C. Tyler DesRoches

Background: Screen time among adults represents a continuing and growing problem in relation to health behaviors and health outcomes. However, no instrument currently exists in the literature that quantifies the use of modern screen-based devices. The primary purpose of this study was to develop and assess the reliability of a new screen time questionnaire, an instrument designed to quantify use of multiple popular screen-based devices among the US population. Methods: An 18-item screen-time questionnaire was created to quantify use of commonly used screen devices (e.g. television, smartphone, tablet) across different time points during the week (e.g. weekday, weeknight, weekend). Test-retest reliability was assessed through intra-class correlation coefficients (ICCs) and standard error of measurement (SEM). The questionnaire was delivered online using Qualtrics and administered through Amazon Mechanical Turk (MTurk). Results: Eighty MTurk workers completed full study participation and were included in the final analyses. All items in the screen time questionnaire showed fair to excellent relative reliability (ICCs = 0.50–0.90; all < 0.000), except for the item inquiring about the use of smartphone during an average weekend day (ICC = 0.16, p = 0.069). The SEM values were large for all screen types across the different periods under study. Conclusions: Results from this study suggest this self-administered questionnaire may be used to successfully classify individuals into different categories of screen time use (e.g. high vs. low); however, it is likely that objective measures are needed to increase precision of screen time assessment.

The volume includes topics from political philosophy and normative ethics on the one hand to philosophy of science and the philosophical underpinnings of water management policy on the other. It contains reflections on ecological nationalism, the legacy of Grey Owl, the meaning of ‘outside’ to Canadians, the paradigm shift from mechanism to ecology in our understanding of nature, the meaning of the concept of the Anthropocene, the importance of humans self-identifying as ‘earthlings’, the challenges of biodiversity protection and the status of cross-bred species, how to ground the moral considerability of ecosystems, the collapse of the Newfoundland and Labrador cod fishery, and much more. It covers metaphysics, ontology, ethics, political philosophy, critical history, and environmental policy. The range of topics and frames is as diverse and challenging as the land itself.

Since Thomas Kuhn’s The Structure of Scientific Revolutions (1962), historians and philosophers of science have paid increasing attention to the implications of disciplinarity. In this chapter we consider restrictions posed to interdisciplinary exchange between ecology and economics that result from a particular kind of commitment to the ideal of disciplinary purity, that is, that each discipline is defined by an appropriate, unique set of objects, methods, theories, and aims. We argue that, when it comes to the objects of study in ecology and economics, ideas of disciplinary purity have been underwritten by the artificial-natural distinction. We then problematize this distinction, and thus disciplinary purity, both conceptually and empirically. Conceptually, the distinction is no longer tenable. Empirically, recent interdisciplinary research has shown the epistemological and policy-oriented benefits of dealing with models which explicitly link anthropogenic (i.e., “artificial”) and non-anthropogenic factors (i.e., “natural”). We conclude that, in the current age of the Anthropocene, it is to be expected that without interdisciplinary exchange, ecology and economics may relinquish global relevance because the distinct and separate systems to which each “pure” science was originally made to apply will only diminish over time.

The concept of natural capital denotes a rich variety of natural processes, such as ecosystems, that produce economically valuable goods and services. The Anthropocene signals a diminished state of nature, however, with some scholars claiming that no part of the Earth’s surface remains untouched. What are ecological economists to make of natural capital during the Anthropocene? Is natural capital still a coherent concept? What is the conceptual relationship between nature and natural capital? This article wrestles with John Stuart Mill’s two concepts of nature and argues that during the Anthropocene, natural capital should be understood as denoting economically valuable processes that are not absolutely—but relatively—detached from intentional human agency.

Among scholars of ancient economic thought, it is widely recognized that Aristotle established an upper limit to money-making. This “natural limit” has been variously construed, with some claiming that it might be settled independently of Aristotle’s ethical theory. This paper defends the opposite thesis: Aristotle’s natural limit is inextricably tied to his account of human flourishing. It also argues that Aristotle precludes the wealth-seeking path as coincident with a flourishing life. Why? For Aristotle, money-making as an end in itself is endemic to the life of pleasure, not the good life. Moreover, the unchecked pursuit of ever more money is likely to crowd out other intrinsically valuable goods, such as friendship, agency, and autonomy. Finally, from the standpoint of Aristotle’s virtue ethics, wealth acquisition beyond the natural limit is considered to be a vice, not a virtue.

MARGARET LYNN SCHABAS (Toronto, 1954) is professor of philosophy at the University of British Columbia in Vancouver and served as the head of the Philosophy Department from 2004-2009. She has held professoriate positions at the University of Wisconsin-Madison and at York University, and has also taught as a visiting professor at Michigan State University, University of Colorado-Boulder, Harvard, CalTech, the Sorbonne, and the École Normale de Cachan. As the recipient of several fellowships, she has enjoyed visiting terms at Stanford, Duke, MIT, Cambridge, the LSE, and the MPI-Berlin. In addition to her doctorate in the history and philosophy of science and technology (Toronto 1983), she holds a bachelor of science in music (oboe) and the philosophy of science (Indiana 1976), a master’s degree in the history and philosophy of science (Indiana 1977), and a master’s degree in economics (Michigan1985). She has published four books and over forty articles or book chapters in science studies. Some of the journals in which her articles can be found are Isis, Monist, History of Political Economy, Public Affairs Quarterly, Daedaelus, Journal of Economic Perspectives, and Studies in the History and Philosophy of Science. Her first book, A world ruled by number (1990) examines the emergence of mathematical economics in the second half of the nineteenth century. Her second book, The natural origins of economics (2005), traces the transformation of economics from a natural to a social science. She also has two co-edited collections, Oeconomies in the age of Newton (2003), with Neil De Marchi, and David Hume’s political economy (2008), with Carl Wennerlind. She is currently writing a monograph on Hume’s economics, as well as articles on the history and philosophy of bioeconomics. She is currently president of the History of Economics Society. EJPE interviewed Margaret Schabas at the University of British Columbia in March 2013. In this interview, she recounts her earliest foray into the history and philosophy of economics, the conceptual trade between economics and natural science, and her most recent undertaking: the history and philosophy of bioeconomics.

