Marginal structural models can be used to estimate the causal effect of a potentially time-varying treatment in the presence of time-dependent confounding via weighted regression. The standard approach of using inverse probability of treatment weighting can be sensitive to model misspecification and lead to high-variance estimates due to extreme weights. Various methods have been proposed to partially address this, including covariate balancing propensity score to mitigate treatment model misspecification, and truncation and stabilized-IPTW to temper extreme weights. In this article, we (...) present kernel optimal weighting, a convex-optimization-based approach that finds weights for fitting the MSMs that flexibly balance time-dependent confounders while simultaneously penalizing extreme weights, directly addressing the above limitations. We further extend KOW to control for informative censoring. We evaluate the performance of KOW in a simulation study, comparing it with IPTW, sIPTW, and CBPS. We demonstrate the use of KOW in studying the effect of treatment initiation on time-to-death among people living with human immunodeficiency virus and the effect of negative advertising on elections in the United States. (shrink)

There are three elements in this paper. One is what we shall call ‘the Hungarian project’. This is the collected work of Andréka, Madarász, Németi, Székely and others. The second is Molinini’s philosophical work on the nature of mathematical explanations in science. The third is my pluralist approach to mathematics. The theses of this paper are that the Hungarian project gives genuine mathematical explanations for physical phenomena. A pluralist account of mathematical explanation can help us with appreciating the significance of (...) the Hungarian project. The significance consists in the fruitfulness and spread of the project. The spread is wide because the explanations are written in the very familiar language of first-order logic with identity. For this reason, the explanation is understandable to many mathematicians. Because of the methodology adopted in the Hungarian project, the explanations are fruitful in another sense. In the Hungarian project certain questions are asked that would not be asked with a more usual methodology. The Hungarians are distinguished from other scientists in asking logical and mathematical questions, and these both deepen our understanding of the physical theories and induce further spread to mathematics and philosophy. (shrink)

This article explores how we use social media to construe identities and align with others into communities of shared values. The focus is on how ‘users of language perform their identities within uses of language’: How do personae using the microblogging service Twitter perform relational identities as they enact discourse fellowships? Addressing this question means understanding how personae enter into ambient affiliation. Such affiliation is ambient in the sense that social media users may not be interacting directly, but instead participating (...) in mass performances of hashtagging or contributing to iterations of Internet memes. This article will consider three key bonds using both a 100 million-word corpus of posts and a smaller specialized corpus collected by capturing the entire Twitter stream of a particular user. (shrink)

We answer three questions: 1. Can we give a wholly mathematical explanation of a physical phenomenon? 2. Can we give a wholly mathematical explanation for a whole physical theory? 3. What is gained or lost in giving a wholly, or partially, mathematical explanation of a phenomenon or a scientific theory? To answer these questions we look at a project developed by Hajnal Andréka, Judit Madarász, István Németi and Gergely Székely. They, together with collaborators, present special relativity theory in a three-sorted (...) first-order formal language. (shrink)

Summary By introducing the concept of “invariants”, Koffka endowed perceptual psychology with a flexible theoretical tool, which is suitable for representing vision situations in which a definite part of the stimulus pattern is relevant but not sufficient to determine a corresponding part of the perceived scene. He characterised his “invariance principle” as a principle conclusively breaking free from the “old constancy hypothesis”, which rigidly surmised point-to-point relations between stimulus and perceptual properties. In this paper, we explain the basic terms and (...) assumptions implicit in Koffka’s concept, by representing them in a set-theoretic framework. Then, we highlight various aspects and implications of the concept in terms of answers to six separate questions: forms of invariants, heuristic paths to them, what is invariant in an invariant, roots of conditional indeterminacy, variability vs. indeterminacy, and overcoming of the indeterminacy. Lastly, we illustrate the lasting value and theoretical power of the concept, by showing that Koffka’s insights relating to it do occur in modern perceptual psychology and by highlighting its role in a model of perceptual transparency. (shrink)

Tertiary qualities have been studied primarily by Gestalt psychologists. My aim in this article is to revisit the theoretical assumptions regarding tertiary qualities. I start from the Galilean distinction of the qualities of experience, the Lockean subdivision of qualities, the subjectivist definition in aesthetics and the theoretical contribution of Gestalt theory, to show the theoretical value of ‘tertiary qualities’ in the current context of experimental psychological research. I conclude that tertiary qualities are a crucial keyword for an experimental psychology based (...) on the primacy of perception. Such a perspective is in favour of a neo-Gestalt Experimental Phenomenology. (shrink)

