David Bell

Farm Foundation

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Chansuda Wongsrichanalai

Bangkok University

Mark D. Perkins

Royal Society of Arts

Qin Cheng

University of Malaya

James McCarthy

Peter Doherty Institute

Daniel Corsten

IE University

Rosanna W. Peeling

London School of Hygiene & Tropical Medicine

George Knox

Tilburg University

Jane Cunningham

World Health Organization

Andy Ramsay

World Health Organization

David Mabey

London School of Hygiene & Tropical Medicine

Cooperative Institutions

University of Pennsylvania

World Health Organization - Pakistan

World Health Organization

University of Queensland

London School of Hygiene & Tropical Medicine

QIMR Berghofer Medical Research Institute

University of London

World Health Organization Regional Office for the Western Pacific

University of California, Los Angeles

Foundation for Innovative New Diagnostics

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Evaluation of diagnostic tests for infectious diseases: general principles

Nature Reviews Microbiology (2008)

Shabir Banoo David Bell Patrick M. Bossuyt A. J. Herring David Mabey

Clinical Microbiology

10.1038/nrmicro1523y

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Citations (16)

Rapid diagnostic tests for malaria: are they sufficiently reliable?

Joanne Baker James McCarthy Michelle L. Gatton Nelson Lee David Bell

Abstract ◆ Malaria causes significant mortality and morbidity worldwide and is one of the major infectious diseases affecting the health of deployed Australian Defence Force personnel. ◆ Malaria rapid diagnostic tests (RDTs) offer great potential for early and accurate diagnosis of maal ra,i especially in remote areas. Many RDTs are now commercially available; however, their sensitivities have been reported to be variable. ◆ In this article, we examine the advantages and limitations of current malaria RDTs, analyse possible causes of the variations in sensitivity, and summarise our investigation of the effect of parasite antigen diversity on the sensitivity of RDTs that detect Plasmodium falciparum histidine-rich protein 2 (PfHRP2). ◆ At parasitaemias 250parasites/ μ L (enough to make a malaria-naive person ill), a proportion of patients may return a negative PfHRP2-based RDT result because of the infecting parasite carrying a “non-sensitive” gene encoding an HRP2 protein that is not detected by the kit at sufficiently high sensitivity. Patients with persisting symptoms should have repeated tests at a later time, and microscopy should be used if at all possible.

Plasmodium (life cycle)

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An annual quasidifference approach to water price elasticity

Water Resources Research (2008)

David Bell Ronald C. Griffin

The preferred price specification for retail water demand estimation has not been fully settled by prior literature. Empirical consistency of price indices is necessary to enable testing of competing specifications. Available methods of unbiasing the price index are summarized here. Using original rate information from several hundred Texas utilities, new indices of marginal and average price change are constructed. Marginal water price change is shown to explain consumption variation better than average water price change, based on standard information criteria. Annual change in quantity consumed per month is estimated with differences in climate variables and the new quasidifference marginal price index. As expected, the annual price elasticity of demand is found to vary with daily high and low temperatures and the frequency of precipitation.

Elasticity

Marginal utility

10.1029/2007wr006233

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Citations (18)

Inventory Showrooms and Customer Migration in Omni-Channel Retail: The Effect of Product Information

SSRN Electronic Journal (2013)

David Bell Santiago Gallino António Moreno

Omni-chanel environments where customers shop online and offline at the same retailer are ubiquitous, and are deployed by online-first and traditional retailers alike. We focus on the relatively understudied domain of online-first retailers, and the engagement of a key omni-channel tactic; specifically, introduction of showrooms (physical locations where customers can view and try products) in combination with online fulfillment that uses centralized inventory management. We ask whether, and if so, how, showrooms benefit the two most basic retail objectives: demand generation, and operational efficiency. Using quasi-experimental data on showroom openings by WarbyParker.com, the leading and iconic online-first eyewear retailer, we find that showrooms: (1) increase demand overall and in the online channel as well, (2) generate operational spillovers to the other channels by attracting customers who, on average, have a higher cost-to-serve, (3) improve overall operational efficiency by increasing conversion in a sampling channel and by decreasing returns, and (4) amplify these demand and operational benefits in dealing with customers who have the most acute need for the firm's products. Moreover, the effects we document strengthen with time as showrooms contribute not only to brand awareness but also to what we term channel awareness as well. We conclude by elaborating the underlying customer dynamics driving our findings and by offering implications for how online-first retailers might deploy omni-channel tactics.

10.2139/ssrn.2370535

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Citations (45)

An empirical test of the Theory of Sales: Do household storage constraints affect consumer and store behavior?

Quantitative Marketing and Economics (2006)

David Bell Christian A. L. Hilber

Affect

Price dispersion

Empirical Research

Survey data collection

10.1007/s11129-006-8127-9

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Citations (38)

Access to antimalarial therapy: accurate diagnosis is essential to achieving long term goals

BMJ (2009)

Heidi Hopkins Caroline Asiimwe David Bell

Increased attention to and funding for malaria promises to improve access to effective treatment, but Heidi Hopkins, Caroline Asiimwe, and David Bell argue that without diagnostic testing much of this effort will be wasted

10.1136/bmj.b2606

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Citations (38)

Cyberquake : Haraway's manifesto

Zoë Sofoulis David Bell Barbara M. Kennedy

Manifesto

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Citations (15)

Estimation of the malaria burden

Nature (2005)

David Bell Pernille Jorgensen Eva Christophel Kevin Palmer