Introduction. Bert HAMMINGA and Neil DE MARCHI: Préface. Bert HAMMINGA and Neil DE MARCHI: Idealization and the Defence of Economics: Notes Toward a History. Part I: General Observations on Idealization in Economics. Kevin D. HOOVER: Six Queries about Idealization in an Empirical Context. Bernard WALLISER: Three Generalization Processes for Economic Models. Steven COOK and David HENDRY: The Theory of Reduction in Econometrics. Maarten C.W. JANSSEN: Economic Models and Their Applications. Adolfo GARCÍA DE LA SIENRA: Idealization and Empirical Adequacy (...) in Economic Theory. Izabella NOWAKOWA and Leszek NOWAK: On Correspondence between Economic Theories. Uskali MÄKI: Isolation, Idealization and Truth in Economics. Part II: Case Studies of Idealization in Economics. Nancy CARTWRIGHT: Mill and Menger: Ideal Elements and Stable Tendencies. Wolfgang BALZER: Exchange Versus Influence: A Case of Idealization. Kees COOLS, Bert HAMMINGA, Theo A.F. KUIPERS: Truth Approximation by Concretization in Capital Structure Theory. Daniel M. HAUSMAN: Paul Samuelson as Dr. Frankenstein: When an Idealization Runs Amuck. Hugo A. KEUZENKAMP: What if an Idealization is Problematic? The Case of the Homogeneity Condition in Consumer Demand. Werner DIEDERICH: Nowak on Explanation and Idealization in Marx's 'Capital'. Gérard JORLAND: Idealization and Transformation. Jack BIRNER: Idealizations and Theory Development in Economics. Some History and Logic of the Logic Discovery. Discussions. Leszek NOWAK: The Idealizational Methodology and Economics. Replies to Diederich, Hoover, Janssen, Jorland and Mäki. (shrink)

© 2017. The American Astronomical Society. All rights reserved.We present new observations of the low-mass companion to HD 984 taken with the Gemini Planet Imager as a part of the GPI Exoplanet Survey campaign. Images of HD 984 B were obtained in the J and H bands. Combined with archival epochs from 2012 and 2014, we fit the first orbit to the companion to find an 18 au orbit with a 68% confidence interval between 14 and 28 au, an eccentricity (...) of 0.18 with a 68% confidence interval between 0.05 and 0.47, and an inclination of 119°with a 68% confidence interval between 114°and 125°. To address the considerable spectral covariance in both spectra, we present a method of splitting the spectra into low and high frequencies to analyze the spectral structure at different spatial frequencies with the proper spectral noise correlation. Using the split spectra, we compare them to known spectral types using field brown dwarf and low-mass star spectra and find a best-fit match of a field gravity M6.5 ±1.5 spectral type with a corresponding temperature of K. Photometry of the companion yields a luminosity of log=2.88 ± 0.07 dex with DUSTY models. Mass estimates, again from DUSTY models, find an age-dependent mass of 34 ±1 to 95 ±4 M Jup. These results are consistent with previous measurements of the object. (shrink)

This volume examines why Sir Karl Popper's view of empirical falsifiability as the distinguishing characteristic of science has found appeal among economists.

In what follows, I would like to trace Dietrich von Hildebrand’s thinking on the nature of axiological properties. Hildebrand begins his analysis from the phenomenology of what we experience as important and distinguishes three categories of importance: the subjectively satisfying, the value and the objective good of the person. He then moves on to metaphysical analysis to clarify whether the categories describe properties of objects and concludes that the foundation of all importance is value, the intrinsic preciousness. He also examines (...) the families of values and the relations between being and value. This analysis has an important completion in the investigation of the types of oughtness, which allow us to understand the foundation of norms. Hildebrand’s value theory makes it possible to address some crucial metaphysical problems, in particular the question of whether good ultimately triumphs. The epistemological premise of Hildebrand’s perspective, however, is the thesis that man experiences not only facts, but also values. (shrink)

