AI in a mini-lab or putting precision to the test
Peer-Reviewed Publication
Updates every hour. Last Updated: 27-Apr-2025 11:08 ET (27-Apr-2025 15:08 GMT/UTC)
Purpose
We estimate the marginal cost curve of each dealer in each auction, based on structural models of the multiunit discriminatory-price auction.
Design/methodology/approach
Auction theory has ambiguous implications regarding the relative performance of three formats of multiunit auctions: uniform-price, discriminatory-price and Vickrey auctions. We evaluate the performance of these three auction formats using bid-level data of the Federal Reserve’s purchase auctions of agency MBS from June 2014 through November 2014.
Findings
Our results suggest that neither uniform-price nor Vickrey auctions outperform discriminatory-price auctions in terms of the total expenditure. However, Vickrey auctions outperform discriminatory-price auctions in terms of efficiency, with the efficiency gain around 0.74% of the surplus that dealers extract on average.
Originality/value
To the best of our knowledge, this paper provides the first structural analysis of the auctions used by the Federal Reserve in implementing its monetary policies.
How gravity causes a perfectly spherical ball to roll down an inclined plane is part of elementary school physics canon. But the world is messier than a textbook.
Scientists in the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have sought to quantitatively describe the much more complex rolling physics of real-world objects. Led by Professor L. Mahadevan, they combined theory, simulations, and experiments to understand what happens when an imperfect, spherical object is placed on an inclined plane.
Researchers at Osaka Metropolitan University have developed a straightforward method for predicting the measurement precision of fringe projection photogrammetry.
Key findings
• Sarcoidosis patients are prone to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, increased severity, morbidity and greater mortality of coronavirus disease 2019 (COVID-19).
What is known and what is new?
• Subjects with sarcoidosis are more vulnerable to SARS-CoV-2 infection.
• Severity of COVID-19 was also more serious in subjects stricken with sarcoidosis.
What is the implication, and what should change now?
• Vaccination against SARS-CoV-2 for sarcoidosis may be a compulsory measure.