Replication data for: Market Share Dynamics and the "Persistence of Leadership" Debate

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. (JEL D43, L13)

本文采用一套覆盖45个行业、时间跨度达23年的全新日本行业数据集，用以探究行业领军地位的持续时长。本文报告了一种全新的标度关系，该关系将企业当期市场份额与市场份额变动的标准差相关联。该标度关系可有力区分关于市场份额动态演化的各类竞争性候选理论模型，同时还可简化马尔可夫（Markovian）类基准模型的检验流程，具备显著实用价值。相较于该基准模型，研究发现至少部分行业呈现出钱德勒式（Chandlerian）偏差：其领军地位的持续时长较基准模型的预设情形更长。（JEL D43, L13）