Heterogeneity

2016 ◽  
Author(s):  
Jacob K. Goeree ◽  
Charles A. Holt ◽  
Thomas R. Palfrey
Keyword(s):  
Choice Behavior ◽  
Error Rates ◽  
The Other ◽  
Individual Heterogeneity ◽  
Response Functions ◽  
Quantal Response ◽  
Quantal Response Equilibrium ◽  
Skill Levels ◽  
Apparent Reason ◽  
Chess Players

Players have different skills, which has implications for the degree to which they make errors. Low-skill hitters in baseball often swing at bad pitches, beginning skiers frequently fall for no apparent reason, and children often lose at tic-tac-toe. At the other extreme, there are brilliant chess players, bargainers, and litigators who seem to know exactly what move to make or offer to decline. From a quantal response equilibrium (QRE) perspective, these skill levels can be modeled in terms of variation in error rates or in responsiveness of quantal response functions. This chapter explores issues related to individual heterogeneity with respect to player error rates. It also describes some extensions of QRE that relax the assumption that player expectations about the choice behavior of other players are correct. For example, in games that are played only once, players are not able to learn from others' prior decisions, and expectations must be based on introspection. The chapter develops the implications of noisy introspection embedded in a model of iterated thinking.

Quantal Response Equilibrium in Normal-Form Games

2016 ◽  
Author(s):  
Jacob K. Goeree ◽  
Charles A. Holt ◽  
Thomas R. Palfrey
Keyword(s):  
Normal Form ◽  
Cost Model ◽  
Reduced Form ◽  
Individual Choice ◽  
Response Functions ◽  
Quantal Response ◽  
Quantal Response Equilibrium ◽  
Control Cost ◽  
Normal Form Games ◽  
Best Response

This chapter lays out the general theory of quantal response equilibrium (QRE) for normal-form games. It starts with the reduced-form approach to QR, based on the direct specification of “regular” quantal or smoothed best-response functions required to satisfy four intuitive axioms of stochastic choice. A simple asymmetric matching pennies game is used to illustrate these ideas and show that QRE imposes strong restrictions on the data, even without parametric assumptions on the quantal response functions. Particular attention is given to the logit QRE, since it is the most commonly used approach taken when QRE is applied to experimental or other data. The discussion includes the topological and limiting properties of logit QRE and connections with refinement concepts. QRE is also related to several other equilibrium models of imperfectly rational behavior in games, including a game-theoretic equilibrium version of Luce's (1959) model of individual choice, Rosenthal's (1989) linear response model, and Van Damme's (1987) control cost model; these connections are explained in the chapter.

scholarly journals Stationary Concepts for Experimental 2 × 2 Games: Comment

2011 ◽  
Vol 101 (2) ◽  
pp. 1029-1040 ◽  
Author(s):  
Christoph Brunner ◽  
Colin F Camerer ◽  
Jacob K Goeree
Keyword(s):  
Nash Equilibrium ◽  
Loss Aversion ◽  
The Other ◽  
Quantal Response ◽  
Quantal Response Equilibrium ◽  
Equilibrium Payoff ◽  
Laboratory Results ◽  
Impulse Balance

Reinhard Selten and Thorsten Chmura (2008) recently reported laboratory results for completely mixed 2 X 2 games used to compare Nash equilibrium with four other stationary concepts: quantal response equilibrium, action-sampling equilibrium, payoff-sampling equilibrium, and impulse balance equilibrium. We reanalyze their data, correct some errors, and find that Nash clearly fits worst while the four other concepts perform about equally well. We also report new analysis of other previous experiments that illustrate the importance of the loss aversion hardwired into impulse balance equilibrium: when the other non-Nash concepts are augmented with loss aversion, they outperform impulse balance equilibrium.

