In Proposition 4, lines 3, 4 and 8, 9 were scrambled by mistake during the pagination process of the online published article.

This paper introduces a receiver who perceives ambiguity in a binary model of Bayesian persuasion. The sender has a well-defined prior, while the receiver considers an interval of priors and maximizes a convex combination of worst and best expected payoffs. We characterize the sender’s optimal signal and find that the receiver’s payoff differences across states given each action, play a fundamental role in the characterization and the comparative statics. If the sender’s preferred action is the least sensitive one, then the (...) sender’s equilibrium payoff, as well as the sender’s preferred degree of receiver ambiguity, is increasing in the receiver’s pessimism. We document a tendency for ambiguity-sensitive receivers to be more difficult to persuade. (shrink)

Algorithms have become a widespread trope for making sense of social life. Science, finance, journalism, warfare, and policing—there is hardly anything these days that has not been specified as “algorithmic.” Yet, although the trope has brought together a variety of audiences, it is not quite clear what kind of work it does. Often portrayed as powerful yet inscrutable entities, algorithms maintain an air of mystery that makes them both interesting and difficult to understand. This article takes on this problem and (...) examines the role of algorithms not as techno-scientific objects to be known, but as a figure that is used for making sense of observations. Following in the footsteps of Harold Garfinkel’s tutorial cases, I shall illustrate the implications of this view through an experiment with algorithmic navigation. Challenging participants to go on a walk, guided not by maps or GPS but by an algorithm developed on the spot, I highlight a number of dynamics typical of reasoning with running code, including the ongoing respecification of rules and observations, the stickiness of the procedure, and the selective invocation of the algorithm as an intelligible object. The materials thus provide an opportunity to rethink key issues at the intersection of the social sciences and the computational, including popular concerns with transparency, accountability, and ethics. (shrink)

In contemporary discussions of the Ramsey Test for conditionals, it is commonly held that (i) supposing the antecedent of a conditional is adopting a potential state of full belief, and (ii) Modus Ponens is a valid rule of inference. I argue on the basis of Thomason Conditionals (such as ' If Sally is deceiving, I do not believe it') and Moore's Paradox that both claims are wrong. I then develop a double-indexed Update Semantics for conditionals which takes these two results (...) into account while doing justice to the key intuitions underlying the Ramsey Test. The semantics is extended to cover some further phenomena, including the recent observation that epistemic modal operators give rise to something very like, but also very unlike, Moore's Paradox. (shrink)

Uitgebreide crisiseditie.00Voor het leven is er geen generale repetitie. Je hebt slechts één kans. Gelukkig zijn grote denkers je voorgegaan en kun je bij hen terecht voor wijze raad. Zo helpt Diogenes je om je authentieke zelf te zijn, Epicurus om niet te veel geld uit te geven tijdens de uitverkoop en Kant om op tijd te remmen voor een zebrapad. Maar ook minder gearriveerde denkers helpen je een handje: André Hazes daagt je uit om vrijer te worden en De (...) Jeugd van Tegenwoordig steunt je in je verdriet.0In 'Filosofie voor een weergaloos leven' laat Lammert Kamphuis zien dat filosofie minder onbegrijpelijk en hoogdravend is dan we vaak denken. In achttien prikkelende stukken toont hij hoe zowel eeuwenoude als hedendaagse denkers je kunnen bijstaan in het alledaagse leven. Deze bundel biedt troost, geeft rust, verrijkt vriendschappen, creëert begrip voor andersdenkenden en leidt tot meer plezier in je werk. (shrink)

A dynamic semantics for epistemically modalized sentences is an attractive alternative to the orthodox view that our best theory of meaning ascribes to such sentences truth-conditions relative to what is known. This essay demonstrates that a dynamic theory about might and must offers elegant explanations of a range of puzzling observations about epistemic modals. The first part of the story offers a unifying treatment of disputes about epistemic modality and disputes about matters of fact while at the same time avoiding (...) the complexities of alternative theories. The second part of the story extends the basic framework to cover some complicated data about retraction and the interaction between epistemic modality and tense. A comparison between the suggestion made in this essay and current versions of the orthodoxy is provided. (shrink)

What should be the ‘informational base’ of welfare economics if one takes the insights from behavioral economics seriously? Sugden proposes individuals’ sets of opportunities. This paper discusses...

