Summary of the prevalence of each of the eight possible procurement activity profiles.

In bold, the profiles with a high prevalence and which are discussed in more detail in the main text. Each profile is characterized by the sign of the SAI in each of the procurement categories: Services; Goods; and Works. The prevalence corresponds to the fraction of observations (i.e., fraction of municipalities) in such profile. The four identified profiles—I, II, III, and IV—account for approximately 66% of the observations.以粗体标注的为高占比特征概况，且将在正文中展开详细讨论。每份特征概况均通过三类采购类别（服务、货物及工程）下的SAI（SAI）的符号特征进行表征。占比指该特征概况对应的观测样本（即市政单位）在总样本中的占比。本次识别出的四类特征概况——I、II、III与IV——合计覆盖约66%的观测样本。