WHEN DO STRATEGIC ALLIANCES CREATE SHAREHOLDER VALUE

This article reports the findings of the authors' study of the stock market reaction to 345 strategic alliances announced during the period 1983-1992. The study reports statistically significant gains that, when translated into dollars, are divided roughly evenly between the larger and smaller partners (though the smaller partners experience larger percentage gains). Moreover, the value gains are largest in those cases in which two high-tech firms ally to develop or apply new technology, while the market shows less enthusiasm for non-technical or marketing alliances. 1999 Morgan Stanley.