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We model dynamic competition between firms which improve their products through learning from customer data, either by pooling different customers' data (across‐user learning) or by learning from repeated usage of the same customers (within‐user learning). We show how a firm's competitive advantage is affected by the shape of firms' learning functions, asymmetries between their learning functions, the extent of data accumulation, and customer beliefs. We also explore how public policies toward data sharing, user privacy, and killer data acquisitions affect competitive dynamics and efficiency. Finally, we show conditions under which a consumer coordination problem arises endogenously from data‐enabled learning. [ABSTRACT FROM AUTHOR]

Introduction: Australia has a doctor shortage in rural settings, and rural placements for medical students have an important role in increasing the likelihood of students staying in rural settings throughout their careers. However, to date there is limited research regarding medical student perceptions of rural placement quality. Objective: We aimed to determine factors that impact the overall medical student experience during rural placements. Design: Cross‐sectional survey. Setting: Rural/remote clinical schools across Australia. Participants: Medical students on rural/remote clinical placements for at least 6 months. Main outcome measures: To assess factors impacting student experience on rural placements, we conducted a cross‐sectional survey, known as the Australian Rural Clinical School Support Survey (ARCSSS) which was completed online by medical students across Australia. Demographic data were collected in addition to responses regarding academic teaching, extracurricular activities, and support services. Multiple choice and Likert scale questions were utilised. Results: A total of 107 responses to our survey were analysed. The majority of participants were female (66.4%), and in their middle years of clinical education (55.1%). Overall, respondents showed high levels of satisfaction with clinical school supervisors, and clinical education. A high proportion of respondents indicated minimal accessibility of health and other support services. While a large proportion of participants indicated satisfaction with the rural placements, it was demonstrated that students were generally dissatisfied with school wellness activities and extracurricular activities. Financial insecurity was noted. Conclusion: The findings from our survey indicate there are numerous areas in which rural placements have been effective for medical students, and others in which improvement is needed. Furthermore, more research is required to better develop well‐being initiatives that are effective in improving overall experience. [ABSTRACT FROM AUTHOR]

Platforms use price parity clauses to prevent sellers setting lower prices when selling through other channels. They claim these restraints are needed so platforms have incentives to invest in providing search services—without them, consumers would search on the platform but then switch to buy in a cheaper channel. In a model incorporating these effects, we find that wide price parity clauses lead to excessive platform investment while narrow (or no) price parity clauses lead to insufficient platform investment. Taking these investment effects into account, wide price parity clauses lower consumer surplus but have ambiguous effects on total welfare. [ABSTRACT FROM AUTHOR]

Objective: To examine associations between extended medical graduates' rural clinical school (RCS) experience and geographic origins with practising in rural communities five and eight years after graduation. Design, participants: Cohort study of 2011 domestic medical graduates from ten Australian medical schools with rural clinical or regional medical schools. Main outcome measures: Practice location types eight years after graduation (2019/2020) as recorded by the Australian Health Practitioner Regulation Agency, classified as rural or metropolitan according to the 2015 Modified Monash Model; changes in practice location type between postgraduate years 5 (2016/2017) and 8 (2019/2020). Results: Data were available for 1321 graduates from ten universities; 696 were women (52.7%), 259 had rural backgrounds (19.6%), and 413 had extended RCS experience (31.3%). Eight years after graduation, rural origin graduates with extended RCS experience were more likely than metropolitan origin graduates without this experience to practise in regional (relative risk [RR], 3.6; 95% CI, 1.8–7.1) or rural communities (RR, 4.8; 95% CI, 3.1–7.5). Concordance of location type five and eight years after graduation was 92.6% for metropolitan practice (84 of 1136 graduates had moved to regional/rural practice, 7.4%), 26% for regional practice (56 of 95 had moved to metropolitan practice, 59%), and 73% for rural practice (20 of 100 had moved to metropolitan practice, 20%). Metropolitan origin graduates with extended RCS experience were more likely than those without it to remain in rural practice (RR, 2.0; 95% CI, 1.3–2.9) or to move to rural practice (RR, 1.9; 95% CI, 1.2–3.1). Conclusion: The distribution of graduates by practice location type was similar five and eight years after graduation. Recruitment to and retention in rural practice were higher among graduates with extended RCS experience. Our findings reinforce the importance of longitudinal rural and regional training pathways, and the role of RCSs, regional training hubs, and the rural generalist training program in coordinating these initiatives. [ABSTRACT FROM AUTHOR]

A growing number of digital platforms operate in a dual mode: running marketplaces for third‐party products, while selling their own products on those marketplaces. We build a model to explore the implications of this controversial practice. We analyze the tradeoffs that arise from a regulatory ban on the dual mode, showing how such a ban can harm consumer surplus and welfare even when the platform would otherwise engage in product imitation and self‐preferencing. In the empirically most relevant scenarios, policies that prevent platform imitation and self‐preferencing generate better outcomes than an outright ban on the dual mode. [ABSTRACT FROM AUTHOR]

