A Study of the Impact ofIndividual Differences and Environmental Characteristics on Business Growth and Efficiency. The purpose of this thesis is to present and evaluate a model of entrepreneurial performance, and to study how entrepreneurial performance affects business growth and business efficiency.

It is based on several empirical studies, and presented in six papers. In the introduction the theoretical background is given along with a definition of the studied area. Emphasis is thereafter placed on earlier research on entrepreneurial behavior from a psychological perspective. It is followed by a review of motivation theories. The roles of interests and intrinsic motivation are especially discussed. Mental testing and theories on cognitive ability are also commented upon. The empirical papers are then summarized.

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