In this article three different types of loss aversion equilibria in bimatrix games are studied. Loss aversion equilibria are Nash equilibria of games where players are loss averse and where the reference points—points below which they consider payoffs to be losses—are endogenous to the equilibrium calculation. The first type is the fixed point loss aversion equilibrium, introduced in Shalev (2000; Int. J. Game Theory 29(2):269) under the name of ‘myopic loss aversion equilibrium.’ There, the players’ reference points depend on the (...) beliefs about their opponents’ strategies. The second type, the maximin loss aversion equilibrium, differs from the fixed point loss aversion equilibrium in that the reference points are only based on the carriers of the strategies, not on the exact probabilities. In the third type, the safety level loss aversion equilibrium, the reference points depend on the values of the own payoff matrices. Finally, a comparative statics analysis is carried out of all three equilibrium concepts in 2 × 2 bimatrix games. It is established when a player benefits from his opponent falsely believing that he is loss averse. (shrink)

In December 1924 when Simone de Beauvoir almost certainly wrote her essay analyzing Claude Bernard's "Introduction to the Study of Experimental Medicine," a classic text in the philosophy of science, she was a 16 yr old student in a senior-level philosophy class at a private Catholic girls' school. Given the popular conception of existentialism as anti science, Beauvoir's early interest in science, reflected in her baccalaureate successes as well as her paper on Bernard, may be surprising. But her enthusiasm for (...) Bernard is unmistakable. We have identified three themes in Beauvoir's essay that reappear in her later work, including the valuing of philosophical doubt. (shrink)

Scientific policy advice is usually perceived as a formalized advisory process within political institutions. Politics has benefited from this arrangement because the science-based rationalization of policy has contributed to its legitimacy. However, in Western democratic societies, scientific expertise that is routinely mobilized to legitimate political positions has increasingly lost its power due to controversial expertise in the public sphere in particular within the mass media. As a consequence of the medialization of science, political decision makers are increasingly confronted with mass-mediated (...) expertise. Empirical results of a qualitative survey among decision makers in the German political and administrative system, presented in this article, support the hypothesis that mass-mediated expertise has a significant impact on policy processes. Five functions of media coverage on science-based issues for policy making were identified. Mass-mediated expertise has therefore altered the established relations between scientific policy advisors and political decision makers and can be seen as informal policy advice complementing institutionalized advisory arrangements. (shrink)

We call a decision maker risk averse for losses if that decision maker is risk averse with respect to lotteries having alternatives below a given reference alternative in their support. A two-person bargaining solution is called invariant under risk aversion for losses if the assigned outcome does not change after correcting for risk aversion for losses with this outcome as pair of reference levels, provided that the disagreement point only changes proportionally. We present an axiomatic characterization of the Nash bargaining (...) solution based on this condition, and we also provide a decision-theoretic characterization of the concept of risk aversion for losses. (shrink)

We consider choice correspondences that assign a subset to every choice set of alternatives, where the total set of alternatives is an arbitrary finite or infinite set. We focus on the relations between several extensions of the condition of independence of irrelevant alternatives on one hand, and conditions on the revealed preference relation on sets, notably the weak axiom of revealed preference, on the other hand. We also establish the connection between the condition of independence of irrelevant alternatives and so-called (...) strong sets; the latter characterize a social choice correspondence satisfying independence of irrelevant alternatives. (shrink)

While caregiving in northern, rural and remote communities takes place in the context of conditions unique to smaller communities, caregivers live with social policies that are shaped by urban norms rather than rural realities. In times of economic decline and government cuts rural issues of limited services and infrastructure as well as dependency on a single industry can lead to unemployment, community and family instability, and a decline in health and well-being. During these times caregivers face increased pressure to voluntarily (...) fill the gaps left by service cuts. Research with women caregivers in four communities in northern British Columbia (BC), Canada explores the experiences of caring and the social, geographic, economic and political contexts within which the caregiving occurs. The discourse of economic efficiencies that speaks solely to the monetary value of care is contrasted with the human condition of connectedness and relationships. These two contradictory perspectives are uncovered during interviews with women caregivers and analyzed in the framework of Olena Hankivsky's discussion of an ethic of care. (shrink)

Nash equilibria with identical supports are compared for bimatrix games that are different with respect to the risk aversion of player 2. For equilibria in 2× 2-bimatrix games and for equilibria with efficient supports in coordination games it is established for which cases increased risk aversion of player 2 benefits or hurts player 2.

Social work and other professions struggle with the roles of knowledge and values in the study of society and human lives, and in professional practice. Discussions of this topic range from those who see relatively clear distinctions between these concepts and those for whom the lines between the concepts are blurred. For those who separate theory and knowledge from values and ethics there is further discussion in the literature on which is the appropriate foundation for social work practice. The following (...) discussion examines two arguments: firstly, that these concepts, and the two camps they can be placed into, are distinct and should be kept separate; and secondly, the alternative perspective that the concepts overlap and that the separation into two camps is false. The analysis here outlines these perspectives and suggests reasons why shades of both are necessary to fully understand and participate in the reality of social work as a profession and an academic discipline. (shrink)