Covin & Miles have also presented a definition of Corporate Entrepreneurship:
Corporate entrepreneurship necessarily implies the presence of innovation, but there is more to corporate entrepreneurship than innovation.
Innovation refers to the introduction of a new product, process, technology, system, technique, resource or capability to the firm or its market. [1]
Finally, Sharma & Chrisman also give us a synthetic overview on different terms:
Corporate entrepreneurship
organizational creation, renewal or innovation
+ instigated by an existing organizational entity
Innovation
introduction of something new to marketplace
+ potential to transform competitive environment and organization
+ usually occurring in concert with corporate venturing or strategic renewal
Internal corporate venturing
organizational creation
+ instigated by an existing organizational entity
+ treated as new businesses
+ reside within existing organizational domain [2]
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Bibliographical references:
[1] Corporate entrepreneurship and the pursuit of competitive advantage
Jeffrey G. Covin, Morgan P. Miles, In: Entrepreneurship theory and practice, 1999
[2] Toward a reconciliation of the definitional issues in the field of Corporate Entrepreneurship
Pramodita Sharma, James J. Chrisman, In: Entrepreneurship theory and practice, 1999