Results 91 to 100 of about 96,274 (254)

Estimating Causal Effects With Observational Data: Guidelines for Agricultural and Applied Economists

open access: yesJournal of Agricultural Economics, EarlyView.
ABSTRACT Most research questions in agricultural and applied economics are causal in nature: they study how changes in one or more variables (such as policies, prices or weather) affect one or more other variables (e.g., income, crop yields or pollution).
Arne Henningsen   +6 more
wiley   +1 more source

Coping with uncertainty in the inland navigation market: the impact of climate change [PDF]

open access: yes
Low water levels are a potential threat to the inland navigation market. We develop a theoretical model to analyze low water-level uncertainty in the inland navigation market. A negative effect of climate change on welfare is expected due to the increase
Erhan Demirel   +2 more
core  

Re-assessing the radial-velocity evidence for planets around CoRoT-7

open access: yes, 2010
CoRoT-7 is an 11th magnitude K-star whose light curve shows transits with depth of 0.3 mmag and a period of 0.854 d, superimposed on variability at the 1% level, due to the modulation of evolving active regions with the star's 23 d rotation period.
Aigrain   +52 more
core   +1 more source

Network Structure and the Efficiency Gains from Mergers: Evidence from U.S. Freight Railroads

open access: yesThe RAND Journal of Economics, EarlyView.
ABSTRACT The trade‐off between market power and efficiency gains is central to antitrust analyses of mergers, but empirical evidence quantifying efficiencies remains limited. Using transaction‐level data from U.S. freight railroads (1985–2005), this article quantifies merger‐induced cost efficiencies, driven mainly by eliminating inter‐railroad ...
Yanyou Chen
wiley   +1 more source

Anholocyclic overwintering of Myzus persicae: Host plant selection as a driver for aphid performance and survival

open access: yesAnnals of Applied Biology, EarlyView.
The green peach aphid, Myzus persicae, is the main virus vector in sugar beet. We examine its performance on potential winter hosts as well as the host selection and overwintering success of anholicyclic aphids in order to improve forecasting models for virus outbreaks through targeted monitoring of suitable winter hosts. Abstract Virus yellows (VY) is
Mohamed Matared   +2 more
wiley   +1 more source

Patient‐reported outcomes, postoperative pain and pain relief after day‐case surgery (POPPY): short‐term peri‐operative analgesic use

open access: yesAnaesthesia, EarlyView.
Summary Introduction An increasing proportion of complex surgical procedures are being performed in the UK as day‐cases, with variable and limited follow up. Discharge prescriptions must provide adequate analgesia, while considering the safety of the patient and public, following best practice guidance and good opioid stewardship.
Anna Ratcliffe   +2083 more
wiley   +1 more source

Finite element simulation of barge impact into a rigid wall

open access: yesAlexandria Engineering Journal, 2014
The forces and locations of inland barge impacts currently control the design specifications for lock walls. This has resulted in a significant increase in the final construction costs of these walls.
H.W. Leheta   +2 more
doaj   +1 more source

Characterization of retinal pigment epithelium layer in healthy and diseased retinas with high‐resolution adaptive optics transscleral flood illumination imaging

open access: yesActa Ophthalmologica, EarlyView.
Abstract Purpose The retinal pigment epithelium (RPE) is critical in the pathophysiology of retinal diseases, such as age‐related macular degeneration. Adaptive optics transscleral flood illumination (AO‐TFI) offers rapid, detailed morphometric characterization of the RPE layer.
Leila Sara Eppenberger   +8 more
wiley   +1 more source

Sensitivity Study on Parameters of Large-size Jacket Launching

open access: yesShiyou jixie, 2017
There are various parameters affecting the jacket launching trajectory and safety. In order to make the selection procedure of the parameter values faster and more accurate, the parameterized finite element simulation model has been established including
Wang Tianying, Jiang Ximin
doaj  

Further Considerations Needed to Assess Reshoring: Its Impact on Host Communities

open access: yesBusiness Ethics, the Environment &Responsibility, EarlyView.
ABSTRACT After several decades of offshoring, reshoring is becoming an emergent strategy in many countries and industries. Both governments compel firms to reshore their production to their home countries as firms find, in some cases, that it is more profitable for them to do so.
Fernando Merino
wiley   +1 more source

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