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30 CHAPTER 2. RPE AT THE BUSINESS UNIT MANAGER LEVEL<br />

measure environmental uncertainty with one multi-item construct. The measure for environmental<br />

uncertainty is calculated as the mean of the six items 16 .<br />

Table 2.3: Items for Environmental Uncertainty (Q4-7)<br />

Item description<br />

Component<br />

loadings (1)<br />

Component<br />

loadings (2)<br />

a. External factors influencing business<br />

unit performance<br />

0.544 0.472<br />

b. Unpredictable variation<br />

amount of work<br />

in the<br />

0.667 -0.215<br />

c. Number of exceptions that arise in<br />

the unit<br />

0.689 -0.496<br />

d. Differences in day-to-day situations 0.682 -0.423<br />

e. Need to react to outside pressure 0.672 0.326<br />

f. Long-range planning hindered by<br />

unpredictable events<br />

0.602 0.495<br />

Percentage variance explained 41.6% 17.4%<br />

Cronbach’s alpha 0.712<br />

However, by measuring environmental uncertainty, I measure both common uncertainty<br />

and idiosyncratic uncertainty. Therefore, the idiosyncratic part has to be filtered out of<br />

the uncertainty measure. To separate common from idiosyncratic uncertainty, I use information<br />

about how common the business unit is, compared to its peers. The logic behind<br />

this is the following: consider a very unique business unit, with assets that none of its peers<br />

has. For example, it has highly specific equipment, a high-profile brand image, and/or a<br />

highly diversified client portfolio, non of which its peers have. If an external event occurs<br />

that affects performance, it is likely that this event affects only this business unit and does<br />

not influence its peers, because its peers use different assets that affect performance in a<br />

likely different manner. Vice versa, if a highly comparable business unit, using common<br />

assets, faces external influences that affect its performance, it is likely that, besides the<br />

own performance also the performance of peers (who operate in more-or-less similar ways,<br />

using more-or-less similar assets) is affected by the event.<br />

To measure how common the business unit is compared to other business units inside<br />

or outside of the firm, I develop a measure labelled ‘comparability of the business unit’.<br />

Comparability of the business unit is discussed in the next section.<br />

16 Before calculating the mean score, 7-point scales are recoded to 5-point Likert scales, to prevent<br />

overrepresentation of the 7-point scaled items in the uncertainty construct.

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