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  1. Article ; Online: DIFFERENTIAL IMPACT OF COVID-19 IN AUSTRALIA

    WEE CHIAN KOH

    Journal of Business & Economic Analysis, Vol 04, Iss 01, Pp 5-

    EVIDENCE FROM GOOGLE SEARCH DATA

    2021  Volume 21

    Abstract: Quantifying the immediate economic impact of COVID-19 is important to design proportionate relief and support policies. However, surveys of businesses and households are only typically available after considerable delay. We use near-real-time Google ... ...

    Abstract Quantifying the immediate economic impact of COVID-19 is important to design proportionate relief and support policies. However, surveys of businesses and households are only typically available after considerable delay. We use near-real-time Google search data to examine the temporal and spatial impacts of COVID-19 on service sector activity in Australia. We find that the travel-related and consumer-facing sectors, such as aviation, tourism, hotels, restaurants, and retail trade, suffered steep contractions during the outbreak. By contrast, sectors that involve less physical and face-to-face interaction, such as info-communication technology (ICT) and delivery services, experienced significant gains. The magnitude of the impact is large. During the first COVID-19 wave between January and March, the demand for air travel, tourism, and hotel accommodation declined by 60–80%, while the demand for ICT and delivery services surged by more than 50%. In states and territories with low caseloads, the impact has also been severe due to government-enforced nationwide social distancing measures to contain disease spread. However, in states and territories that eased restrictions earlier and faster, there has been no significant reduction in demand for certain consumer-facing services. Our findings demonstrate the usefulness of high-frequency and near-real-time indicators in monitoring the rapidly unfolding effects of COVID-19.
    Keywords Google search ; COVID-19 ; non-pharmaceutical interventions ; social distancing ; Australia ; Business ; HF5001-6182 ; Economics as a science ; HB71-74
    Subject code 306
    Language English
    Publishing date 2021-08-01T00:00:00Z
    Publisher World Scientific Publishing Co. Pte Ltd.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article: Fiscal cyclicality in Brunei Darussalam

    Chian, Koh Wee

    Journal of Southeast Asian economies Vol. 33, No. 1 , p. 83-94

    2016  Volume 33, Issue 1, Page(s) 83–94

    Author's details Koh Wee Chian
    Keywords Fiscal policy ; fiscal rules ; oil fund ; Brunei Darussalam
    Language English
    Publishing place Singapore$h2013-
    Document type Article
    ZDB-ID 2713759-4 ; 2722497-1
    ISSN 2339-5206 ; 2339-5095
    ISSN (online) 2339-5206
    ISSN 2339-5095
    Database ECONomics Information System

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  3. Article: The effects of macroeconomic shocks on the Brunei economy

    Koh, Wee Chian

    Journal of the Asia Pacific economy Vol. 22, No. 3 , p. 414-428

    a sign restriction approach

    2017  Volume 22, Issue 3, Page(s) 414–428

    Author's details Wee Chian Koh
    Keywords Structural VAR ; sign restrictions ; oil price ; monetary policy ; fiscal policy ; Brunei Darussalam
    Language English
    Publisher Routledge
    Publishing place London
    Document type Article
    ZDB-ID 1355204-1 ; 2018960-6
    ISSN 1469-9648 ; 1354-7860
    ISSN (online) 1469-9648
    ISSN 1354-7860
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  4. Article: Fiscal multipliers

    Koh, Wee Chian

    Oxford economic papers Vol. 69, No. 3 , p. 569-590

    new evidence from a large panel of countries

    2017  Volume 69, Issue 3, Page(s) 569–590

    Author's details Wee Chian Koh
    Keywords Multiplikator ; Finanzpolitik ; Wirkungsanalyse ; Mundell-Fleming-Modell ; Panel ; VAR-Modell ; Welt
    Language English
    Publisher Oxford Univ. Press
    Publishing place Oxford
    Document type Article
    ZDB-ID 207599-4 ; 1467515-8
    ISSN 1464-3812 ; 0030-7653
    ISSN (online) 1464-3812
    ISSN 0030-7653
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  5. Article: How do oil supply and demand shocks affect Asian stock markets?

