Results 161 to 170 of about 21,980,265 (388)

The Effectiveness of Anti‐Adhesion Barriers on Prevention of Postoperative Adhesive Bowel Obstruction: Disease‐Free Survival Analysis

open access: yesAnnals of Gastroenterological Surgery, EarlyView.
We performed a survival analysis of abdominal gastroenterological cancer surgery cases with and without anti‐adhesive barriers, with the development of adhesive bowel obstruction as the outcome. The incidence of adhesive bowel obstruction was significantly lower in patients undergoing open or laparoscopic colorectal surgery in the anti‐adhesive ...
Shota Ebinuma   +5 more
wiley   +1 more source

Competition and Oligopoly: A Case of UK Grocery Retailing [PDF]

open access: yes
In this paper we develop a model of Bertrand price competition with uncertainty as to the number of bidders. The auction models predict retail price dispersion as an observable feature of price discrimination.
Chih-Cheng Yang, Kevin A. Lawler
core  

Comparison of Minimally Invasive Colectomy Between Intra‐ Versus Extra‐Corporeal Anastomosis Technique (COMMIT Study): Mid‐Term Analysis

open access: yesAnnals of Gastroenterological Surgery, EarlyView.
This multicenter retrospective cohort study compared mid‐term oncological outcomes between intracorporeal anastomosis (IA) and extracorporeal anastomosis (EA) in minimally invasive colectomy for colon cancer using propensity score–matched data from 2018 to 2022.
Takuya Takami   +9 more
wiley   +1 more source

Transition choice probabilities and welfare analysis in random utility models [PDF]

open access: yes
We study the descriptive and the normative consequences of attribute changes in standard discrete choice models. For additive random utility models, we derive expressions for the transition choice probabilities for a change in the systematic utility.
André de Palma, Karim Kilani
core  

CrossMatAgent: AI‐Assisted Design of Manufacturable Metamaterial Patterns via Multi‐Agent Generative Framework

open access: yesAdvanced Intelligent Discovery, EarlyView.
CrossMatAgent is a multi‐agent framework that combines large language models and diffusion‐based generative AI to automate metamaterial design. By coordinating task‐specific agents—such as describer, architect, and builder—it transforms user‐provided image prompts into high‐fidelity, printable lattice patterns.
Jie Tian   +12 more
wiley   +1 more source

We Know What You Choose! External Validity of Discrete Choice Models [PDF]

open access: yes
For over the last thirty years the multinomial logit model has been the standard in choice modeling. Development in econometrics and computational algorithms has led to the increasing tendency to opt for more flexible models able to depict more ...
Jaebong Chang, R. Karina Gallardo
core  

Interactive Tool for Customizing Hydrogel Properties in Practical Applications

open access: yesAdvanced Intelligent Systems, EarlyView.
This research provides an open‐access tool that enables the scientific community to optimally synthesize hydrogels without requiring expert knowledge, thereby reducing experimental costs. Soft materials represent an interdisciplinary frontier in modern science, combining theoretical and experimental knowledge from diverse fields in both fundamental ...
Ricardo Negrete‐Gallego   +5 more
wiley   +1 more source

Estimating nonparametric mixed logit models via EM algorithm [PDF]

open access: yes
The aim of this paper is to describe a Stata routine for the nonparametric estimation of mixed logit models using a Expectation-Maximisation algorithm. We also compare the performance of our estimator with respect to more typical parametric mixed logit ...
Daniele Pacifico
core  

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