“…In addition to such regulator-side studies, an increasing number of driver-side studies emerged in the wake of available taxi GPS data (Cao et al, 2005;Huang et al, 2015;Li et al, 2009;Veloso et al, 2011;Yuan et al, 2013;Zheng et al, 2011;Zheng et al, 2009). Some of them specifically focused attentions on the low-income problem and intended to seek underlying crowd intelligence from GPS patterns, in which several factors affecting incomes were explored respectively, including duration and distance (Liu et al, 2010;Sirisoma et al, 2010) of passenger search/delivery, fare (Liu et al, 2010), likelihood of pickups (Qu et al, 2014;Rong et al, 2016), operational region (Dong et al, 2016;Gao et al, 2012;Zhang et al, 2015), ridership (Gao et al, 2012, and delivery speed (Zhang et al, 2015). Despite abundant factors, there is little knowledge of how much these factors will affect the income level, hence unknown significance of each factor.…”