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Ride-hailing data is sparingly available throughout the U.S., which limits researchers’ understanding of the mode. Chicago is one of a few cities that have mandated ride-hailing companies to submit detailed trip data to their local transportation agency. The dataset is one of the few to contain trip-level attributes such as fare, travel time, and trip length. Most research using the Chicago dataset has focused on understanding why people use ride-hailing. This study focuses on why ride-hailing passengers choose shared over private trips and what influences the shared trips to be matched. Trips to/from airports are less likely to be shared. Trips to/from low-income areas are more likely to be shared. Longer shared trips are more likely to be matched, shared trips to/from dense areas are more likely to be matched, and shared trips between areas with a high number of shared trips are more likely to be matched. Matching an additional shared trip with another adds approximately 4 min to a trip. Ride-hailing users’ value of time is found to be $48.23 per hour. Understanding travel behavior is important for all modes of transportation including ride-hailing. The results of this paper can be applied to guide polices aiming to promote more sustainable transportation modes.

•First-postoperative day (POD) serum albumin is a predictor of complications in head and neck surgery.•First-POD albumin <2.8 g/dl increases the risk of postoperative complications.•Non-complicated patients normalize serum albumin more often and five times more rapidly.

•Identification of critical risk factors that impact supply chains of large-scale projects•A mathematical model developed that establishes the prioritization of supplies of critical equipment throughout the lifecycle of Large-scale projects.•Managers and organizations can adopt this solution as a practical and dynamic tool to support decision-making in the definition of possible critical supply scenarios.

The poem "I've Been Fire," by Richard Alex Jensen is presented. First Line: I've been fire, I've been smoke, Last Line: marrow, sinew, muscle, bone.

The poem "I've Been Fire," by Richard Alex Jensen is presented. First Line: I've been fire, I've been smoke, Last Line: marrow, sinew, music, bone.

Several letters to the editor are presented in response to the article that was published in previous issue of the periodical including "Is There Detroit After Bankruptcy?," in the September 2013 issue and "Girls Don't Just Want to Have Fun," in the September 2013 issue.