This dissertation has three parts. Part I, comprising chapters 1 and 2, addresses some basic commitments which must be presupposed in theorizing about concepts. Concepts, to a first approximation, are mental representations that are constituents of thoughts. Chapter 1 attempts to clarify the notion of representing. Chapter 2 reconstructs arguments in the work of Frege against the mental nature of thoughts and (by the same token) of concepts, arguing that they are confused and leave the notion of concepts as mental (...) representations unscathed. Part II, comprising chapters 3 to 5, pursues the aim of closing in on concepts in light of the widely shared understanding that concepts form a more specific class than just any kind of subpropositional mental representations. This part, if successful, should also help clarify the interrelations among a certain cluster of ideas which are customarily connected to the property of being a concept. Chapter 3 advocates storage in long-term memory as a basic, explanatorily principled criterion of delimiting concepts from nonconceptual mental representations. In leading up to this criterion, the chapter subjects to methodological critique the typical manner in which philosophers justify their assumption of a conceptual/nonconceptual-distinction. Chapter 4 investigates the idea that concepts are, in some sense, mental representations under which we categorize things in the world. Two versions of this idea of categorizing mental representations are distinguished, one metaphysical, the other psychological in kind. Both of these ideas, it is claimed, are inadequate to capture concepthood as such. Chapter 5 continues on the positive side, reconnecting to an earlier introduced idea which places concepts, other than sensory-perceptual events, in the realm of so-called high-level cognition. Concepts are not only stored in long-term memory, they are also capable of entering into cognitive processes that are “flexible”, rather than “hardwired”. Subdistinctions and explanations are provided that hopefully make the relevant notions workably precise. Part III of the dissertation moves on to engage in more specific debates in the theory of concepts. In one way or another, all three chapters in this part take as their points of departure the influential compositionality arguments against prototype theory often reiterated by Fodor, until recently the agenda-setting concept theorist in the philosophy of psychology. The chapters jointly aim to identify and correct a number of errors committed in the context of this debate: in the basic, generally accepted, presuppositions of these arguments (chapter 6); in the topography of concept-theoretical positions assumed by Fodor and adopted by subsequent commentators (chapter 7); and in the followup comments with which Fodor has intended to support and supplement these arguments (chapter 8). (shrink)

The study of word meanings promises important insights into the nature of the human mind by revealing what people find to be most cognitively significant in their experience. However, as we learn more about the semantics of various languages, we are faced with an interesting problem. Different languages seem to be telling us different stories about the mind. For example, important distinctions made in one language are not necessarily made in others. What are we to make of these cross-linguistic differences? (...) How do they arise? Are they created by purely linguistic processes operating over the course of language evolution? Or do they reflect fundamental differences in thought? In this sea of differences, are there any semantic universals? Which categories might be given by the genes, which by culture, and which by language? And what might the cross-linguistic similarities and differences contribute to our understanding of conceptual and linguistic development? The kinds of mapping principles, structures, and processes that link language and non-linguistic knowledge must accommodate not just one language but the rich diversity that has been uncovered. The integration of knowledge and methodologies necessary for real progress in answering these questions has happened only recently, as experimental approaches have been applied to the cross-linguistic study of word meaning. In Words and the Mind, Barbara Malt and Phillip Wolff present evidence from the leading researchers who are carrying out this empirical work on topics as diverse as spatial relations, events, emotion terms, motion events, objects, body-part terms, causation, color categories, and relational categories. By bringing them together, Malt and Wolff highlight some of the most exciting cross-linguistic and cross-cultural work on the language-thought interface, from a broad array of fields including linguistics, anthropology, cognitive and developmental psychology, and cognitive neuropsychology. Their results provide some answers to these questions and new perspectives on the issues surrounding them. (shrink)

In der 1970 gegründeten Reihe erscheinen Arbeiten, die philosophiehistorische Studien mit einem systematischen Ansatz oder systematische Studien mit philosophiehistorischen Rekonstruktionen verbinden. Neben deutschsprachigen werden auch englischsprachige Monographien veröffentlicht. Gründungsherausgeber sind: Erhard Scheibe (Herausgeber bis 1991), Günther Patzig (bis 1999) und Wolfgang Wieland (bis 2003). Von 1990 bis 2007 wurde die Reihe von Jürgen Mittelstraß mitherausgegeben.