Objective: The project aims to build a framework for conducting clinical trials for long‐term interplanetary missions to contribute to innovation in clinical trials on Earth, especially around patient involvement and ownership. Methods: We conducted two workshops in which participants were immersed in the speculative scenario of an interplanetary mission in which health problems emerged that required medical trials to resolve. The workshops used virtual reality and live simulation to mimic a zero‐gravity environment and visual perception shifts and were followed by group discussion. Results: Some key aspects for the framework that emerged from the workshops included: (a) approaches to be inclusive in the management of the trial, (b) approaches to be inclusive in designing the research project (patient preference trials, n‐of‐1 trials, designing clinical trials to be part of a future prospective meta‐analysis, etc), (c) balancing the research needs and the community needs (eg, allocation of the participants based on both research and community need), (d) ethics and partnerships (ethics and consent issues and how they relate to partnerships and relationships). Conclusion: In identifying some key areas that need to be incorporated in future planning of clinical trials for interplanetary missions, we also identified areas that are relevant to engaging patients in clinical trials on Earth. We will suggest using the same methodology to facilitate more in‐depth discussions on specific aspects of clinical trials in aerospace medicine. The methodology can be more widely used in other areas to open new inclusive conversations around innovating research methodology. [ABSTRACT FROM AUTHOR]

We analyze the effects of the adoption of real‐time pricing (RTP) of electricity when generating firms have market power. We find that an increase in consumers on RTP contracts decreases peak prices and increases off‐peak prices, increases consumer surplus (both for switching and non‐switching consumers) and welfare, while decreasing industry profits, with these effects being magnified by the extent of market power. We illustrate these results by calibrating our model to the New Zealand electricity market, and find that taking into account the market power of generating firms increases the efficiency gains from RTP adoption by 41%. [ABSTRACT FROM AUTHOR]

We provide a model in which consumers search for firms directly or through platforms. Platforms lower search costs but charge firms for the transactions they facilitate. Platform fees raise the possibility of showrooming, in which consumers search on a platform but then switch and buy directly to take advantage of lower direct prices. In settings like this, search platforms like Booking.com have adopted price parity clauses, requiring firms to offer their best prices on the platform, arguing this is needed to prevent showrooming. However, despite allowing for showrooming in our model, we find that price parity clauses often harm consumers. [ABSTRACT FROM AUTHOR]

We consider whether workers who provide their services through online platforms, such as Handy and Uber, should be classified as independent contractors or employees. Using a formal economic model, we show how being too strict or too liberal in classifying workers as independent contractors (relative to the actual degree of control workers have) can be detrimental, not just to firms and welfare, but sometimes to the workers themselves. We also use the model to explore the extent to which an intermediate classification of workers between employees and independent contractors may lead to better outcomes. The intermediate classification is meant to apply to firms that retain control of some actions while their workers control others, as is the case for many online platforms. [ABSTRACT FROM AUTHOR]

Many platforms that facilitate transactions between buyers and sellers charge ad valorem fees in which fees depend on the transaction price set by sellers. Given these platforms do not incur significant costs that vary with transaction prices, their use of ad valorem fees has been questioned. In this paper, using a model that connects ad valorem fees to third‐degree price discrimination, we evaluate the welfare consequences of banning such fees. We find the use of ad valorem fees generally increases welfare, including for calibrated versions of the model based on data from Amazon's marketplace and Visa's signature debit cards. [ABSTRACT FROM AUTHOR]

This article explains why platforms such as Amazon and Visa rely predominantly on ad valorem fees, fees which increase proportionally with transaction prices. It also provides a new explanation for why ad valorem sales taxes are more desirable than specific taxes. The theory rests on the ability of ad valorem fees and taxes to achieve efficient price discrimination, given that the value of a transaction to buyers tends to vary proportionally with the cost of the good traded. [ABSTRACT FROM AUTHOR]

We consider the implications of platform price discrimination in the context of card platforms. Despite the platform's ability to price discriminate, we show that it will set fees for card usage that are too low, resulting in excessive usage of cards. We show this bias remains even if card fees (or rewards) can be conditioned on each type of retailer that the cardholder transacts with. We use our model to consider the European Commission's objection to the rules card platforms have used to sustain differential interchange fees across European countries. [ABSTRACT FROM AUTHOR]

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Objective To propose a model of mentoring suitable for rural and remote health professionals. Design Given the rural and remote health workforce shortage, mentoring is proposed as a workforce retention strategy. Mentoring literature was reviewed; aspects of mentoring highlighted in the literature were considered to ascertain their suitability for rural and remote health professionals. Method A total of 39 mentoring papers were reviewed to outline key factors in mentoring rural and remote health professionals. Using this literature, key ways that rural and remote practice enhance or are barriers to mentoring were identified. From this, a model for mentoring rural and remote health practitioners, students and academics was developed. Results Four models of mentoring were identified: the cloning, nurturing, friendship and apprenticeship models. The apprenticeship model was identified as suitable for students, the nurturing model as suited to new health professionals to rural and remote settings and the friendship model for senior practitioners/academics. Factors more likely to enable mentoring in rural and remote settings were identified as feelings of obligation by senior practitioners, strong relationships between staff, blurred work/social boundaries, lack of hierarchy, inter-professional practice and technology. The barriers identified included workloads, access to mentors, fee-for-service system for some practitioners, conflicts which could jeopardise working and business relationships, and feelings of being judged. Conclusions A model of mentoring for rural and remote health professionals was presented. Given the potential to strengthen and increase the rural and remote health workforce, trialling such a model is worthwhile and evaluation would identify its impact. [ABSTRACT FROM AUTHOR]