Hausman has argued that Mill in the Logic demands verification of qualified, inexact statements if they are to be considered lawlike. This puts Mill in line with a reasonable interpretation of what modern microeconomists are about, but requires the additional hypothesis that Mill abandoned his earlier stress on modal truth in his 1836 essay on the method of economics. The paper maintains that neither textual nor contextual evidence supports this hypothesis. Moreover, it is superfluous if one attends carefully to how (...) Mill conceived economic science, which occupied a peculiar, somewhat isolated place in his own views on the deductive method and on verification. (shrink)

We interpret ceteris paribus conditions as the conditions necessary to conducting an experiment. "Ceteris paribus" is thus not a hold-all for whatever we do not know, but a listing of the various decisions taken in moving from a theoretical hypothesis to a testable proposition. The decisions range from modeling in a certain way to selecting a particular functional form or estimation technique. They embody best knowledge/best practice. Debate about the meaning and importance of any test result must center on these (...) decisions; hence they should be laid bare. We give a detailed example from recent macroeconomics, Lucas' test of the natural rate hypothesis. (shrink)

Milton Friedman's famous methodological essay contains, along with much else, some strands that look as though they were taken from the “empirical-scientific” fabric described by Karl Popper. Think, for example, of Friedman's conviction that the way to test a hypothesis is to compare its implications with experience. Or of his more or less explicit espousal of the view that while no amount of facts can ever prove a hypothesis true, a single “fact” may refute it. Or of his assertion that (...) hypotheses are to be accepted only as provisionally true, and then only after repeated efforts to refute them have failed. The appearance of these Popperian ideas is not surprising. (shrink)

The complexity of current social and environmental grand challenges generates many conflicts and tensions at the individual, organization and/or systems levels. Paradox theory has emerged as a promising way to approach such a complexity of corporate sustainability going beyond the instrumental business-case perspective and achieving superior sustainability performance. However, the fuzziness in the empirical use of the concept of “paradox” and the absence of a systems perspective limits its potential. In this paper, we perform a systematic review and content analysis (...) of the empirical literature related to paradox and sustainability, offering a useful guide for researchers who intend to adopt the concept of “paradox” empirically. Our analysis provides a comprehensive account of the uses of the construct - which allows the categorization of the literature into three distinct research streams: 1) paradoxical tensions, 2) paradoxical frame/thinking, and 3) paradoxical actions/strategies - and a comprehensive overview of the findings that emerge in each of the three. Further, by adopting a system perspective, we propose a theoretical framework that considers possible interconnections across the identified paradoxical meanings and different levels of analysis (individual, organizational, systems) and discuss key research gaps emerging. Finally, we reflect on the role a clear notion of paradox can have in supporting business ethics scholars in developing a more “immanent” evaluation of corporate sustainability, overcoming the current instrumental view. (shrink)

Papers produced for a conference of economists, economic methodologists and historians of economics, convened to reflect on the question of whether MSRP - the methodology of scientific research programmes - has proved useful in the light of 20 years' experience.

This paper aims to investigate the nature of trust in others. First, we argue that the feeling of trust is an important phenomenon of human existence, but it is not the true root of trust in others. Trust is above all an intentional response of the person, one that must be motivated and adequate to its object. When we trust, we entrust a good that is important to another person so that he or she can take care of it. For (...) trust to be authentic, the other must be trustworthy. The feeling of trust, then, arises as a spontaneous response when we are aware that our trust is properly placed. When we have understood that trust is a response, it is possible to examine the ethical relevance of trust in others: trust fulfils morally relevant values, is the source of moral duties, introduces the person in the logic of self-giving and is nourished by a variety of moral virtues. (shrink)

The paper uses the formalism of indexed categories to recover the proof of a standard final coalgebra theorem, thus showing existence of final coalgebras for a special class of functors on finitely complete and cocomplete categories. As an instance of this result, we build the final coalgebra for the powerclass functor, in the context of a Heyting pretopos with a class of small maps. This is then proved to provide models for various non-well-founded set theories, depending on the chosen axiomatisation (...) for the class of small maps. (shrink)

