Market Share Dynamics and the “Persistence of Leadership” Debate
利用日本45个行业23年的新数据集，研究行业领导地位的持续时间，发现市场份额变化的标准差与当前市场份额之间存在新的标度关系，该关系能有效区分市场份额动态的竞争理论模型，并简化马尔可夫基准模型的检验。
A new 45-industry, 23-year, dataset for Japan is used to investigate the duration of industry leadership. A new scaling relationship linking a firm's current market share with the standard deviation of market share changes is reported. This relationship discriminates in a powerful way between rival candidate theoretical models of market share dynamics. It also makes possible a useful simplification in testing a benchmark model of a Markovian kind. Relative to that model, it is found that at least some industries display a “Chandlerian” bias toward longer durations of leadership than would be present in the benchmark model.