Milena Ratajczak-Mrozek is Associate Professor at the Poznań University of Economics and Business, Poland. She is an Outstanding Young Scientist holder of the Minister of Science and Higher Education scholarships and member of the board of Industrial Marketing and Purchasing Group. Her main areas of research include companies’ relationships and networks in international settings.

• 1. Introduction.- 2. The Essence of the Network Approach.- 3. Relationships and Interactions as the Basis of Companies' Activities.- 4. Three Perspectives of Companies' Embeddedness.- 5. The Importance of Embeddedness for Companies' Activities - Perspective of Relationships and Interactions.- 6. The Network Theory of Companies' Internationalization - The Importance of Relationships for International Expansion.- 7. The Importance of Embeddedness for Companies' International Activities.- 8. Methodology of the Empirical Studies.- 9. Positive and Negative Outcomes of Embeddedness for the Domestic and International Activity - Results of Case Studies Analysis.- 10. The Importance of Relationships and Embeddedness for Companies' Internationalization and Performance - Results of Quantitative Study.- 11. Conclusions.

Milena Ratajczak-Mrozek is Associate Professor at the Poznań University of Economics and Business, Poland. She is an Outstanding Young Scientist holder of the Minister of Science and Higher Education scholarships and member of the board of Industrial Marketing and Purchasing Group. Her main areas of research include companies’ relationships and networks in international settings.

• 1. Introduction.- 2. The Essence of the Network Approach.- 3. Relationships and Interactions as the Basis of Companies' Activities.- 4. Three Perspectives of Companies' Embeddedness.- 5. The Importance of Embeddedness for Companies' Activities - Perspective of Relationships and Interactions.- 6. The Network Theory of Companies' Internationalization - The Importance of Relationships for International Expansion.- 7. The Importance of Embeddedness for Companies' International Activities.- 8. Methodology of the Empirical Studies.- 9. Positive and Negative Outcomes of Embeddedness for the Domestic and International Activity - Results of Case Studies Analysis.- 10. The Importance of Relationships and Embeddedness for Companies' Internationalization and Performance - Results of Quantitative Study.- 11. Conclusions.

Milena Ratajczak-Mrozek is Associate Professor at the Poznań University of Economics and Business, Poland. She is an Outstanding Young Scientist holder of the Minister of Science and Higher Education scholarships and member of the board of Industrial Marketing and Purchasing Group. Her main areas of research include companies’ relationships and networks in international settings.

• 1. Introduction.- 2. The Essence of the Network Approach.- 3. Relationships and Interactions as the Basis of Companies' Activities.- 4. Three Perspectives of Companies' Embeddedness.- 5. The Importance of Embeddedness for Companies' Activities - Perspective of Relationships and Interactions.- 6. The Network Theory of Companies' Internationalization - The Importance of Relationships for International Expansion.- 7. The Importance of Embeddedness for Companies' International Activities.- 8. Methodology of the Empirical Studies.- 9. Positive and Negative Outcomes of Embeddedness for the Domestic and International Activity - Results of Case Studies Analysis.- 10. The Importance of Relationships and Embeddedness for Companies' Internationalization and Performance - Results of Quantitative Study.- 11. Conclusions.