Was Robert Gibrat right? A test based on the graphical model methodology
用回归分析和图形模型方法检验吉布拉特定律，发现全样本拒绝该定律，但存活的高效企业符合定律，调和了早期与近期文献，对中小企业补贴政策有启示。
Abstract Using both regression analysis and an unsupervised graphical model approach (never applied before to this issue), we confirm the rejection of Gibrat’s Law (stating that a firm’s growth is independent of that firm’s initial size) when our firm-level data are considered over the entire investigated period, while the opposite is true when we allow for market selection; indeed, the growth behavior of the surviving most efficient firms is in line with Gibrat’s Law. This evidence reconciles early and current literature and may have interesting implications in terms of both theoretical research and policy suggestions regarding subsidies to small firms, which do not necessarily grow faster than their larger counterparts.