Algorithms have developed into somewhat of a modern myth. On the one hand, they have been depicted as powerful entities that rule, sort, govern, shape, or otherwise control our lives. On the other hand, their alleged obscurity and inscrutability make it difficult to understand what exactly is at stake. What sustains their image as powerful yet inscrutable entities? And how to think about the politics and governance of something that is so difficult to grasp? This editorial essay provides a critical (...) backdrop for the special issue, treating algorithms not only as computational artifacts but also as sensitizing devices that can help us rethink some entrenched assumptions about agency, transparency, and normativity. (shrink)

The received wisdom on ability modals is that they differ from their epistemic and deontic cousins in what inferences they license and better receive a universal or conditional analysis instead of an existential one. The goal of this paper is to sharpen the empirical picture about the semantics of ability modals, and to propose an analysis that explains what makes the can of ability so special but that also preserves the crucial idea that all uses of can share a common (...) lexical semantics. The resulting framework combines tools and techniques from dynamic and inquisitive semantics with insights from the literature of the role of agency in deontic logic. It explains not only why the can of ability, while essentially being an existential modal operator, sometimes resists distribution over disjunction and interacts with its duals in particular and hitherto unnoticed ways, but also has a tendency to license free choice inferences. (shrink)

This paper offers a unified semantic explanation of two observations that prove to be problematic for classical analyses of modals, conditionals, and disjunctions: the fact that disjunctions scoping under possibility modals give rise to the free choice effect and the fact that counterfactuals license simplification of disjunctive antecedents. It shows that the data are well explained by a dynamic semantic analysis of modals and conditionals that uses ideas from the inquisitive semantic tradition in its treatment of disjunction. The analysis explains (...) why embedding a disjunctive possibility under negation reverts disjunction to its classical behavior, is general enough to predict less studied simplification patterns, and also makes progress toward a unified perspective on the distinction between informative, inquisitive, and attentive content. (shrink)

In the 1920s, Leo Lowenthal mustered the courage and the nonchalance to point literary studies in a direction which, had die discipline in Germany at diat time taken heed, would have spared it a great deal of repetition forty years later. In looking at his career, we must consider how diese early efforts were subject to a consolidation and historical elaboration dirough Lowendial's involvement with the Institute of Social Research in Frankfurt and dien in New York. We ought to consider (...) mat mere is today a need for a social historian who understands diat literature contains the history of bourgeois society — including all of its sufferings, shortcomings and hopes — better than the traditional sources of political history. (shrink)

High‐throughput genomic technologies are revolutionizing human genetics. So far the focus has been on the 1.5% of the genome, which is coding, in spite of the fact that the great majority of genomic variants fall outside the coding regions. Recent efforts to annotate the non‐coding sequence show that over 80% of the genome is biochemically active. The genome is divided into regulatory domains consisting of sequence regions that enhance and/or silence the expression of nearby genes and are, in some cases, (...) separated by boundaries with insulator activity. In this paper, we review the recent advances in the identification of variations that influence gene regulation and their consequences for human disease. We hypothesize that structural variations outside of the coding genome can interfere with normal gene regulation by disrupting the regulatory landscape. Therefore, the regulatory landscape of the genome has also to be taken into consideration when investigating the pathology of human disease. (shrink)

Schulz has shown that the suppositional view of indicative conditionals leads to a corresponding view of epistemic modals. But his case backfires: the resulting theory of epistemic modals gets the facts wrong, and so we end up with a good argument against the suppositional view. I show how and why a dynamic view of indicative conditionals leads to a better theory of epistemic modals.

Every adequate semantics for conditionals and deontic ought must offer a solution to the miners paradox about conditional obligations. Kolodny and MacFarlane have recently argued that such a semantics must reject the validity of modus ponens. I demonstrate that rejecting the validity of modus ponens is inessential for an adequate solution to the paradox.

