质性研究中的案例选择方法是《社会研究设计》(下文简称《设计》)一书所关注的一个重要问题。从量化研究对选择偏误(selection bias)的讨论出发,该书探讨了在质性研究中如何借用相似的逻辑来避免或降低选择偏误的影响。科利尔从这一角度出发,对原书的相关论述进行了探讨、深化及修正。具体来说,在简要介绍选择偏误的基本概念 The method of case selection in qualitative research is an important issue of concern in the book Social Designing (“Design”). Starting with the discussion of selection bias in quantitative studies, the book explores how similar logic can be borrowed in qualitative studies to avoid or reduce the effects of selection bias. From this perspective, Collier explored, deepened and amended the related discourse of the original book. Specifically, we briefly introduce the basic concepts of selection bias