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Abstrct. Controlis a criticalconceptfor successfulmanagement andperformanceof international joint ventures(IJUs).This paper reviewsandsynthesizespriorstudiesaddressingthe conceptualization and operationalizationof controlwithin IJVs,as well as the IJV control-performance relationship.The paperalso presentsa newconceptualization of IJVcontrol,as wellas a conceptual framework for studyingcontrol of IJVs. THEIMPORTANCE OF CONTROL

This paper examines the relationship of performance with product and international diversification on Japanese multinational firms from 1977 to 1993. We show the relationships between diversification and performance change over time through the use of multiple time periods and accounting for keiretsu membership. Results show that while diversity strategies vary between keiretsu and non‐keiretsu firms, performance is not much different. Across time periods, performance varies considerably, but strategies are less variable. Product diversity has weak effects on firm performance only in one time period, while international diversification has negative profitability and positive growth consequences in in some periods. These results suggest first that diversification strategies and their effects on performance vary across time periods and generally produce some unexpected findings. We do not find strong interactive diversity effects. Copyright © 2000 John Wiley & Sons, Ltd.

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In a control-group field experiment using a reversal design, 30 insurance salespeople were randomly assigned to an experimental group that received self-management training. A multivariate analysis of variance and subsequent repeated-measures analyses of variance revealed that, compared with a control condition (n = 30), training in self-management skills significantly improved job performance as assessed through both objective and subjective measures. Performance improvement continued with time, and increases were sustained across a 12-month period posttraining. Subsequent training of the control group produced similar increases in self-efficacy, outcome expectancies, and job performance. Potential mediating effects of self-efficacy and outcome expectancies on the self-management-performance relationship were explored and partially supported.