Results 21 to 30 of about 11,225,904 (309)

Challenges of calculating cost-effectiveness thresholds [PDF]

open access: yesThe Lancet Global Health, 2023
Contains fulltext : 296650.pdf (Publisher’s version ) (Open Access)
Vallejo-Torres, Laura   +8 more
openaire   +4 more sources

Threshold Effects in Multivariate Error Correction Models [PDF]

open access: yes, 2006
We propose a testing procedure for assessing the presence of threshold effects in nonstationary vector autoregressive models with or without cointegration.
Gonzalo, Jesús, Pitarakis, Jean-Yves
core   +1 more source

Threshold and Deadline Effect in Crowdfunding

open access: yesProcedia Computer Science, 2019
Abstract The deadline effect and threshold effect are common in product development and group buying. We consider these two effects also exist in crowdfunding, affecting the crowdfunding performance in the future. We conduct an empirical study using a dataset from Kickstarter.com to examine these two effects and their interactive relationship on the ...
Yan Song, Xin Tian 0003, Chunlin Luo
openaire   +2 more sources

From nitrogen addition to productivity: above–belowground mechanisms and nonlinear thresholds in Grasslands

open access: yesFrontiers in Plant Science
Grasslands harbor high biodiversity and regulate continental carbon and nitrogen cycling, yet rising anthropogenic nitrogen (N) inputs are reshaping their structure, function, and stability. Synthesizing recent evidence, we show that in N-limited systems
Yujuan Zheng   +6 more
doaj   +1 more source

Regional innovation and spillover effects of foreign direct investment in China: a threshold approach [PDF]

open access: yes, 2012
Using a data set on twenty-nine Chinese provinces for the period 1985–2008, this paper establishes a threshold model to analyse the relationship between spillover effects of foreign direct investment (FDI) and regional innovation in China. There is clear
Lingyun Huang   +5 more
core   +1 more source

A mixed distribution to fix the threshold for Peak-Over-Threshold wave height estimation [PDF]

open access: yes, 2022
Modelling extreme values distributions, such as wave height time series where the higher waves are much less frequent than the lower ones, has been tackled from the point of view of the Peak-Over-Threshold (POT) methodologies, where modelling is based on
Hervás Martínez, César   +6 more
core   +1 more source

Threshold Effects in the Us Budget Deficit [PDF]

open access: yesEconomic Inquiry, 2003
We contribute to the debate on whether the US large federal budget deficits are sustainable in the long run. We model the US government deficit per capita as a threshold autoregressive process. We find evidence that the US budget deficit is sustainable in the long run and that economic policymakers will only intervene to reduce per capita deficit when ...
Philip Arestis   +2 more
openaire   +3 more sources

Interpretable GBDT Model for Analysing Ridership Mechanisms in Urban Rail Transit: A Case Study in Shenzhen

open access: yesApplied Sciences
With the acceleration of urbanisation and the diversification of residents’ travel needs, rail transit plays a critical role in mitigating traffic congestion. However, existing studies predominantly rely on linear models, neglecting the nonlinear effects
Wenjing Wang   +5 more
doaj   +1 more source

Is There a Debt-threshold Effect on Output Growth? [PDF]

open access: yesFederal Reserve Bank of Dallas, Globalization and Monetary Policy Institute Working Papers, 2015
This paper studies the long-run impact of public debt expansion on economic growth and investigates whether the debt-growth relation varies with the level of indebtedness. Our contribution is both theoretical and empirical. On the theoretical side, we develop tests for threshold effects in the context of dynamic heterogeneous panel data models with ...
Alexander Chudik   +3 more
openaire   +5 more sources

Threshold Effects of Biodiversity on Ecological Resilience: Evidence from Guangdong’s Prefecture-Level Cities

open access: yesLand
Understanding interactions between ecological resilience and biodiversity is critical for sustainable ecosystems and coordinated regional development. This study examines prefecture-level cities in Guangdong Province—characterized by diverse ecological ...
Xin Huang   +4 more
doaj   +1 more source

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