Background: Traditionally defined boundaries and borders between organizations are at present being re-evaluated because of new and tougher demands. Today we can see a trend where these boundaries are being lowered or even eliminated when organizations choose to co-operate instead of compete. Purpose: In order to create an understanding for the partner selection process in the newly founded joint ventures between the companies which are building the Swedish 3G Network, the determining factors are being studied. Delimitation: The studies companies are co-operating as network operators but are at the same time competing as mobile operators. This relationship is in the literature described as co-opetition, which will not be investigated in this paper. Realization: Taking our starting point in Geringer’s task- and partner-related approach, a simple model has been created for the task. Empirical data have been collected through interviews, and have been analyzed with this model. Results: Essentially the same factors have been found determining for the companies which have committed themselves for co-operation. These factors do however tend to differ partly between the two joint ventures that have been founded. In the Europolitan Vodafone” Hi3G joint venture, compatibility between top management and culture&structure seem to be the motivating factors. From a Telia - Tele2-perspective, the mutual factors seem to be financing and compatibility between top management. An important criterion has in both joint venture constellations to the access to existing real capital and infrastructure as well as having existing customers.

<p>Background: Traditionally defined boundaries and borders between organizations are at present being re-evaluated because of new and tougher demands. Today we can see a trend where these boundaries are being lowered or even eliminated when organizations choose to co-operate instead of compete. </p><p>Purpose: In order to create an understanding for the partner selection process in the newly founded joint ventures between the companies which are building the Swedish 3G Network, the determining factors are being studied. </p><p>Delimitation: The studies companies are co-operating as network operators but are at the same time competing as mobile operators. This relationship is in the literature described as co-opetition, which will not be investigated in this paper. </p><p>Realization: Taking our starting point in Geringer’s task- and partner-related approach, a simple model has been created for the task. Empirical data have been collected through interviews, and have been analyzed with this model. </p><p>Results: Essentially the same factors have been found determining for the companies which have committed themselves for co-operation. These factors do however tend to differ partly between the two joint ventures that have been founded. In the Europolitan Vodafone” Hi3G joint venture, compatibility between top management and culture&structure seem to be the motivating factors. From a Telia - Tele2-perspective, the mutual factors seem to be financing and compatibility between top management. An important criterion has in both joint venture constellations to the access to existing real capital and infrastructure as well as having existing customers.</p>