We report in this paper the result of three experiments on risk, ambiguity and time attitude. The first two differed by the population considered (students vs. general population) while the third one used a different protocol and concerned students and portfolio managers. We find quite a lot of heterogeneity at the individual level. Of principal interest was the elicitation of risk, time and ambiguity attitudes and the relationship among these (model free) measures. We find that on the student population, there (...) is essentially no correlation. A non negligible fraction of the population behaves in an extremely cautious manner in the risk and ambiguity domain. When we drop this population from the sample, the correlation between our measures is also non significant. We also raise three questions linked to measurement of ambiguity attitudes that come out from our data sets. (shrink)

We argue that in extensive decision problems (extensive games with a single player) with imperfect recall care must be taken in interpreting information sets and strategies. Alternative interpretations allow for different kinds of analysis. We address the following issues: 1. randomization at information sets; 2. consistent beliefs; 3. time consistency of optimal plans; 4. the multiselves approach to decision making. We illustrate our discussion through an example that we call the ‘‘paradox of the absentminded driver.’’ Journal of Economic Literature Classification (...) Numbers: C7, D0. 1997 Academic Press. (shrink)

The pluralist sheds the more traditional ideas of truth and ontology. This is dangerous, because it threatens instability of the theory. To lend stability to his philosophy, the pluralist trades truth and ontology for rigour and other ‘fixtures’. Fixtures are the steady goal posts. They are the parts of a theory that stay fixed across a pair of theories, and allow us to make translations and comparisons. They can ultimately be moved, but we tend to keep them fixed temporarily. Apart (...) from considering rigour of proof as a fixture, I discuss fixed models, invariant notions and fixed information about objects across theories. There are other fixtures, but it is enough to start with these. (shrink)

_Screening the City_ Edited by Mark Shiel and Tony Fitzmaurice London: Verso, 2003 ISBN 1-85984-476-6 312 pp.

In front of dominant speeches on the world-city the global or generic city, we set the hypothesis of news territorialisations and of redefining of the locations of cities in the search for the assertion of productive sped cities. The example of the new development of the industrial-harbour fallow lands marks exactly that it exists today, according to cities, either a production completely standardizing of the city or specific valuations.

This paper explores the analogy between food label information and genetic information, in order to defend the right not to know judgmental nutritional information, such as the one conveyed by traffic light labels and other, more aggressive, recent proposals. Traffic light labeling judges the nutritional quality of food by means of colored flags on the front pack . It involves a simplification of the link between food quality and health outcomes. Unlike GDAs ,1 it does not present the consumer with (...) neutral nutritional information, but conveys an interpretation of the link between nutritional qualities and .. (shrink)

In this paper we argue that transparency of machine learning algorithms, just as explanation, can be defined at different levels of abstraction. We criticize recent attempts to identify the explanation of black box algorithms with making their decisions (post-hoc) interpretable, focusing our discussion on counterfactual explanations. These approaches to explanation simplify the real nature of the black boxes and risk misleading the public about the normative features of a model. We propose a new form of algorithmic transparency, that consists in (...) explaining algorithms as an intentional product, that serves a particular goal, or multiple goals (Daniel Dennet’s design stance) in a given domain of applicability, and that provides a measure of the extent to which such a goal is achieved, and evidence about the way that measure has been reached. We call such idea of algorithmic transparency “design publicity.” We argue that design publicity can be more easily linked with the justification of the use and of the design of the algorithm, and of each individual decision following from it. In comparison to post-hoc explanations of individual algorithmic decisions, design publicity meets a different demand (the demand for impersonal justification) of the explainee. Finally, we argue that when models that pursue justifiable goals (which may include fairness as avoidance of bias towards specific groups) to a justifiable degree are used consistently, the resulting decisions are all justified even if some of them are (unavoidably) based on incorrect predictions. For this argument, we rely on John Rawls’s idea of procedural justice applied to algorithms conceived as institutions. (shrink)

The widespread use of algorithms for prediction-based decisions urges us to consider the question of what it means for a given act or practice to be discriminatory. Building upon work by Kusner and colleagues in the field of machine learning, we propose a counterfactual condition as a necessary requirement on discrimination. To demonstrate the philosophical relevance of the proposed condition, we consider two prominent accounts of discrimination in the recent literature, by Lippert-Rasmussen and Hellman respectively, that do not logically imply (...) our condition and show that they face important objections. Specifically, Lippert-Rasmussen’s definition proves to be over-inclusive, as it classifies some acts or practices as discriminatory when they are not, whereas Hellman’s account turns out to lack explanatory power precisely insofar as it does not countenance a counterfactual condition on discrimination. By defending the necessity of our counterfactual condition, we set the conceptual limits for justified claims about the occurrence of discriminatory acts or practices in society, with immediate applications to the ethics of algorithmic decision-making. (shrink)

