Purpose: The main purpose of this study was to compare the phenomenon of interfirm cooperation strategy in both hyper-growth, and stable-growth knowledge and technology-intensive firms, in a country characterized by a high level of generalized trust: Sweden. Methodology: Qualitative methods were incorporated: direct semistructured interviews with top managers in 13 ICT firms (8 hyper-growth and 5 stable-growth), analyzis of reports, corporate websites and press releases. Furthermore, interviews

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... in 3 expert firms in the industry were conducted, facilitating interfirm cooperation. Conclusions: There were significant differences in interfirm cooperation strategy in two distinguished groups of the firms: hyper-growth, and stable-growth. Managers' individual approaches to uncertainty, strategy and cooperation might be more important than institutional settings. The ICT firms operate in a constantly changing global environment and local context seems to have only a minor impact on the rules of the game in the industry. Research limitations: This study was a qualitative explorative approach as an introduction to further empirical research. Originality: The study presents an interfirm cooperation phenomenon incorporating different perspectives and settings. It contributes to alliance portfolio literature (forming and managing of alliance portfolio in a different context/country/industry), and enhances understanding of firm strategies characterized by different growth rates.