To what extent, if at all, should a just society adopt public policies that regulate and limit the amount of time people work? Attempts to answer this question face a dilemma: Either, we can adopt a laissez-faire view, according to which governments must refrain from imposing working time policies on the labour market. But this view generates a situation in which many citizens experience deep regret about the balance between work and leisure in their lives. Or, we can endorse an (...) interventionist view that advocates government imposition of working time policies. However, such a view appears to be objectionably perfectionist insofar as it imposes on citizens a particular conception of the ideal balance between work and leisure. This article proposes a way out of this dilemma. It shows that the interventionist view can be defended on the anti-perfectionist grounds that this helps address a collective action problem in the labour market – the working time rat race. Employers often use working time as a proxy for their employees’ productivity and commitment. Those who work particularly long hours are often awarded benefits such as raises or promotions or are spared from dismissals. This makes it individually rational for each worker to work extra hours in an attempt to outcompete colleagues. However, if many workers pursue this strategy, it loses its effectiveness. Workers with preferences for more leisure have a claim to state intervention to remove the rat race when this doesn’t impose disproportionate harm on third parties. (shrink)

A dynamic semantics for iffy oughts offers an attractive alternative to the folklore that Chisholm's paradox enforces an unhappy choice between the intuitive inference rules of factual and deontic detachment. The first part of the story told here shows how a dynamic theory about ifs and oughts gives rise to a nonmonotonic perspective on deontic discourse and reasoning that elegantly removes the air of paradox from Chisholm's puzzle without sacrificing any of the two detachment principles. The second part of the (...) story showcases two bonus applications of the framework suggested here: it offers a response to Forrester's gentle murder paradox and avoids Kolodny and MacFarlane's miners paradox about deontic reasoning under epistemic uncertainty. A comparison between the dynamic semantic proposal made in this paper and a more conservative approach combining a static semantics with a dynamic pragmatics is provided. (shrink)

Machery (2009) has proposed that the notion of ‘concept’ ought to be eliminated from the theoretical vocabulary of psychology. I raise three questions about his argument: (1) Is there a meaningful distinction between concepts and background knowledge? (2) Do we need to discard the hybrid view? (3) Are there really categories of things in the world that are the basis for concepts? Although I argue that the answer to all three is ‘no’, I agree with Machery's conclusion that seeking a (...) single characterization of concepts will not be fruitful for understanding cognitive representations and processes. (shrink)

Biogeography is a multidisciplinary field with multiple origins in 19th century taxonomic practice. The Origins of Biogeography presents a revised history of early biogeography and investigates the split in taxonomic practice, between the classification of taxa and the classification of vegetation. This book moves beyond the traditional belief that biogeography is born from a synthesis of Darwin and Wallace and focuses on the important pioneering work of earlier practitioners such as Zimmermann, Stromeyer, de Candolle and Humboldt. Tracing the academic history (...) of biogeography over the decades and centuries, this book recounts the early schisms in phyto and zoogeography, the shedding of its bonds to taxonomy, its adoption of an ecological framework, and its beginnings at the dawn of the 20th century. This book assesses the contributions of key figures such as Zimmermann, Humboldt and Wallace, and reminds us of the forgotten influence of plant and animal geographers including Stromeyer, Prichard and de Candolle, whose early attempts at classifying animal and plant geography would inform later progress. The Origins of Biogeography is a science historiography aimed at biogeographers, who have little access to a detailed history of the practices of early plant and animal geographers. This book will also reveal how biological classification has shaped 18th and 19th century plant and animal geography and why it is relevant to the 21st biogeographer. (shrink)

English summary: As a functioning part of the human body and mind, our internal information technology systems belong to our physical makeup just as much as body parts and substances do to the realm of reproductive medicine, genetic information does to gene technology and brain scans do to neurological technology. Bio-information law concerns itself with the rights of these roving human components. German description: Bio- und Informationstechnologien generieren standig neue, bislang kaum fur moglich gehaltene Verhaltnisse, Verknupfungen und Anschlusse zwischen Technischem (...) und Lebendigem. Im Recht werfen diese technisch-lebendigen Assoziationen grundsatzliche Fragen auf, wenn es beispielsweise darum geht, welche Personlichkeits- oder Eigentumsrechte an extrakorporal gelagerten Korpersubstanzen oder auch an genetischer Information bestehen. Ebenso hat das Recht eine Antwort darauf zu finden, welche Bedeutung neuronalen Daten und Abbildungen von Hirnaktivitaten, etwa fur den Beweis psychischer Schadigungen im Schmerzensgeldprozess, zukommt. Und nicht zuletzt erhebt sich die keineswegs mehr abwegige Rechtsfrage, ob der Eingriff in ein informationstechnisches System als personlichkeitsverletzend gelten darf, weil dieses womoglich wie ein ausgelagerter Teil des Korpers zu behandeln ist. Malte Gruber untersucht, wie sich diese Problemstellungen auf die privatrechtlichen Deutungen von Person, Sache und Rechtsverhaltnis auswirken und dabei ein technologieubergreifendes Recht formieren: Bioinformationsrecht handelt von der engen, untrennbaren Verbindung informationstechnisch-artifizieller und korperlich-lebendiger, gewissermassen kunstlicher und naturlicher Prozesse, von Expansionstechnologien und bioartifiziellen Rechtsverhaltnissen, in denen sich die Personlichkeit des Menschen in technisierter Verfassung entfaltet. (shrink)

