Modeling Discontinuous and Nonlinear Change

Judith D. Singer and John B. Willett

in Applied Longitudinal Data Analysis

Published in print May 2003 | ISBN: 9780195152968
Published online September 2009 | e-ISBN: 9780199864980 | DOI:
Modeling Discontinuous and Nonlinear Change

Show Summary Details


This chapter introduces strategies for fitting models in which individual change is explicitly discontinuous or nonlinear. Section 6.1 begins by describing ways of incorporating abrupt discontinuities into the individual change trajectory. Section 6.2 shows how transformation of either the outcome or TIME can lead to a multilevel model for linear change based on the transformed variable(s). Section 6.3 extends this basic idea by specifying trajectories that are polynomial functions of TIME. Section 6.4 concludes by surveying several models for individual change in which the outcome is an explicit nonlinear function of the growth parameters.

Keywords: models; nonlinear individual change; TIME; discontinuities

Chapter.  18300 words.  Illustrated.

Subjects: Public Health and Epidemiology

Full text: subscription required

How to subscribe Recommend to my Librarian

Buy this work at Oxford University Press »

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.