“…With the growing popularity of crowdfunding, scholars have done much research and analysis from different perspectives (Zhao et al 2019;Liu et al 2017;Zhao et al 2017a;Zhang et al 2019b). Most of the previous works could be grouped into three categories: analyzing the influential factors (Burtch, Ghose, and Wattal 2013;Kuppuswamy and Bayus 2017;Mollick 2014;Hoegen, Steininger, and Veit 2018), predicting the funding results (i.e., success of failure) (Li, Rakesh, and Reddy 2016;Lee, Lee, and Kim 2018;Yu et al 2018;Zhang et al 2019a;Kaminski and Hopp 2019) and tracking the funding dynamics (Zhao et al 2017b;Ren et al 2018), etc. Among qualitative factors, what should be mentioned is that some scholars are committed to exploring the social effects in crowdfunding, especially the "Herd Effect" and the "Goal Gradient Effect" (Shen, Krumme, and Lippman 2010;Herzenstein, Dholakia, and Andrews 2011;Kuppuswamy and Bayus 2017), which uncovers a typical and significant pattern in funding series, i.e., U-shaped pattern.…”