Revisiting shape and moderation effects in curvilinear models

Assaf, A. George and Tsionas, Mike G. (2019) Revisiting shape and moderation effects in curvilinear models. Tourism Management, 75. pp. 216-230. ISSN 0261-5177

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Abstract

Testing hypotheses using curvilinear models in the form of U-shaped, inverted U-shaped or S-shaped relationships has increased considerably over the last decade. However, researchers in the field continue to make common mistakes in analysing such models; for example, ignoring important steps in validating the shape (e.g. U-shape) of a curvilinear relationship, or failing to properly test for different types of moderation. In this paper, following Haans, Pieters, and He (2016), we aim to provide clear guidelines on how to properly test and theorize for shape and moderation effects in curvilinear models. We provide illustrations from different contexts, including U-, inverted U- and S-shaped relationships. We also describe a new procedure that simplifies the process of testing within such contexts. The simplification works for both theoretical derivations as well as for the computation of marginal and moderation effects and curvature.

Item Type:
Journal Article
Journal or Publication Title:
Tourism Management
Additional Information:
This is the author’s version of a work that was accepted for publication in Tourism Management. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Tourism Management, 75, 2019 DOI: 10.1016/j.tourman.2019.05.007
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3300/3313
Subjects:
ID Code:
150536
Deposited By:
Deposited On:
07 Jan 2021 11:15
Refereed?:
Yes
Published?:
Published
Last Modified:
24 Jul 2021 05:33