The Impact of Non-Pharmaceutical Interventions on the Second Wave of COVID-19: Insights from an Artificial Intelligence-Based, Cross-Country Study

2021 ◽  
Author(s):  
Sile Tao ◽  
Nicola Luigi Bragazzi ◽  
Jianhong Wu ◽  
Bruce Mellado ◽  
Jude Dzevela Kong
Keyword(s):  
Artificial Intelligence ◽  
Country Study ◽  
Cross Country ◽  
The Impact ◽  
Second Wave ◽  
Pharmaceutical Interventions

scholarly journals Predicting the impact of asymptomatic transmission, non-pharmaceutical intervention and testing on the spread of COVID19

2020 ◽  
Author(s):  
Ira B. Schwartz ◽  
James Kaufman ◽  
Kun Hu ◽  
Simone Bianco
Keyword(s):  
Predictive Models ◽  
Health Interventions ◽  
Strong Impact ◽  
Public Health Interventions ◽  
Removal Time ◽  
The Impact ◽  
Second Wave ◽  
Pharmaceutical Interventions ◽  
Epidemiological Parameters ◽  
Disease Testing

AbstractWe introduce a novel mathematical model to analyze the effect of removing non-pharmaceutical interventions on the spread of COVID19 as a function of disease testing rate. We find that relaxing interventions has a strong impact on the size of the epidemic peak as a function of intervention removal time. We show that it is essential for predictive models to explicitly capture transmission from asymptomatic carriers and important to obtain precise information on asymptomatic transmission by testing. The asymptomatic reservoir, reported to account for as much as 85% of transmission, will contribute to resurgence of the epidemic if public health interventions are removed too soon. Use of more basic models that fail to capture asymptomatic transmission can result in large errors in predicted clinical caseload or in fitted epidemiological parameters and, therefore, may be unreliable in estimating the risk of a second wave based on the timing of terminated interventions.

scholarly journals The impact of mandatory adoption of XBRL on firm’s stock liquidity: a cross-country study

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Wafa Sassi ◽  
Hakim Ben Othman ◽  
Khaled Hussainey
Keyword(s):  
Design Methodology ◽  
Civil Law ◽  
Random Effects Model ◽  
Stock Liquidity ◽  
Content Type ◽  
Business Reporting ◽  
Country Study ◽  
Mandatory Adoption ◽  
Cross Country ◽  
The Impact

Purpose The purpose of this paper is to examine the impact of the mandatory adoption of eXtensible Business Reporting Language (XBRL) on firm’s stock liquidity. Design/methodology/approach Using a random-effects model, this study examines the impact of the mandatory adoption of XBRL (ADOPXBRL) on firm’s stock liquidity of 980 companies pertaining to 13 countries for a period from 2000 to 2016. Findings This paper finds that the mandatory ADOPXBRL affects negatively and significatively Amihud’s (2002) illiquidity ratio. Therefore, mandatory XBRL adoption enhances the firm’s stock liquidity. In addition, this paper finds that the impact of the mandatory ADOPXBRL on firm’s stock liquidity is more pronounced in civil law countries than in common law countries. Originality/value This paper contributes to the literature on the advantage of XBRL especially for the civil law countries by examining the impact of the mandatory ADOPXBRL on firm’s stock liquidity.

scholarly journals Effects of worldwide interventions and vaccination on COVID-19 between waves and countries

2021 ◽  
Author(s):  
Yong Ge ◽  
Wenbin Zhang ◽  
Haiyan Liu ◽  
Corrine W Ruktanonchai ◽  
Maogui Hu ◽  
...  
Keyword(s):  
Infectious Diseases ◽  
Large Scale ◽  
International Travel ◽  
Spatiotemporal Variations ◽  
School Closures ◽  
Vaccination Strategies ◽  
Travel Restrictions ◽  
The Impact ◽  
Second Wave ◽  
Pharmaceutical Interventions

Abstract Worldwide governments have rapidly deployed non-pharmaceutical interventions (NPIs) to mitigate the COVID-19 pandemic, together with the large-scale rollout of vaccines since late 2020. However, the effect of these individual NPI and vaccination measures across space and time has not been sufficiently explored. By the decay ratio in the suppression of COVID-19 infections, we investigated the performance of different NPIs across waves in 133 countries, and their integration with vaccine rollouts in 63 countries as of 25 March 2021. The most effective NPIs were gathering restrictions (contributing 27.83% in the infection rate reductions), facial coverings (16.79%) and school closures (10.08%) in the first wave, and changed to facial coverings (30.04%), gathering restrictions (17.51%) and international travel restrictions (9.22%) in the second wave. The impact of NPIs had obvious spatiotemporal variations across countries by waves before vaccine rollouts, with facial coverings being one of the most effective measures consistently. Vaccinations had gradually contributed to the suppression of COVID-19 transmission, from 0.71% and 0.86% within 15 days and 30 days since Day 12 after vaccination, to 1.23% as of 25 March 2021, while NPIs still dominated the pandemic mitigation. Our findings have important implications for continued tailoring of integrated NPI or NPI-vaccination strategies against future COVID-19 waves or similar infectious diseases.

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