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Full-Text Articles in Social and Behavioral Sciences

Efficiency And Stability In Large Matching Markets, Yeon-Koo Che, Olivier Tercieux Jul 2015

Efficiency And Stability In Large Matching Markets, Yeon-Koo Che, Olivier Tercieux

Cowles Foundation Discussion Papers

We study efficient and stable mechanisms in matching markets when the number of agents is large and individuals’ preferences and priorities are drawn randomly. When agents’ preferences are uncorrelated, then both efficiency and stability can be achieved in an asymptotic sense via standard mechanisms such as deferred acceptance and top trading cycles. When agents’ preferences are correlated over objects, however, these mechanisms are either inefficient or unstable even in an asymptotic sense. We propose a variant of deferred acceptance that is asymptotically efficient, asymptotically stable and asymptotically incentive compatible. This new mechanism performs well in a counterfactual calibration based on …


Inference Under Stability Of Risk Preferences, Levon Barseghyan, Francesca Molinari, Joshua C. Teitelbaum Jun 2015

Inference Under Stability Of Risk Preferences, Levon Barseghyan, Francesca Molinari, Joshua C. Teitelbaum

Georgetown Law Faculty Publications and Other Works

We leverage the assumption that preferences are stable across contexts to partially identify and conduct inference on the parameters of a structural model of risky choice. Working with data on households' deductible choices across three lines of insurance coverage and a model that nests expected utility theory plus a range of non-expected utility models, we perform a revealed preference analysis that yields household-specific bounds on the model parameters. We then impose stability and other structural assumptions to tighten the bounds, and we explore what we can learn about households' risk preferences from the intervals defined by the bounds. We further …


Thermal Stability And Properties Of Deformation-Processed Cu-Fe In Situ Composites, Keming Liu, Zhengyi Jiang, Jingwei Zhao, Jin Zou, Lei Lu, Deping Lu Jan 2015

Thermal Stability And Properties Of Deformation-Processed Cu-Fe In Situ Composites, Keming Liu, Zhengyi Jiang, Jingwei Zhao, Jin Zou, Lei Lu, Deping Lu

Faculty of Engineering and Information Sciences - Papers: Part A

This paper investigated the thermal stability, tensile strength, and conductivity of deformation-processed Cu-14Fe in situ composites produced by thermo-mechanical processing. The thermal stability was analyzed using scanning electronic microscope and transmission electron microscope. The tensile strength and conductivity were evaluated using tensile-testing machine and micro-ohmmeter, respectively. The Fe fibers in the deformation-processed Cu-14Fe in situ composites undergo edge recession, longitudinal splitting, cylinderization, break-up, and spheroidization during the heat treatment. The Cu matrix experiences recovery, recrystallization, and precipitation phase transition. The tensile strength and conductivity first increase with increasing temperature of heat treatment, reach peak values at different temperatures, and then …


A Semi-Analytical Analysis Of The Stability Of The Reversible Selkov Model, Khaled. Al Noufaey, Timothy R. Marchant, Maureen P. Edwards Jan 2015

A Semi-Analytical Analysis Of The Stability Of The Reversible Selkov Model, Khaled. Al Noufaey, Timothy R. Marchant, Maureen P. Edwards

Faculty of Engineering and Information Sciences - Papers: Part A

Semi-analytical solutions for the reversible Selkov model are developed and used to investigate its static and dynamic stability. A one-dimensional reaction-diffusion cell is considered with all steps of the Selkov reaction modeled. A coupled set of four partial differential equations is obtained for the precursor, reactant, autocatalyst and final product concentrations. The Galerkin method is applied to approximate the spatial structure of the concentrations to obtain a lower-order, ordinary differential equation model, as an approximation to the governing partial differential equations. The semi-analytical model is analysed to obtain steady-state solutions, bifurcation diagrams and parameter maps in which the different types …


Stability Of Carbon Nanotube Yarn Biofuel Cell In Human Body Fluid, Cheong Hoon Kwon, Jae Ah Lee, Young-Bong Choi, Hyug-Han Kim, Geoffrey M. Spinks, Marcio D. Lima, Ray H. Baughman, Seon Jeong Kim Jan 2015

Stability Of Carbon Nanotube Yarn Biofuel Cell In Human Body Fluid, Cheong Hoon Kwon, Jae Ah Lee, Young-Bong Choi, Hyug-Han Kim, Geoffrey M. Spinks, Marcio D. Lima, Ray H. Baughman, Seon Jeong Kim

Faculty of Engineering and Information Sciences - Papers: Part A

High performance with stability, easy-handling electrodes, and biofluid-flow controllable system with mechanical strength of the biofuel cell can be considered as the critical issues for future human body implant. These three challenges are sufficiently considered by using the effective platform regarding the high surface area from multi-walled carbon nanotube-conducting polymer with poly(3,4-ethylenedioxythiophene), and size/shape dependent flexible yarn electrodes for the implantation of biofuel cell. High power biofuel cell of mW cm-2 range in physiological condition (low glucose-containing phosphate buffered saline solution and human blood serum) controlling the stirring degree is also first demonstrated for future implantation in this study. Biofuel …


Stability Enhancement Of Magnetic Levitation Ball System With Two Controlled Electomagnets, Hai Huang, Haiping Du, Weihua Li Jan 2015

Stability Enhancement Of Magnetic Levitation Ball System With Two Controlled Electomagnets, Hai Huang, Haiping Du, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part A

Magnetic levitation ball system is a highly nonlinear and unstable system. If the system is linearised at the equilibrium point, the achievable balance range of the magnetically levitated ball is very short with one electromagnet. This paper presents an improved magnetic levitation ball system, that contains two electromagnets, where one electromagnet is set above the magnetic ball for pulling, and another one is set under the magnetic ball for pushing. In addition, this paper applies a 2-DOF (degree-of-freedom) PID (proportional-integral-derivative) controller instead of 1-DOF PID for the control of the two electromagnets so that they can work corporately to make …