Abstract
Analyzing the competitive dynamics of strategic alliances requires the development of original specific qualitative research tools. We propose a qualitative method for longitudinal analysis which integrates the three traditional dimensions of strategy – the market, market structures and the non-market environment – plus an additional dimension specific to alliances : inter-market relationships. We explain how to use the SMAA – Sequential and Multidimensional Analysis of Alliances – before applying it to the European railway sector. Compared to the traditional qualitative methods, the SMAA allows highlighting the dynamics of alliance portfolio effects resulting from the multiplication of points of contact between partners and competitors.