Regression estimates for the localization of idea proximity, which represents how many S.D.s more similar patents within cluster (location-technology field) are compared to across clusters.

Standard errors of estimates are reported in parenthesese below. A separate sample is computed for each definition of technology field at the industry and primary class level.

估计值的标准误差将在下文中以括号标注。针对行业及一级分类层面的各项技术领域定义，均会单独计算一组独立样本。