ORCID Profile
0000-0002-1567-8901
Current Organisation
UNSW Sydney
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Industry economics and industrial organisation | International economics | Applied economics
Publisher: Elsevier BV
Date: 08-2015
Publisher: Institute for Operations Research and the Management Sciences (INFORMS)
Date: 06-2018
Abstract: We study the empirical relevance of the participation externality between liquidity suppliers (makers) and demanders (takers), i.e., whether liquidity demand attracts or reduces liquidity supply, and vice versa. We use exogenous shocks to exchange fees and technology as experiments to identify cross-sided complementarities between liquidity suppliers and demanders in the U.S. equity market. We find that the externality is large and positive, on average. However, the externality is negative in periods of high adverse selection. We quantify the economic significance of the externality by evaluating an exchange’s revenue after a fee change. The Internet appendix is available at 0.1287/mnsc.2016.2658 . This paper was accepted by Lauren Cohen, finance.
Publisher: Elsevier BV
Date: 2010
Publisher: Elsevier BV
Date: 2008
DOI: 10.2139/SSRN.967595
Publisher: Elsevier BV
Date: 12-2013
Publisher: Springer Science and Business Media LLC
Date: 31-01-2017
Publisher: Elsevier BV
Date: 2012
DOI: 10.2139/SSRN.2269245
Publisher: Wiley
Date: 11-07-0005
DOI: 10.1111/CBDD.12809
Abstract: A novel series of thiepine derivatives were synthesized and evaluated as potential antimicrobials. All the synthesized compounds were evaluated for their antimicrobial activities in vitro against the fungi Candida albicans (ATCC 10231), C. parapsilosis (clinical isolate), Gram-negative bacterium Pseudomonas aeruginosa (ATCC 44752), and Gram-positive bacterium Staphylococcus aureus (ATCC 25923). Synthesized compounds showed higher antifungal activity than antibacterial activity, indicating that they could be used as selective antimicrobials. Selected thiepines efficiently inhibited Candida hyphae formation, a trait necessary for their pathogenicity. Thiepine 8-phenyl[1]benzothiepino[3,2-c]pyridine (16) efficiently killed Candida albicans at 15.6 μg/mL and showed no embryotoxicity at 75 μg/mL. Derivative 8-[4-(4,5-dihydro-1H-imidazol-2-yl)phenyl][1]benzothiepino[3,2-c]pyridine (23) caused significant hemolysis and in vitro DNA interaction. The position of the phenyl ring was essential for the antifungal activity, while the electronic effects of the substituents did not significantly influence activity. Results obtained from in vivo embryotoxicity on zebrafish (Danio rerio) encourage further structure optimizations.
Publisher: Elsevier BV
Date: 12-2010
Publisher: Public Library of Science (PLoS)
Date: 02-12-2021
DOI: 10.1371/JOURNAL.PONE.0260726
Abstract: Mental health disorders represent an enormous cost to society, are related to economic outcomes, and have increased markedly since the COVID-19 outbreak. Economic activity contracted dramatically on a global scale in 2020, representing the worst crisis since the Great Depression. This study used the COVID Impact Survey to provide insights on the interactions of mental illness and economic uncertainty during COVID-19. We used a probability-based panel survey, COVID Impact Survey, conducted in the U.S. over three waves in the period April-June 2020. The survey covered in idual information on employment, economic and financial uncertainty, mental and physical health, as well as other demographic information. The prevalence of moderate mental distress was measured using a Psychological Distress Scale, a 5-item scale that is scored on a 4-point scale (total range: 0–15). The mental distress effect of employment, economic, and financial uncertainty, was assessed in a logit regression analysis conditioning for demographic and health information. It is found that employment, health coverage, social security, and food provision uncertainty are additional stressors for mental health. These economic factors work in addition to demographic effects, where groups who display increased risk for psychological distress include: women, Hispanics, and those in poor physical health. A decrease in employment and increases in economic uncertainty are associated with a doubling of common mental disorders. The population-representative survey evidence presented strongly suggests that economic policies which support employment (e.g., job keeping, job search support, stimulus spending) provide not only economic security but also constitute a major health intervention. Moving forward, the economic uncertainty effect ought to be reflected in community level intervention and prevention efforts, which should include strengthening economic support to reduce financial and economic strain.
