This paper examines co-operative marketing strategies among clustered-based firms in the most important wine producing and exporting countries in the 'new world'. The research examines the development of active inter-firm marketing co-operation undertaken by firms to achieve competitive positioning in international markets. The results of a survey of managers located in Argentina, Australia, Chile and New Zealand are presented. The empirical contribution comes from the unique comparative data from regional clusters in four countries which are seen internationally as innovative producers and marketers, all strongly export-oriented, but at different stages of economic development and positioning in the global marketplace. In addition, this study makes a significant contribution to agglomeration theory by confirming the importance of sharing marketing knowledge to build sustainable competitive advantage in international markets. The theoretical contribution builds understanding of international marketing strategies within the Southern Hemisphere group of emerging countries and offers new insights on international marketing practices for emerging firms from both the developed economies in the Pacific Ocean region and Latin American emerging economies. (C) 2013 Elsevier Inc. All rights reserved.