    Koh, Wee Chian

    Macroeconomics and finance in emerging market economies Vol. 10, No. 1/3 , p. 1-18

    2017  Volume 10, Issue 1, Page(s) 1–18

    Author's details Wee Chian Koh
    Keywords structural VAR ; sign restrictions ; oil price shocks ; stock market ; Asia
    Language English
    Dates of publication 2017-9999
    Publisher Routledge
    Publishing place London [u.a.]
    Document type Article
    ZDB-ID 2425758-8
    ISSN 1752-0843
    Database ECONomics Information System

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  6. Article: Forecasting GDP growth of Brunei Darussalam using factor models

    Chian, Koh Wee

    Malaysian journal of economic studies Vol. 52, No. 2 , p. 187-203

    2015  Volume 52, Issue 2, Page(s) 187–203

    Author's details Wee Chian Koh
    Keywords Brunei Darussalam ; factor models ; GDP forecasting ; principal components
    Language English
    Publishing place Kuala Lumpur
    Document type Article
    ZDB-ID 1148789-6 ; 2570355-9
    ISSN 1511-4554
    ISSN 1511-4554
    Database ECONomics Information System

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  7. Article ; Online: Estimating the impact of physical distancing measures in containing COVID-19

    Wee Chian Koh / Lin Naing / Justin Wong

    International Journal of Infectious Diseases, Vol 100, Iss , Pp 42-

    An empirical analysis

    2020  Volume 49

    Abstract: Background: Epidemic modelling studies predict that physical distancing is critical in containing COVID-19. However, few empirical studies have validated this finding. Our study evaluates the effectiveness of different physical distancing measures in ... ...

    Abstract Background: Epidemic modelling studies predict that physical distancing is critical in containing COVID-19. However, few empirical studies have validated this finding. Our study evaluates the effectiveness of different physical distancing measures in controlling viral transmission. Methods: We identified three distinct physical distancing measures with varying intensity and implemented at different times—international travel controls, restrictions on mass gatherings, and lockdown-type measures—based on the Oxford COVID-19 Government Response Tracker. We also estimated the time-varying reproduction number (Rt) for 142 countries and tracked Rt temporally for two weeks following the 100th reported case in each country. We regressed Rt on the physical distancing measures and other control variables (income, population density, age structure, and temperature) and performed several robustness checks to validate our findings. Findings: Complete travel bans and all forms of lockdown-type measures have been effective in reducing average Rt over the 14 days following the 100th case. Recommended stay-at-home advisories and partial lockdowns are as effective as complete lockdowns in outbreak control. However, these measures have to be implemented early to be effective. Based on the observed median timing across countries worldwide, lockdown-type measures are considered early if they were instituted about two weeks before the 100th case and travel bans a week before detection of the first case. Interpretation: A combination of physical distancing measures, if implemented early, can be effective in containing COVID-19—tight border controls to limit importation of cases, encouraging physical distancing, moderately stringent measures such as working from home, and a full lockdown in the case of a probable uncontrolled outbreak.
    Keywords SARS-CoV-2 ; COVID-19 ; Physical distancing ; Non-pharmaceutical interventions ; Transmission ; Infectious and parasitic diseases ; RC109-216 ; covid19
    Language English
    Publishing date 2020-11-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Estimating the impact of physical distancing measures in containing COVID-19: an empirical analysis.

    Koh, Wee Chian / Naing, Lin / Wong, Justin

    International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases

    2020  Volume 100, Page(s) 42–49

    Abstract: Background: Epidemic modelling studies predict that physical distancing is critical in containing COVID-19. However, few empirical studies have validated this finding. Our study evaluates the effectiveness of different physical distancing measures in ... ...