Publisher: Cambridge University Press (CUP)
Date: 07-09-2020
DOI: 10.1017/S002210902000071X
Abstract: We study the quoting activity of market makers in relation to trading, liquidity, and expected returns. Empirically, we find larger quote-to-trade (QT) ratios in small, illiquid, or neglected firms, yet large QT ratios are associated with low expected returns. The last result is driven by quotes, not by trades. We propose a model of quoting activity consistent with these facts. In equilibrium, market makers monitor the market faster (and thus increase the QT ratio) in neglected, difficult-to-understand stocks. They also monitor faster when their clients are more precisely informed, which reduces mispricing and lowers expected returns.
Publisher: Elsevier BV
Date: 2010
DOI: 10.2139/SSRN.1566895
Publisher: Elsevier BV
Date: 2010
DOI: 10.2139/SSRN.1568737
Publisher: Elsevier BV
Date: 2013
DOI: 10.2139/SSRN.2263853
Publisher: Wiley
Date: 03-2009
DOI: 10.1111/J.1538-4616.2009.00212.X
Abstract: Recent research demonstrates that the well‐documented feeble link between exchange rates and economic fundamentals can be reconciled with conventional exchange rate theories under the assumption that the discount factor is near unity ( Engel and West 2005 ). We provide empirical evidence that this assumption is valid, lending further support to the above explanation of the empirical disconnect between nominal exchange rates and fundamentals.
Publisher: Cambridge University Press (CUP)
Date: 02-2016
DOI: 10.1017/S0022109016000028
Abstract: We use the introduction and subsequent removal of the flash-order functionality from NASDAQ as a natural experiment to investigate the impact of voluntary disclosure of trading intent on market quality. We find that flash orders significantly improve liquidity in NASDAQ. Furthermore, overall market quality improves (deteriorates) when flash functionality is introduced (removed). This result can be attributed to increased competition among liquidity suppliers across competing trading venues. Alternatively, flash orders attract responses from reactive traders immediately after the announcement, attracting more “hidden liquidity” and lowering risk-bearing costs for the overall market.
Publisher: Informa UK Limited
Date: 07-02-2007
Publisher: Emerald Group Publishing Limited
Date: 2011
Publisher: Springer Science and Business Media LLC
Date: 04-08-2021
DOI: 10.1038/S41398-021-01537-X
Abstract: Social distancing, self-isolation, quarantining, and lockdowns arising from the COVID-19 pandemic have been common restrictions as governments have attempted to limit the rapid virus transmission. In this study, we identified drivers of adverse mental and behavioral health during the COVID-19 pandemic and whether factors such as social isolation and various restrictions serve as additional stressors for different age groups. Univariate and multivariate regression analyses were conducted on a unique dataset based on a national probability-based survey dedicated to understanding the impact of COVID-19 in the U.S., which includes 19 questions on the in idual impact of restrictions, bans, and closures. The analysis used a moderate distress scale built on five questions related to mental health for 3,646 respondents. The mental health of young adults (18−34 years old) was the most affected by restrictions, while that of older adults ( years old) was less affected. In addition, demographic and health characteristics associated with differences in mental health varied by age group. The findings in this analysis highlight the differential mental health needs of different age groups and point to the marked necessity for differentiated and targeted responses to the mental health effects of COVID-19 by age group.
Publisher: Elsevier BV
Date: 11-2015
Publisher: Emerald Group Publishing Limited
Date: 2011
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Start Date: 2023
End Date: 12-2025
Amount: $324,861.00
Funder: Australian Research Council
View Funded Activity