The threat of global climate change has caused the international community to pay close attention to atmospheric levels of greenhouse gases such as carbon dioxide. Transportation sector carbon dioxide emissions efficiency (TSCDEE) is a key indicator used to prioritize sustainable development in the transportation sector. In this paper, the epsilon-based measure data envelopment analysis model with undesirable outputs is applied to estimate TSCDEE for 30 provinces in China from 2010 to 2016. We also analyze influencing factors using the spatial Durbin model. Research shows that the overall TSCDEE of the Chinese provinces studied was 0.618, indicating that most regions are still in need of improvements. The provinces with the highest TSCDEE are located in developed coastal regions of China. This study shows that factors such as transportation structure, traffic infrastructure level, and technological progress have prominent positive effects on TSCDEE, while both urbanization level and urban population density exert significantly negative effects on TSCDEE. The findings should have a far-reaching impact on the sustainable development of global transportation.

Recently, place branding has received increasing attention from both academic and policy circles. As place branding is an interdisciplinary field, scholars from different backgrounds have contributed to the research. Previous literature review studies have summarized the key disciplines in place branding fields, including urban studies, marketing, tourism, and public management. The goal of this work is to examine the impact of influencing factors on the case selection pattern in place branding literature from 2014 to 2018. First, we raise seven hypotheses about the case selection mechanism from perspectives of branding strategies (public management field), marketing strategies (marketing field), urban characteristics (urban studies), tourism attraction (tourism field), and scholar proximity (other factors), respectively. Second, we test the proposed hypotheses in aggregated cases and comparative cases using Poisson regression and qualitative comparative analysis. We found that the previous focus of city branding study was on Europe, and more attention has started to be paid to North America, Asia, and Oceania in the last 5 years. As for influencing factors, we observe that the scholar proximity is significantly related to the case selection, while urban characteristics, branding strategies, marketing strategies, and tourist attractions are less influential.