I formalize the popular argument that retailers pay too much and cardholders too little to make use of payment card platforms, resulting in excessive use of cards. To do this, I analyze a standard two-sided market model of a payment card platform. With minimal additional restrictions, the model implies that the privately set fee structure is unambiguously biased against retailers in favor of cardholders, a result that continues to hold even if the platform can perfectly price discriminate on both sides. The market failure arising is primarily a regulatory problem and does not raise any competition concerns. [ABSTRACT FROM AUTHOR]

The combined effect of a chemical (fluoranthene) and a nonchemical stress (reduced soil moisture content) to the widely distributed earthworm Lumbricus rubellus were investigated in a laboratory study. Neither fluoranthene (up to 500 μg/g) nor low soil moisture (15% below optimal) had a significant effect on the survival of the exposed worms, but a significant effect on reproduction (cocoon production rate) was found for both stressors (p < 0.001 in both cases). The response of cocoon production to each stressor could be well described by a logistic model; this suggested that the joint effects may be applicable to description using the independent action (IA) model that is widely used in pharmacology and chemical mixture risk assessment [1]. Fitting of the IA model provided a good description of the combined stressor data (accounting for 53.7% of total variation) and was the most parsimonious model describing joint effect (i.e., the description of the data was not improved by addition of further parameters accounting for synergism or antagonism). Thus, the independent action of the two responses was further supported by measurement of internal fluoranthene exposure. The chemical activity of fluoranthene in worm tissue was correlated only with soil fluoranthene concentration and not with soil moisture content. Taken together these results suggest that the IA model can help interpret the joint effects of chemical and nonchemical stressors. Such analyses should, however, be done with caution since the literature data set suggests that there may be cases where interactions between stressors result in joint effects that differ significantly from IA predictions. [ABSTRACT FROM AUTHOR]

Most organochlorine (OC) use has been banned in Spain, but these compounds are persistent and may still adversely affect predatory birds. Data generally are lacking, however. Residues of hexachlorobenzene, α-hexachlorocyclohexane, lindane, hexachloro-octahydro-epoxy-dimethanonaphthalene, DDT, dichlorodiphenyldichloroethane, dichlorodiphenyldichloroethylene (DDE), and polychlorinated biphenyls (PCBs) were measured in 22 failed eggs of booted eagles (Hieraaetus pennatus) and goshawks (Accipiter gentilis) from southeastern Spain; both species are declining in this region. Hexachloro-octahydro-epoxy-dimethanonaphthalene, DDE, and sum PCB congener concentrations were significantly higher in booted eagle than in goshawk eggs, and an inverse relationship was found between shell thickness and DDE concentrations in booted eagles. Organochlorides may have been associated with the failure of some booted eagle eggs, but concentrations in booted eagle and goshawk eggs decreased over the period during which populations have dwindled. Thus, although OCs may be a contributory factor, they are unlikely to be the primary cause of the recent population declines in southeastern Spain. [ABSTRACT FROM AUTHOR]

This paper presents a model of competing payment schemes. Unlike previous work on generic two-sided markets, the model allows for the fact that in a payment system, users on one side of the market (merchants) compete to attract users on the other side (consumers, who may use cards for purchases). It analyzes how competition between card associations and between merchants affects the choice of interchange fees, and thus the structure of fees charged to cardholders and merchants. Implications for other two-sided markets are discussed. [ABSTRACT FROM AUTHOR]

This paper presents a model of a card payment system as a two-sided market that allows for partial participation by heterogeneous consumers and merchants. Taking into account the strategic effects arising from competition between merchants, the model is used to characterize the optimal structure of fees between those charged to cardholders and those charged to merchants and, more specifically, the level of the interchange fee that banks charge each other. The results modify the existing characterizations of the interchange fee, and explain the source of potential deviations between the privately and socially optimal level of the fee. [ABSTRACT FROM AUTHOR]

Analyzes the antitrust case involving Clear Communications and Telecom over the problem of network interconnection in the telecommunications industry in New Zealand. Overview of the Clear-Telecom litigation; Model of interconnection; Implications of the Baumol-Willig rule on the bargaining position of Telecom; Distinction between competition and efficiency.

The article presents a study which determined the efficiency over the improvement of knowledge, attitudes, and resolution to rural health issues through short-term replacement of metropolitan medical students. Invited to participate were medical students at a 3-week Rural Health Modules orientation and questionnaire wherein students had been asked to comment on issues. Results indicated that undergoing a 3-week RHM can improve the student's knowledge on the issues confronting rural health.

An introduction is presented in which the author talks about the topics discussed within the issue including perspectives on economics research on multisided platforms, mergers and entry in media markets, and problems in network effect estimation.

A response from the author of the article "Rural clinical school outcomes: what is success and how long do we wait for it?" in the November 17, 2014 issue is presented.