Skills and Unemployment

1997 ◽  
Vol 11 (4) ◽  
pp. 299-316 ◽  
Author(s):  
J. R. Shackleton
Keyword(s):  
The Other ◽  
Skill Levels ◽  
Beneficial Effects

This article attempts to spell out the links which are assumed to exist between skills and unemployment. It is argued that the claims made for the beneficial effects of raising the skill levels of the workforce have been exaggerated. The author then goes on to indicate some of the other factors which influence unemployment levels, and sketches the relevance of this to local economic initiatives

STRADDLE-GATE TRANSISTOR: A MOSFET IN THE LIMIT OF USEFUL FIELD-EFFECT

2000 ◽  
Vol 10 (01) ◽  
pp. 231-245 ◽  
Author(s):  
SANDIP TIWARI ◽  
A. KUMAR ◽  
J. J. WELSER
Keyword(s):  
Field Effect ◽  
Field Effect Transistor ◽  
Oxide Thickness ◽  
Error Rates ◽  
Soft Error ◽  
The Other ◽  
Power Gain ◽  
Virtual Source ◽  
Effect Transistor ◽  
Output Conductance

For transistor, the limit of usable field-effect is defined by tunneling between the source and the drain - the mechanism that competes with field-effect as device dimensions shrink to near deBroglie wavelength. This is a more fundamental constraint in the operation of a field-effect transistor than random dopants, oxide thickness, doping magnitudes and depth, gate resistivity, soft-error rates, etc. We describe here a MOSFET structure, the straddle-gate transistor, that uses inversion regions as virtual source and drain, operates within the limits placed by the other constraints, and operates at acceptable power levels with good power gain and output conductance at 10 nm channel lenth. Experimental behavior of the straddle geometry are also described to summarized the advantages accrued using electron injection from the thin inversion regions.

scholarly journals Choice-Driven Counterfactuals

2021 ◽  
Author(s):  
Ilaria Canavotto ◽  
Eric Pacuit
Keyword(s):  
Choice Behavior ◽  
The Other ◽  
Philosophical Literature ◽  
Stit Logic

AbstractIn this paper, we investigate the semantics and logic of choice-driven counterfactuals, that is, of counterfactuals whose evaluation relies on auxiliary premises about how agents are expected to act, i.e., about their default choice behavior. To do this, we merge one of the most prominent logics of agency in the philosophical literature, namely stit logic (Belnap et al. 2001; Horty 2001), with the well-known logic of counterfactuals due to Stalnaker (1968) and Lewis (1973). A key component of our semantics for counterfactuals is to distinguish between deviant and non-deviant actions at a moment, where an action available to an agent at a moment is deviant when its performance does not agree with the agent’s default choice behavior at that moment. After developing and axiomatizing a stit logic with action types, instants, and deviant actions, we study the philosophical implications and logical properties of two candidate semantics for choice-driven counterfactuals, one called rewind models inspired by Lewis (Nous13(4), 455–476 1979) and the other called independence models motivated by well-known counterexamples to Lewis’s proposal Slote (Philos. Rev.87(1), 3–27 1978). In the last part of the paper we consider how to evaluate choice-driven counterfactuals at moments arrived at by some agents performing a deviant action.

Natural Shell

2016 ◽  
Vol 5 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Xiao Liu ◽  
Yufei Jiang ◽  
Lawrence Wu ◽  
Dinghao Wu
Keyword(s):  
Natural Language ◽  
End Users ◽  
The Other ◽  
Prototype System ◽  
Online Forums ◽  
Skill Levels ◽  
Scripting Languages ◽  
Other Hand

Scripting is a widely-used way to automate the execution of tasks. Despite the popularity of scripting, it remains difficult to use for both beginners and experts: because of the cryptic commands for the first group, and incompatible syntaxes across different systems, for the latter group. The authors introduce Natural Shell, an assistant for enabling end-users to generate commands and scripts for various purposes. Natural Shell automatically synthesizes scripts for different shell systems based on natural language descriptions. By interacting with Natural Shell, new users can learn the basics of scripting languages without the obstacles from the incomprehensible syntaxes. On the other hand, the authors' tool frees more advanced users from manuals when they switch shell systems. The authors have developed a prototype system and demonstrate its effectiveness with a benchmark of 50 examples of popular shell commands collected from online forums. In addition, the authors analyzed the usage of Natural Shell in a lab study that involves 10 participants with different scripting skill levels. Natural Shell effectively assists the users to generate commands in assigned syntaxes and greatly streamlines their learning and using experience.

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