Non-well-founded trees are used in mathematics and computer science, for modelling non-well-founded sets, as well as non-terminating processes or infinite data structures. Categorically, they arise as final coalgebras for polynomial endofunctors, which we call M-types. We derive existence results for M-types in locally cartesian closed pretoposes with a natural numbers object, using their internal logic. These are then used to prove stability of such categories with M-types under various topos-theoretic constructions; namely, slicing, formation of coalgebras , and sheaves for an (...) internal site. (shrink)

Living donation provides important access to organ transplantation, which is the optimal therapy for patients with end-stage liver or kidney failure. Paired exchanges have facilitated thousands of kidney transplants and enable transplantation when the donor and recipient are incompatible. However, frequently willing and otherwise healthy donors have contraindications to the donation of the organ that their recipient needs. Trans-organ paired exchanges would enable a donor associated with a kidney recipient to donate a lobe of liver and a donor associated with (...) a liver recipient to donate a kidney. This article explores some of the ethical concerns that trans-organ exchange might encounter including unbalanced donor risks, the validity of informed consent, and effects on deceased organ donation. (shrink)

The lambda calculus is a universal programming language. It can represent the computable functions, and such offers a formal counterpart to the point of view of functions as rules. Terms represent functions and this allows for the application of a term/function to any other term/function, including itself. The calculus can be seen as a formal theory with certain pre-established axioms and inference rules, which can be interpreted by models. Dana Scott proposed the first non-trivial model of the extensional lambda calculus, (...) known as $ D_{\infty }$, to represent the $\lambda $-terms as the typical functions of set theory, where it is not allowed to apply a function to itself. Here we propose a construction of an $\infty $-groupoid from any lambda model endowed with a topology. We apply this construction for the particular case $D_{\infty }$, and we see that the Scott topology does not provide enough information about the relationship between higher homotopies. This motivates a new line of research focused on the exploration of $\lambda $-models with the structure of a non-trivial $\infty $-groupoid to generalize the proofs of term conversion to higher-proofs in $\lambda $-calculus. (shrink)

Alci, Miguelzinho e Lazinho trouxeram espigas de milho, as primeiras colhidas no milharal de Ivo e Sueli, amigos e vizinhos, e Rosilene colocou na panela. Mais tarde, Alci, voltou com imensa abóbora que foi logo transformada em doce e ainda será quibebe e sopa, tudo em fogão de lenha. Neste recanto do sul de Minas, descoberto há cinco anos, conseguimos construir um pequeno refúgio. Marcia, arquiteta, decidiu que a casa teria grandes janelas e portas de vidro, abrindo para a floresta, (...) para vales e montanhas e, do lado direito, para a Pico do Papagaio, um dos símbolos de Minas Gerais. (shrink)

Convenções e costumes estabelecem que a denominação galinheiro prevaleça em espaços destinados abrigar bichos de pena de variadas extrações. Este o caso do galinheiro em questão, cujo domínio, em que pese a absoluta maioria galinácea, é ostensivamente exercido por casal de perus. Caminhos se abrem quando todo enfunado, rabo imponentemente aberto em leque, o senhor peru desanda grugrulejante e majestoso a desfilar.Fato de subidíssima relevância motiva-o no momento a incorporar com frequência essa postura de maneira menos casual: madame perua está (...) chocando. (shrink)

Nestes nossos tempos gerundistas e de valores-isopores o apelo ao eufemismo e à grandiloquência torna-se palavra de ordem e progresso. Oficinas mecânicas passam a ser chamadas de centros automotivos, açougues transmutam-se em butiques de carnes e sapatarias em recuperadoras de calçados.Daí a gente olha em volta e começa igualmente a não achar mais nem barbearias nem barbeiros.Quedê, perguntamos, a Tesoura de Ouro do Carlão? Pois seu salão ganhou a neomodernosa indicação de Cabeleireiro Masculino e virou ele esteticista capilar. Bate daí (...) saudade danada – possivelmente, diria. (shrink)