Law and racism are intertwined, with legal tools bearing the potential to serve as instruments of oppression or equity. This Special Issue explores this dual nature of health law, with attention to policing in the context of mental health, schools, and substance use disorders; industry and the environment in the context of food advertising, tobacco regulation, worker safety, and environmental racism; health care and research in the context of infant mortality, bias in medical applications of AI, and diverse inclusion in (...) research; and anti-racist teaching and practice in the context of building an interprofessional curriculum and medical-legal partnerships. (shrink)

Trust and monitoring are traditionally antithetical concepts. Describing trust as a property of a relationship of reliance, we introduce a theory of trust and monitoring, which uses mathematical models based on two classes of functions, including _q_-exponentials, and relates the levels of trust to the costs of monitoring. As opposed to several accounts of trust that attempt to identify the special ingredient of reliance and trust relationships, our theory characterizes trust as a quantitative property of certain relations of reliance that (...) can be quantified and expressed as a scalar quantity. Our theory is applicable to both human–human and human–artificial agent interactions, as it is agnostic with respect to the concrete realization of trustworthiness properties, and is compatible with many views differing on which properties contribute to trust and trustworthiness. Finally, as our mathematical models make the quantitative features of trust measurable, they provide empirical studies on trust with a rigorous methodology for its measurement. (shrink)

In this paper, I introduce a new term, adoptism, to characterize the unique form(s) of marginalization to which adopted persons are subjected. Adoptism shows up primarily as enforced gratitude, and this injunction to be grateful carries with it epistemic harms that have heretofore been overlooked because the dominant social narrative surrounding adoption is that it is an overwhelmingly positive practice. This dominant view stems largely from adoptive parents and the adoption industry, which is an institution, I argue, that is far (...) from child-centered and beneficent. Because those most impacted by being adopted, adopted persons, are conspicuously absent in discussions of adoption, there is a great potential for epistemic injustice. These injustices are magnified when adoptees attempt to provide testimony that challenges the prevailing social script surrounding adoption. Using my lived experience as a domestic adoptee, as well as the testimony of many other adopted persons, I uncover and examine the ways adoptees are harmed in our capacities as knowers. Finally, after dispelling the myths that adoptist ideology upholds, I suggest ways to redress the otherwise hidden injustices of adoption. (shrink)

This paper supports the personal data platform cooperative as a means of bringing about John Rawls’s favoured institutional realisation of a just society, the property-owning democracy. It describes personal data platform cooperatives and applies Rawls’s political philosophy to analyse the institutional forms of a just society in relation to the economic power deriving from aggregating personal data. It argues that a society involving a significant number of personal data platform cooperatives will be more suitable to realising Rawls’s principle of fair (...) equality of opportunity. (shrink)

In 2003, the South Carolina Supreme Court upheld the conviction of Regina McKnight, an African American woman who was convicted at the age of twenty‐two for committing “homicide by child abuse.” She became the first woman in the United States to be arrested, prosecuted, and convicted for experiencing a stillbirth. Rather than an outlier case in the annals of American jurisprudence that stretched law beyond reason while restraining compassion and justice, McKnight's conviction inspired similar prosecutions of other poor black women (...) and then of other women. More than one‐third of states consider pregnant women's illicit drug use a form of child abuse, resulting in unprecedented forms of criminal and civil punishment. Laws previously understood to protect pregnant women from domestic violence during pregnancy, such as fetal protection laws, now serve as the vehicles for prosecuting pregnant women. What these prosecutions and laws expose are the multitudinous ways in which the criminalization of poor pregnant women—and normalization of that criminalization, such that even doctors and nurses are expected to participate in it—serve to humiliate women, interfere with their reproductive health, and ultimately rob women of reproductive autonomy. (shrink)

After three proceedings in which neuroscience was a relevant factor for the final verdict in Italian courts, for the first time a recent case puts in question the legal relevance of neuroscientific evidence. This decision deserves international attention in its underlining that the uncertainty still affecting neuroscientific knowledge can have a significant impact on the law. It urges the consideration of such uncertainty and the development of a shared management of it.