Table AI.

Constructs and questionnaire insights

Commitment*
Comm1We want to stay a supplier of this customerHüttinger (2014) 
Comm2We want to support a long-term relationship with this customer
Comm3We maintain the relationship with this customer for a long time
Comparative customer*
CompC1The cooperation with this customer is far betterHüttinger (2014) 
CompC2This customer is supporting us better administratively
CompC3Working with this customer is much easier than with others
Trust*
Trust1This customer can be trustedHuman and Naudé (2014) 
Trust2We rely on this customer to do/decide what is right
Trust3This customer has high integrity and loyalty
(Defense) Customer attractiveness*
Attract1This customer secures our competitive positionLa Rocca et al. (2012) 
Attract2This customer enables us to develop new market potentials
Attract3This customer could hardly be replaced
Preferential customer treatment*
PrefT1We inform this customer first about new ideasHüttinger (2014) and Pulles et al. (2016) 
PrefT2We allocate scarce resources to this preferred customer
PrefT3We share more know-how with this customer than with others
PrefT4This customer is our preferred customer
Control variables**
PositionWhat is your current company position?
MilCareerHave you been in military service before your career in this company?
GenderPlease provide gender information

Notes:

*

Measured with a six-point Likert scale ranging from 1 “totally disagree” to 6 “totally agree”;

**

measured with a set of choice options, please see Table I for the alternatives and details

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