Joint ventures (JVs), defined as independent organizations formed by the pooling of resources and sharing of equity by two or more firms, are being formed at an increasingly rapid pace. While much empirical research has examined the conditions which favor the formation of JVs, less attention has been paid to the equally important issues of control and implementation which are the focus of interest in this study. We identify two factors which are expected to influence the design of control mechanisms, i.e., (1) the strategic interdependence between the JV and each parent and (2) the environmental uncertainty faced by the JV. Our empirical examination confirms the importance of the degree of strategic interdependence and the moderating role of environmental uncertainty in explaining the design of control mechanisms. © 1998 John Wiley & Sons, Ltd.