    Abstract Background: Epidemic modelling studies predict that physical distancing is critical in containing COVID-19. However, few empirical studies have validated this finding. Our study evaluates the effectiveness of different physical distancing measures in controlling viral transmission.
    Methods: We identified three distinct physical distancing measures with varying intensity and implemented at different times-international travel controls, restrictions on mass gatherings, and lockdown-type measures-based on the Oxford COVID-19 Government Response Tracker. We also estimated the time-varying reproduction number (R
    Findings: Complete travel bans and all forms of lockdown-type measures have been effective in reducing average R
    Interpretation: A combination of physical distancing measures, if implemented early, can be effective in containing COVID-19-tight border controls to limit importation of cases, encouraging physical distancing, moderately stringent measures such as working from home, and a full lockdown in the case of a probable uncontrolled outbreak.
    MeSH term(s) Betacoronavirus ; COVID-19 ; Coronavirus Infections/prevention & control ; Disease Outbreaks ; Humans ; Pandemics/prevention & control ; Pneumonia, Viral/prevention & control ; Psychological Distance ; SARS-CoV-2 ; Travel
    Keywords covid19
    Language English
    Publishing date 2020-08-13
    Publishing country Canada
    Document type Journal Article
    ZDB-ID 1331197-9
    ISSN 1878-3511 ; 1201-9712
    ISSN (online) 1878-3511
    ISSN 1201-9712
    DOI 10.1016/j.ijid.2020.08.026
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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  9. Article ; Online: Containing COVID-19: Implementation of Early and Moderately Stringent Social Distancing Measures Can Prevent The Need for Large-Scale Lockdowns.

    Koh, Wee Chian / Alikhan, Mohammad Fathi / Koh, David / Wong, Justin

    Annals of global health

    2020  Volume 86, Issue 1, Page(s) 88

    Abstract: Guidance from many health authorities recommend that social distancing measures should be implemented in an epidemic when community transmission has already occurred. The clinical and epidemiological characteristics of COVID-19 suggest this is too late. ... ...

    Abstract Guidance from many health authorities recommend that social distancing measures should be implemented in an epidemic when community transmission has already occurred. The clinical and epidemiological characteristics of COVID-19 suggest this is too late. Based on international comparisons of the timing and scale of the implementation of social distancing measures, we find that countries that imposed early stringent measures recorded far fewer cases than those that did not. Yet, such measures need not be extreme. We highlight the examples of Hong Kong and Brunei to demonstrate the early use of moderate social distancing measures as a practical containment strategy. We propose that such measures be a key part of responding to potential future waves of the epidemic.
    MeSH term(s) Brunei/epidemiology ; COVID-19/epidemiology ; COVID-19/prevention & control ; Coronavirus Infections/epidemiology ; Coronavirus Infections/prevention & control ; Epidemics/prevention & control ; Hong Kong/epidemiology ; Humans ; Pandemics/prevention & control ; Physical Distancing ; Pneumonia, Viral/epidemiology ; Pneumonia, Viral/prevention & control ; Public Health Practice ; Time Factors
    Keywords covid19
    Language English
    Publishing date 2020-07-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2821756-1
    ISSN 2214-9996 ; 2214-9996
    ISSN (online) 2214-9996
    ISSN 2214-9996
    DOI 10.5334/aogh.2969
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Containing COVID-19

    Wee Chian Koh / Mohammad Fathi Alikhan / David Koh / Justin Wong

    Annals of Global Health, Vol 86, Iss

    Implementation of Early and Moderately Stringent Social Distancing Measures Can Prevent The Need for Large-Scale Lockdowns

    2020  Volume 1

    Abstract: Guidance from many health authorities recommend that social distancing measures should be implemented in an epidemic when community transmission has already occurred. The clinical and epidemiological characteristics of COVID-19 suggest this is too late. ... ...

    Abstract Guidance from many health authorities recommend that social distancing measures should be implemented in an epidemic when community transmission has already occurred. The clinical and epidemiological characteristics of COVID-19 suggest this is too late. Based on international comparisons of the timing and scale of the implementation of social distancing measures, we find that countries that imposed early stringent measures recorded far fewer cases than those that did not. Yet, such measures need not be extreme. We highlight the examples of Hong Kong and Brunei to demonstrate the early use of moderate social distancing measures as a practical containment strategy. We propose that such measures be a key part of responding to potential future waves of the epidemic.
    Keywords Infectious and parasitic diseases ; RC109-216 ; Public aspects of medicine ; RA1-1270 ; covid19
    Language English
    Publishing date 2020-07-01T00:00:00Z
    Publisher Ubiquity Press
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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