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2.4. ANALYSES 37<br />

2.4 Analyses<br />

This section presents the analyses. I test the hypotheses by using multivariate regression<br />

analysis 20 . The hypothesized main and interaction-effect variables are included as<br />

described previously. All interactions between information asymmetry and its moderator<br />

(i.e., comparability) as well as the independent variable interaction between uncertainty<br />

and information asymmetry are calculated as multiplicative interactions (Gerdin & Greve<br />

2008). Interaction effects are calculated by using the following procedure. First, all of the<br />

terms are standardized 21 . Then the terms are multiplied and added to the model.<br />

In addition to the hypothesized main and interaction-effects, the statistical model consists<br />

of control variables (concerning contractibility, emphasis on firm-level measures, size and<br />

sector) and the unhypothesized main-effects of comparability and information asymmetry<br />

on RPE use. These main effects are included to ensure that the significant coefficients for<br />

the interaction effects are not caused by lower-order effects (see also: Hartmann & Moers<br />

1999, Echambadi et al. 2006). The result is the statistical model presented in figure 2.3.<br />

Overall, the regressions analyses provide mixed results with regard to the explanations of<br />

organizational reliance on RPE. The noise-based hypothesis (H1) is robustly supported,<br />

but the opportunism-based hypothesis (H2) and the joint effects of both perspectives (H3)<br />

yield inconsistent findings.<br />

Before discussing the regression analyses in detail, the remainder of this section describes<br />

the prevalence of RPE amongst business unit managers and the correlations among the<br />

variables.<br />

2.4.1 Empirical Results: the Use of RPE amongst <strong>Business</strong> Unit<br />

Managers<br />

One of the goals of this study is to explore the use of RPE amongst business unit managers,<br />

as formalized in the introductory chapter of this thesis as the first research question. The<br />

answer to this first research question is discussed in the current subsection, which presents<br />

the extent to which RPE is used within the sample. Moreover, this subsection describes<br />

additional design characteristics of RPE use.<br />

20 For the multivariate analyses, I use EViews 6.<br />

21 Standardization and/or mean-centring of interaction terms is often used to alleviate multicollinearity<br />

problems, as recommended by Cronbach (1987) and Aiken & West (1991). According to Echambadi<br />

& Hess (2007), this is not a useful procedure. Echambadi & Hess analytically show that these linear<br />

transformations do not reduce the potential threat of multicollinearity. Rather, I used standardization<br />

to solve the inequality of scale-variances to prevent undesired weightings of the individual terms in the<br />

multiplied interaction construct.

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