The Erasmus Journal for Philosophy and Economics is very pleased to present this interview with Tony Lawson in which he discusses his work on various issues including social ontology and critical realism in economics, along with the differences that he perceives between his position and those of Uskali Mäki and Nancy Cartwright. We had the opportunity to sit down and talk with Lawson about all these issues following his presentation this past spring at the research seminar series at the Erasmus Institute for Philosophy and Economics (EIPE), in Rotterdam.

There is widespread consensus that present patterns of consumption could lead to the permanent impossibility of maintaining those patterns and, perhaps, the existence of the human race. While many patterns of consumption qualify as ‘sustainable’ there is one in particular that deserves greater attention: virtual consumption. We argue that virtual consumption — the experience of authentic consumptive experiences replicated by alternative means — has the potential to reduce the deleterious consequences of real consumption by redirecting some consumptive behavior from shifting material states to shifting information states.

This chapter argues that the human right to water entails specific moral limits to commodifying water. While free-market economists have generally recognized no such limits, the famous Canadian environmental thinker Maude Barlow has claimed that the human right to water entails that no water markets should be permitted. With a Lockean conception of the human right to water, this chapter argues that both views are mistaken. If water markets prevent people from obtaining some minimal and proportional share of water, by charging a prohibitively high price, or otherwise, then they put the human right to water in jeopardy and, therefore, should be blocked.

In 2016, a multidisciplinary body of scholars within the International Commission on Stratigraphy—the Anthropocene Working Group—recommended that the world officially recognize the Anthropocene as a new geological epoch. The most contested claim about the Anthropocene, that humans are a major geological and environmental force on par with natural forces, has proven to be a hotbed for discussion well beyond the science of geology. One reason for this is that it compels many natural and social scientists to confront problems and systems that transgress traditional disciplinary boundaries, and as a result, calls for interdisciplinary research are now gaining traction. Proponents of such transgressions have dubbed the new scientific order that will result “Anthropocene Science”, and rhetoric notwithstanding, such discussions exemplify how recent changes within science justify rethinking a prevailing image of how science is done, and with it, the working relationship between scholars in the humanities, natural scientists, and social scientists.

Canadian Environmental Philosophy is the first collection of essays to take up theoretical and practical issues in environmental philosophy today, from a Canadian perspective. The essays cover various subjects, including ecological nationalism, the legacy of Grey Owl, the meaning of “outside” to Canadians, the paradigm shift from mechanism to ecology in our understanding of nature, the meaning and significance of the Anthropocene, the challenges of biodiversity protection in Canada, the conservation status of crossbred species in the age of climate change, and the moral status of ecosystems. This wide range of topics is as diverse and challenging as the Canadian landscape itself. Given the extent of humanity's current impact on the biosphere – especially evident with anthropogenic climate change and the ongoing mass extinction – it has never been more urgent for us to confront these environmental challenges as Canadian citizens and citizens of the world. Canadian Environmental Philosophy galvanizes this conversation from the perspective of this place.

This dissertation undertakes a philosophical analysis of “natural capital” and argues that this concept has prompted economists to view nature in a radically novel manner. Formerly, economists referred to nature and natural products as a collection of inert materials to be drawn upon in isolation and then rearranged by human agents to produce commodities. More recently, however, nature is depicted as a collection of active, modifiable, and economically valuable processes, often construed as ecosystems that produce marketable goods and services gratis. Nature consists of various unproduced mechanisms or “natural machines” that are first discovered and then channeled so as to serve human ends. In short, nature as an ideal is a kind of garden that is characterized by natural objects purposefully arranged by intentional human agents.

Some environmental ethicists and economists argue that attributing infinite value to the environment is a good way to represent an absolute obligation to protect it. Others argue against modelling the value of the environment in this way: the assignment of infinite value leads to immense technical and philosophical difficulties that undermine the environmentalist project. First, there is a problem of discrimination: saving a large region of habitat is better than saving a small region; yet if both outcomes have infinite value, then decision theory prescribes indifference. Second, there is a problem of swamping probabilities: an act with a small but positive probability of saving an endangered species appears to be on par with an act that has a high probability of achieving this outcome, since both have infinite expected value. Our paper shows that a relative concept of infinite value can be meaningfully defined, and provides a good model for securing the priority of the natural environment while avoiding the failures noted by sceptics about infinite value. Our claim is not that the relative infinity utility model gets every detail correct, but rather that it provides a rigorous philosophical framework for thinking about decisions affecting the environment.