scholarly journals Ascending Prices and Package Bidding: A Theoretical and Experimental Analysis

2010 ◽  
Vol 2 (3) ◽  
pp. 160-185 ◽  
Author(s):  
John H Kagel ◽  
Yuanchuan Lien ◽  
Paul Milgrom
Keyword(s):  
Experimental Analysis ◽  
Combinatorial Auctions ◽  
Experimental Support ◽  
Package Bidding ◽  
Core Allocations ◽  
Theory And Experiment

We use theory and experiment to explore the performance of multi-round, price-guided, combinatorial auctions. We define efficiency-relevant and core-relevant packages and show that if bidders bid aggressively on these and losing bidders bid to their limits, then the auction leads to efficient or core allocations. We study the theoretically relevant behaviors and hypothesize that subjects will make only a few significant bids, and that certain simulations with auto-bidders will predict variations in performance across different environments. Testing the combinatorial clock auction (CCA) design, we find experimental support for these two hypotheses. We also compare the CCA to a simultaneous ascending auction. (JEL D44)

Ascending prices and package bidding: Further experimental analysis

2014 ◽  
Vol 85 ◽  
pp. 210-231 ◽  
Author(s):  
John H. Kagel ◽  
Yuanchuan Lien ◽  
Paul Milgrom
Keyword(s):  
Experimental Analysis ◽  
Package Bidding

scholarly journals An Experimental Test of Flexible Combinatorial Spectrum Auction Formats

2010 ◽  
Vol 2 (1) ◽  
pp. 39-57 ◽  
Author(s):  
Christoph Brunner ◽  
Jacob K Goeree ◽  
Charles A Holt ◽  
John O Ledyard
Keyword(s):  
Experimental Test ◽  
Laboratory Experiments ◽  
Laboratory Data ◽  
Combinatorial Auctions ◽  
Combinatorial Auction ◽  
Policy Makers ◽  
Spectrum Auction ◽  
Package Bidding ◽  
Improved Performance ◽  
Auction Formats

This paper reports laboratory experiments that evaluate the performance of a flexible package bidding format developed by the FCC, in comparison with other combinatorial formats. In general, the interest of policy makers in combinatorial auctions is justified by the laboratory data. When value complementarities are present, package bidding yields improved performance. We find clear differences among the combinatorial auction formats both in terms of efficiency and seller revenue, however. Notably, the combinatorial clock provides the highest revenue. The FCC's flexible package bidding format performed worse than the alternatives, which is one of the main reasons why it was not implemented. (JEL D44, H82)

CVM Simulation of the Resistivity in L10 and L12 Co-Pt Intermetallic Compounds

1990 ◽  
Vol 213 ◽  
Author(s):  
J.M. Sanchez ◽  
M.C. Cadeville ◽  
V. Pierron-Bohnes
Keyword(s):  
Phase Diagram ◽  
Statistical Model ◽  
Temperature Dependence ◽  
Experimental Analysis ◽  
Magnetic Order ◽  
Experimental Studies ◽  
Spin Model ◽  
Spin Disorder ◽  
Magnetic Disorder ◽  
Theory And Experiment

ABSTRACTThe contributions of the atomic and spin disorder to the resistivity of two intermetallic Co1−x Ptx (x=0.5 and 0.7) compounds have been previously determined from experimental studies and separated from the phonon contribution. Now, the atomic and magnetic contributions and their variation with temperature through the Curie and order-disorder transitions are analyzed using a statistical model. The components of the resistivity are described as sums of resistivities of individual tetrahedral clusters. The cluster probabilities are calculated in a magnetic (up and down spin model) CVM approximation, the parameters of which are those that reproduce the experimental Co-Pt phase diagram. The contribution of chemically (magnetically) ordered clusters to the resistivity due to the chemical (magnetic) disorder are taken equal to zero. It is the temperature dependence of all other cluster probabilities which determine the resistivity behavior. Although there are severe approximations in both the experimental analysis and the statistical model, the agreement between theory and experiment is very satisfactory, underscoring the strong interplay between chemical and magnetic order in such ferromagnetic compounds.

The Informational Theory of Legislative Committees: An Experimental Analysis

2018 ◽  
Vol 113 (1) ◽  
pp. 55-76 ◽  
Author(s):  
MARCO BATTAGLINI ◽  
ERNEST K. LAI ◽  
WOOYOUNG LIM ◽  
JOSEPH TAO-YI WANG
Keyword(s):  
Information Transmission ◽  
Experimental Analysis ◽  
Relevant Information ◽  
Status Quo ◽  
Experimental Support ◽  
Legislative Committees

We experimentally investigate the informational theory of legislative committees (Gilligan and Krehbiel 1989). Two committee members provide policy-relevant information to a legislature under alternative legislative rules. Under the open rule, the legislature is free to make any decision; under the closed rule, the legislature chooses between a member’s proposal and a status quo. We find that even in the presence of biases, the committee members improve the legislature’s decision by providing useful information. We obtain evidence for two additional predictions: the outlier principle, according to which more extreme biases reduce the extent of information transmission; and the distributional principle, according to which the open rule is more distributionally efficient than the closed rule. When biases are less extreme, we find that the distributional principle dominates the restrictive-rule principle, according to which the closed rule is more informationally efficient. Overall, our findings provide experimental support for Gilligan and Krehbiel’s informational theory.

Electrostatic optics and aberration correction in the 1940s and today

1992 ◽  
Vol 50 (1) ◽  
pp. 6-7
Author(s):  
Gertrude F. Rempfer
Keyword(s):  
Electron Microscope ◽  
Focal Point ◽  
Focal Length ◽  
High Vacuum ◽  
Electron Optics ◽  
Applied Physics ◽  
Electrostatic Lenses ◽  
Commercial Instrument ◽  
The University ◽  
Theory And Experiment

I became involved in electron optics in early 1945, when my husband Robert and I were hired by the Farrand Optical Company. My husband had a mathematics Ph.D.; my degree was in physics. My main responsibilities were connected with the development of an electrostatic electron microscope. Fortunately, my thesis research on thermionic and field emission, in the late 1930s under the direction of Professor Joseph E. Henderson at the University of Washington, provided a foundation for dealing with electron beams, high vacuum, and high voltage.At the Farrand Company my co-workers and I used an electron-optical bench to carry out an extensive series of tests on three-electrode electrostatic lenses, as a function of geometrical and voltage parameters. Our studies enabled us to select optimum designs for the lenses in the electron microscope. We early on discovered that, in general, electron lenses are not “thin” lenses, and that aberrations of focal point and aberrations of focal length are not the same. I found electron optics to be an intriguing blend of theory and experiment. A laboratory version of the electron microscope was built and tested, and a report was given at the December 1947 EMSA meeting. The micrograph in fig. 1 is one of several which were presented at the meeting. This micrograph also appeared on the cover of the January 1949 issue of Journal of Applied Physics. These were exciting times in electron microscopy; it seemed that almost everything that happened was new. Our opportunities to publish were limited to patents because Mr. Farrand envisaged a commercial instrument. Regrettably, a commercial version of our laboratory microscope was not produced.

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