duke Authors

Cited Authors

  • Zeng, Y; Land, KC

Published Date

  • May 2002

Published In

Volume / Issue

  • 39 / 2

Start / End Page

  • 269 - 285

PubMed ID

  • 12048952

International Standard Serial Number (ISSN)

  • 0070-3370

Digital Object Identifier (DOI)

  • 10.1353/dem.2002.0022


  • eng

Conference Location

  • United States