The Effect of Jet Fuel Tax Changes on Air Transport, Employment, and the Environment in the US This paper presents an analysis of the effects of jet fuel taxes on air traffic, employment and emissions using a difference-in-difference design. These findings are relevant, as US airports identify...
the differences of gained scores between the two intervention groups and control group were 18.8 and 16.8 respectively.ConclusionBoth sex education models could increase the sexual and reproductive health knowledge of high school students.Different sex education model had different effects on students of ...
Due to the high cost, low frequency and technical difficulties of space experiments, ground-based simulated microgravity (SM) models have been established. Rodent tail-suspension (TS) is a validated one to mimic multiple effects of real microgravity on organism and used to investigate the involved...
The difference in converted land area between the two simulations is 258,300 km2. Figure 1b shows how the marginal value of converted land evolves over the time path of land conversion activity and land conversion for both scenarios. In steady state, the marginal value of converted land for ...
effects. Lastly, in medical consumption, the one-time payment and ongoing hospitalization costs of the elderly population constitute a significant proportion of healthcare expenses. While the carbon intensity of healthcare is not as high as that of industry, the production of medical equipment and ...
The former is a difference specification estimated by OLS and the latter uses system GMM to account for endogeneity of e-commerce activities. For the impact analysis e-commerce is narrowed down to e-sales, measured as the percentage of firms receiving orders online (EDI or websites) or as ...
摘要原文 Purpose The ESG factor, which consists of environmental, social, and governance factors, represents the non-financial performance of a company. United Nations Principles for Responsible Investment invites investors to consider ESG issues when evaluating the performance of any company. Moreover,...
Leveraging macro-city data from 2003 and 2020 and micro-enterprise data from 2003 and 2012, we employ the traditional and spatial difference-in-difference method to identify the net effects and spatial overflow impacts of HSR on environmental sustainability. Meanwhile, we investigate the mechanism ...
Ψ in tree crowns on the day of the cut did not show any difference compared to control in Picea and became less negative in Fagus around 2 p.m. (Fig. 2c). Also during the following days after the cut, Ψ of both species did not drop to more negative values than in the control ...
Furthermore, an analysis of the difference between the innovative groups differentiated by online synchronous and blended teaching revealed that compared with live broadcast teaching (Class A in 2022), online blended teaching with flipped classroom using case studies (Class B in 2022) (B = 2.53...