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M. Schwaiger<br />

Table 4: Results <strong>of</strong> the Principal Component Analysis<br />

component analysis to “bundle” correlated items to possible index constructs.<br />

Principal component analysis on the complete data set revealed four factors with<br />

an eigenvalue > 1, which explain 63.95% <strong>of</strong> the original information 73.<br />

Factor 1 contains attributes which denote premium supplier, among others quality,<br />

service <strong>and</strong> customer orientation. For reasons <strong>of</strong> simplicity, we name this factor<br />

quality. Factor 2 contains many attributes that are predominant in Fortune <strong>and</strong><br />

ManagerMagazin rankings. These attributes are strongly tied to the performance<br />

73 Factor structures remain stable, even when using other rotation algorithms. Calculating reliability<br />

indicators would require reflective items, so we omitted to state Cronbach’s α.<br />

62 <strong>sbr</strong> 56 (1/2004)

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