This paper studies a sender-receiver game in which both players want the receiver to choose the state-optimal action. Before observing the state, the sender observes a “contextual signal,” a payoff-irrelevant signal that correlates with states and is imperfectly shared with the receiver. Once the sender observes the state, the sender sends a message to the receiver, incurring a small messaging cost. It is shown that there is no miscommunication in any efficient equilibrium if the messaging cost is uniform or contextual (...) information is poorly shared between players. However, if the messaging costs are different between some messages, and contextual information can affect the probability ranking of states and is shared reasonably well, any efficient equilibrium that favors the sender exhibits miscommunication. Furthermore, the messages that cause miscommunication can be coarse or ambiguous, depending on how well players share contextual information. (shrink)

When an agent’s motivation is sensitive to how his supervisor thinks about the agent’s competence, the supervisor has to take into account both informational and expressive contents of her message to the agent. This paper shows that the supervisor can credibly express her trust in the agent’s ability only by being un- clear about what to do. Suggesting what to do, i.e., “directives,” could reveal the supervisor’s “distrust” and reduce the agent’s equilibrium effort level even though it provides useful information (...) about the decision environment. There is also an equilibrium in which directives are neutral in expressive content. However, it is shown that neologism proofness favors equilibria in which directives are double- edged swords. (shrink)

A decision maker (DM) selects a project from a set of alternatives with uncertain productivity. After the choice, she observes a signal about productivity and decides how much effort to put in. This paper analyzes the optimal decision problem of the DM who rationally filters information to deal with her post-decision cognitive dissonance. It is shown that the optimal effort level for a project can be affected by unchosen projects in her choice set, and the nature of the choice set-dependence (...) is determined by the signal structure. Some comparative statics of choice set-dependence is also provided. Finally, based on the results, the optimal choice set design is also explored. This paper offers a simple framework to explain the experimental finding in psychology that people’s effort level for a project can be enhanced when the project is chosen by themselves rather than by others. (shrink)

Since sending explicit messages can be costly, people often utilize “what is not said,” i.e., informative silence, to economize communication. This paper studies the efficient communication rule, which is fully informative while minimizing the use of explicit messages, in cooperative environments. It is shown that when the notion of context is defined as the finest mutually self-evident event that contains the current state, the efficient use of informative silence exhibits the defining property of indexicals in natural languages. While the efficient (...) use of silence could be complex, it is also found that the efficient use of silence can be as “simple” as the use of indexicals in natural languages if and only if the information structure satisfies some centrality and dominance properties. (shrink)

I investigate the complementarity of behavioral biases in a simple investment problem. The agent has incomplete knowledge about the correlation between fitness and the decision environment. Nature endows the agent with a decision procedure so that the induced action can reflect this correlation. I show that the agent with this decision procedure always exhibits (i) present biased time preference, (ii) distorted beliefs, and (iii) cognitive dissonance. The three biases are complements and the absence of one of them destroys the value (...) of the other two. The decision procedure also provides insights into the non-fungibility of savings. (shrink)

One of this century's leading works on Zen, this book is a valuable source for those wishing to understand its concepts in the context of Japanese life and art.

Wabi Sabi is the Japanese Zen philosophy that all things are imperfect, unfinished and impermanent. It is a fresh way of seeing and moving through the world when our lives, literally and figuratively, feel cluttered. This book shows us how to apply this concept in the context of daily life and offers ideas on how to see it, embrace it and incorporate it into everyday thoughts, objects and situations."--Publisher description.

Principles of Brain Evolution (Striedter 2005) places little emphasis on natural selection. However, one cannot fully appreciate the diversity of brains across species, nor the evolutionary processes driving such diversity, without an understanding of the effects of natural selection. Had Striedter included more extensive discussions about natural selection, his text would have been more balanced and comprehensive.

The target article about the origin and evolution of the isocortex triggers questions about unresolved issues that still need to be dealt with, including: (1) the evolutionary scenario of the origin of the lateral isocortex, (2) the expansion of the dorsal pallium in nonmammals, and (3) the heterogeneity of the anterior dorsal ventricular ridge.

思想家・後藤新平は、「儒服をつけた英雄」蕃山から何を学んだのか? 百年先を読んだ政治家、後藤新平(1857-1929)の思想はどのようにして培われてきたのか。後藤新平が終生の愛読書としていた熊沢蕃山(1619-91)の『集義和書』を手がかりに、思想家・後藤新平の知ら れざる中枢に切り込む。.

This special 10th anniversary edition of the David Suzuki classic, re-examines our place in the natural world in light of sweeping environmental changes and recent advances in scientific knowledge.

In the era of natural law, the foundation of the law was grounded upon something beyond the law itself, i.e., external factors such as a higher authority, nature, or even the reason and ontological essence of man. According to this reasoning, man has in effect been clandestinely elevated to an equal plain with God and operates in the external realm, essentially observing the world „from outside“. Thus, any attempt to provide a basis for legal decisions by such external factors depends (...) on an „observer„ who assumes a privileged position with respect to the law and its ground. Lawyers continue to maintain this position of interpreting the positive law by seeking the ground of the law outside of itself, i.e., the external factors such as the „source of laws“, the „intention of the author“, and the “fundamental norm“, for example. While simultaneously claiming to be under the rule of law, they paradoxically take the position of an external „observer“ who perceives the law “from outside”. This position leads us to aporia, or an insoluble contradiction, regarding external grounds. This paper proposes a means by which to emerge from the above aporia. Using the theory of social systems as its basis, the legal system is viewed as a closed system and „the ground of the law“ is by no means derived from external factors; rather, it can be stated only through an internal operation within the closed system itself. (shrink)

Spatial ability plays important roles in academic learning and everyday activities. A type of spatial thinking that is of particular significance to people's daily lives is cognitive mapping, that is, the process of acquiring, representing, and using knowledge about spatial environments. However, the skill of cognitive mapping shows large individual differences, and the task of spatial orientation and navigation poses great difficulty for some people. In this article, I look at the motivation and findings in the research into spatial knowledge (...) acquisition from an individual differences perspective. I also discuss major implications of the existence of large individual differences, particularly the possibility of improving cognitive mapping by training and adjusting navigation assistance to the wide variations in spatial aptitudes and preferences among people. (shrink)

To become more broadly applicable, positions on AI ethics require perspectives from non-Western regions and cultures such as China and Japan. In this paper, we propose that the addition of the concept of harmony to the discussion on ethical AI would be highly beneficial due to its centrality in East Asian cultures and its applicability to the challenge of designing AI for social good. We first present a synopsis of different definitions of harmony in multiple contexts, such as music and (...) society, which reveals that the concept is, at its core, about well-balanced relationships and appropriate actions which give rise to order, balance, and aesthetically pleasing phenomena. The mediator for these well-balanced relationships isTaktwhich is an ability to act thoughtfully and sensibly according to the specific situation and to put things into proportion and order. We propose that the central challenge of building harmonizing AI is to make intelligent systems tactful and also to design and use them tactfully. For an AI system to become tactful, it needs to be able to have an advanced sensitivity to the specific contexts which it is in and their social and ethical implications and have the capability of approximately inferring the emotional and cognitive states of people with whom it is interacting. (shrink)

A formal and functional study of the three meters of Old Norse eddic poetry, fornyroislag, malahattr, and ljooahattr, this book provides their systematic account (synchronic, diachronic, and from a comparative Germanic perspective). With thorough data presentation, detailed philological analysis, and sophisticated linguistic explanation, it will be of interest to Germanic philologists/linguists, medievalists, and metrists of all persuasions.".