Folklore has it that Sobel sequences favor a variably strict analysis of conditionals over its plainly strict alternative. While recent discussions for or against the lore have focussed on Sobel sequences involving counterfactuals, this paper draws attention to the fact that indicative Sobel sequences are just as felicitous as are their counterfactual cousins. The fact, or so I shall argue here, disrupts the folklore: given minimal assumptions about the semantics and pragmatics of indicative conditionals, a textbook variably strict analysis fails (...) to predict that indicative Sobel sequences are felicitous. The correct lesson to draw from Sobel sequences is that their felicity challenges classical implementations of the variably strict and of the plainly strict analysis alike. In response to this challenge I develop a dynamic strict analysis of conditionals that handles indicative Sobel sequences with grace while preserving intuitive constraints on the semantics and pragmatics of their members. A discussion of how such an analysis may handle the challenge from reverse Sobel sequences is provided. (shrink)

In dem Band werden erstmals Grundlagentexte zur Phänomenologischen Erziehungswissenschaft von ihren Anfängen bis in die Gegenwart zusammengestellt. Die Sammlung gibt einen Überblick über Struktur, Entwicklung und Ausdifferenzierung der phänomenologischen Bewegung in der deutschsprachigen Pädagogik in den Feldern systematische Pädagogik, Bildungs-, Lern- und Erziehungstheorie, Pädagogik der frühen Kindheit, Schul- und Sonderpädagogik und der Erwachsenenbildung. Der Inhalt • Anfänge Phänomenologischer Erziehungswissenschaft • Anthropologie und Phänomenologische Erfahrungstheorie des Lernens und Erziehens • Koexistentiale Phänomenologie der Erziehung und Strukturpädagogik • Fremdheit und Andersheit im Lernen (...) und Umlernen • Aktuelle Ansätze Phänomenologischer Erziehungswissenschaft Die Zielgruppen Erziehungs- und Sozialwissenschaften, Erziehungs- und Bildungstheorie, Philosophy of Education, Historische Erziehungswissenschaft, Anthropologie, Frühpädagogik, Rehabilitationspädagogik, Schulpädagogik Der Herausgeber Dr. Malte Brinkmann ist Professor für Allgemeine Erziehungswissenschaft an der Humboldt-Universität Berlin. (shrink)

Mindfulness meditation describes a set of different mental techniques to train attention and awareness. Trait mindfulness and extended mindfulness interventions can benefit self-control. The present study investigated the short-term consequences of mindfulness meditation under conditions of limited self-control resources. Specifically, we hypothesized that a brief period of mindfulness meditation would counteract the deleterious effect that the exertion of self-control has on subsequent self-control performance. Participants who had been depleted of self-control resources by an emotion suppression task showed decrements in self-control (...) performance as compared to participants who had not suppressed emotions. However, participants who had meditated after emotion suppression performed equally well on the subsequent self-control task as participants who had not exerted self-control previously. This finding suggests that a brief period of mindfulness meditation may serve as a quick and efficient strategy to foster self-control under conditions of low resources. (shrink)

The notion of a recognitional concept (RC) is stated precisely and shown to be unrelated to the proper notion of a perceptually based concept, defining of concept empiricism. More fundamentally, it is argued that the notion of an RC does not reflect a potentially sensible candidate theory of concepts at all and therefore ought to be abandoned from concept-theoretical discourse. In the later parts of the paper, it is shown independently of these points that Fodor's attacks on RCs are in (...) all central respects based on fallacies and confusions. Thus, even if the notion of an RC were one worth defending, it could not be threatened by Fodor's attacks on it. Throughout the paper, I aim at clarification regarding the logical relations between various concept-theoretical options. (shrink)