This paper aims to explore the association between over-indebtedness and two facets of well-being – life satisfaction and emotional well-being. Although prior research has associated over-indebtedness with lower life satisfaction, this study contributes to the extant literature by revealing its effects on emotional well-being, which is a crucial component of well-being that has received less attention. Besides subjective well-being, reported health, and sleep quality were also assessed. The findings suggest that over-indebted consumers have lower life satisfaction and emotional well-being, as (...) well as poorer health and sleep quality. Furthermore, over-indebtedness impacts life satisfaction and emotional well-being through different mechanisms. Consumers decreased perceived control accounts for the impact of over-indebtedness on both facets of well-being. Financial well-being, partly mediates the impact of indebtedness status on overall life satisfaction. The current study contributes to research focusing on the relationship between indebtedness, well-being, health, and sleep quality, and provides relevant theoretical and practical implications. (shrink)

RESUMO A partir do exame da tradição heraclitiana e platônica sobre a transitoriedade e a imortalidade - conceitos compreendidos como universais - este artigo defende a seguinte antinomia como tese: para haver temporalidade é preciso haver eternidade. Essa tese é demonstrada por meio do estudo e atualização das noções de alma, espírito, ideia e memória, as quais estão conectadas invariavelmente ao tempo passado como princípio ontológico do fenômeno histórico. Para além do ponto de vista filosófico, portanto, da perspectiva específica do (...) conhecimento histórico, este estudo expõe algumas implicações teóricas acerca das condições de possibilidade da história, que são discutidas, finalmente, em diálogo com Friedrich Nietzsche e Jacob Burckhardt. ABSTRACT From the analysis of the Heraclitian and Platonic tradition on transience and immortality - understood as universal concepts - this essay defends the following antinomy as its thesis: if there is temporality there must be eternity. This thesis is demonstrated through the study and updating of the notions of soul, spirit, idea and memory, which are invariably connected to the past as the ontological principle of the historical phenomenon. Beyond the philosophical point of view, therefore, from the specific perspective of historical knowledge, this study exposes some theoretical implications about the conditions of possibility of history, which are finally discussed in dialogue with Friedrich Nietzsche and Jacob Burckhardt. (shrink)

Conheci Raduan num sábado entre junho ou julho de 1996. Estimo os meses e garanto o dia e o ano em razão de Menina a caminho. Amizades comuns nos levaram então a participar de festa familiar no paulistano bairro do Pacaembu. Situado em rua tranquila, o restaurado sobrado compunha-se das variadas dependências requeridas em outros tempos por famílias de classes em fase de ascensão. No piso térreo, destacava-se o espaço destinado aos convidados: a ampla sala, integrada à copa e a (...) um ajardinado terraço. Sobretudo ali as crianças da casa e de vários convidados comiam, corriam e algazarreavam. (shrink)

Welch :263–279, 2017) has recently proposed two possible explanations for why the field of evolutionary biology is plagued by a steady stream of claims that it needs urgent reform. It is either seriously deficient and incapable of incorporating ideas that are new, relevant and plausible or it is not seriously deficient at all but is prone to attracting discontent and to the championing of ideas that are not very relevant, plausible and/or not really new. He argues for the second explanation. (...) This paper presents a twofold critique of his analysis: firstly, the main calls for reform do not concern the field of evolutionary biology in general but rather, or more specifically, the modern evolutionary synthesis. Secondly, and most importantly, these calls are not only inspired by the factors, enumerated by Welch, but are also, and even primarily, motivated by four problematic characteristics of the modern synthesis. This point is illustrated through a short analysis of the latest reform challenge to the modern synthesis, the so-called extended evolutionary synthesis. We conclude with the suggestion that the modern synthesis should be amended, rather than replaced. (shrink)