Metaethical noncognitivists have trouble arriving at a respectable semantic theory for moral language. The goal of this article is to make substantial progress toward demonstrating that these problems may be overcome. Replacing the predominant expressivist semantic agenda in metaethics with a dynamic perspective on meaning and communication allows noncognitivists to provide a satisfying analysis of negation and other constructions that have been argued to be problematic for metaethical noncognitivism, including disjunctions. The resulting proposal preserves some of the key insights from (...) recent work on the semantics of expressivism while highlighting the widely neglected early noncognitivists' sympathies to the kind of dynamic story I intend to tell here. A comparison between the advertised dynamic semantic story and current proposals that treat expressivism as a pragmatic rather than semantic theory about moral language is provided. (shrink)

Prior research has shown a pronounced self-orientation in students of business and economics. This article examines if self-orientation can be alleviated by a focus on prosocial values in business education. In a cross-sectional design, we test the prosocial behavior and values of bachelor students at the beginning and the end of a traditional 3-year business administration program. We compare their behavior with the behavior of two different groups: students from an ethically-oriented international management school and students from a social work (...) program of equal length. The results showed that students of business administration show less prosocial behavior in a dictator game than students in the other two groups. This difference is larger between final-year students than between first-year students. According to the results of the Schwartz Value Survey, the Inglehart Index, and a scale for preferences for distributive justice, students in the three disciplines differ substantially in prosocial values, but there is no significant difference between first and last semester students of the same discipline. We conclude that there is no transmission of self-oriented behavior through self-oriented values emended in traditional business education curricula. Instead, students seem to select academic programs according to their personal and preexisting social orientations. (shrink)

Epistemic modals are a prominent topic in the literature on natural language semantics, with wide-ranging implications for issues in philosophy of language and philosophical logic. Considerations about the role that epistemic "might" and "must" play in discourse and reasoning have led to the development of several important alternatives to classical possible worlds semantics for natural language modal expressions. This is an opinionated overview of what I take to be some of the most exciting issues and developments in the field.

In diesem Band werden ausgehend von systematischen Studien zum Verhältnis von Leib, Lernen, Bildung und Erziehung neue Impulse aus der empirischen Bildungsforschung, den Neurowissenschaften und der Postphänomenologie aufgegriffen: Phänomenologische und pädagogische Perspektiven auf Leiblichkeit und Embodiment werden mit diskurs- und praxistheoretischen, neurophänomenologischen sowie Perspektiven der Gender Studies verknüpft und auf die pädagogischen Praxisfelder Digitalisierung, Schule und Kindergarten bezogen.

Metaethical noncognitivists have trouble arriving at a respectable semantic theory for moral language. The goal of this article is to make substantial progress toward demonstrating that these problems may be overcome. Replacing the predominant expressivist semantic agenda in metaethics with a dynamic perspective on meaning and communication allows noncognitivists to provide a satisfying analysis of negation and other constructions that have been argued to be problematic for metaethical noncognitivism, including disjunctions. The resulting proposal preserves some of the key insights from (...) recent work on the semantics of expressivism while highlighting the widely neglected early noncognitivists' sympathies to the kind of dynamic story I intend to tell here. A comparison between the advertised dynamic semantic story and current proposals that treat expressivism as a pragmatic rather than semantic theory about moral language is provided. (shrink)

Randomized controlled trials (RCTs) are a major success story, promising to improve science and policy. Despite some controversy, RCTs have spread toward Northern and Southern countries since the early 2000s. How so? Synthesizing previous research on this question, this article argues that favorable institutional conditions turned RCTs into “hinges” between the fields of science, politics, and business. Shifts toward behavioral economics, New Public Management, and evidence-based philanthropic giving led to a cross-fertilization among efforts in rich and poor countries, involving states, (...) international organizations, NGOs, researchers, and philanthropic foundations. This confluence of favorable institutional conditions and savvy social actors established a “global interstitial field” inside which support for RCTs has developed an unprecedented scope, influence, operational capacity, and professional payoff. However, the article further argues that the hinges holding together this global interstitial field are “squeaky” at best. Because actors inherit the illusio of their respective fields of origin—their central incentives and stakes—the interstitial field produces constant goal conflicts. Cooperation between academics and practitioners turns out to be plagued by tensions and contradictions. Based on this analysis, the article concludes that the global field of RCT support will probably differentiate into its constituent parts. As a result, RCTs may lose the special status they have gained among social science and policy evaluation methods, turning into one good technique among others. (shrink)