297 Works

Fedora Update: Building Community, Building Software

Robert T. Cartolano, Tom Cramer, Jonathan Markow & Robin Ruggaber
Fedora (Flexible Extensible Digital Object Repository Architecture) is a community driven, open source repository system under the stewardship of the DuraSpace not-for-profit organization. In October 2012, Fedora stakeholders joined together to accelerate the development of Fedora and expand community involvement and investment, and, at CNI’s December 2012 membership meeting, the group launched a three-year project to implement a new platform. Fedora 4 is being developed as an international, community-sourced initiative that will support traditional repository...

The Information Architecture of Emergency Response

Noreen Y. Whysel
This presentation at the 2012 Information Architecture Summit, explored the evolution of technology in emergency response, with a special focus on advances in geographic systems, incident management, social media and policy in New York City since September 11, 2001. What technologies do emergency responders in NYC use? How have events like 9/11 and other incidents influenced technology advances? What effect, if any, has the change from a Law Enforcement Mayor to a Media Mayor had...

Timeline of NYC OEM Emergency Incidents and Technology Advances since 2001

Noreen Y. Whysel
Timeline of technology advances at the NYC Office of Emergency Management. Period One - Pre-9/11: Characterized by the establishment of the Mayor’s Office of Emergency Management, the beginnings of a central GIS unit, release of a common NYC Basemap and the first mobile command vehicle. Control of data and systems still largely held by individual agencies. Period Two - 2001-2005: Characterized by development of information systems to support interagency cooperation and response management. As of...

Firm-Specific Capital and the New Keynesian Phillips Curve

Michael Woodford
A relation between inflation and the path of average marginal cost (often measured by unit labor cost) implied by the Calvo (1983) model of staggered pricing—sometimes referred to as the “New Keynesian” Phillips curve—has been the subject of extensive econometric estimation and testing. Standard theoretical justifications of this form of aggregate-supply relation, however, either assume (1) the existence of a competitive rental market for capital services, so that the shadow cost of capital services is...

Japan’s Abenomics: Recovery Leading to Good Growth?

Hugh T. Patrick
As Japan enters an era of political stability under Prime Minister Shinzo Abe, Japan is poised to recover from the past two decades of mediocre performance toward good, sustained economic growth. Abe, a strong leader who will not be replaced until at least 2016, is giving priority to a much‐touted economic program termed Abenomics, comprising three “arrows”: ending deflation and achieving price stability, defined as a 2 percent annual increase in the CPI; achieving stable,...

\"Our Hidden Treasure at Columbia University,” The Silver Collection

Caroline Rubinstein
Always looking for silver objects and collections to write about has taken me to Europe including France, Belgium, England, and Italy and in United States including San Antonio Museum of Art, Hispanic Society of America (New York), and Columbia University. The collection at Columbia University has many historically important silver objects that were either donated or bequested to King’s College, Columbia College and Columbia University. When inquiring about writing about the University’s collection, I was...

Financial Market Efficiency and the Effectiveness of Monetary Policy

Michael Woodford
From page 85-- 'Improvements in information processing technology and deregulation, among other forces, are profoundly transforming the financial sector of the United States and other advanced economies. Many of these changes are likely to improve the efficiency of financial intermediation, in the sense that the dispersion of valuations of claims to future payments across different individuals and institutions is minimized. For familiar reasons, this should be generally beneficial for the allocation of resources in the...

Inflation Targeting and Optimal Monetary Policy

Michael Woodford
From page 15-- 'Here I survey some of the most important conclusions of this literature. I shall begin by reviewing some of the respects in which inflation targeting as currently implemented represents a step toward what the theory of optimal monetary policy would recommend. In the final section of the paper, I then summarize some of the more important respects in which an optimal policy regime would go beyond current practice. Finally, as a concrete...

Conventional and Unconventional Monetary Policy

Vasco Cúrdia & Michael Woodford
The authors extend a standard New Keynesian model to incorporate heterogeneity in spending opportunities and two sources of (potentially time-varying) credit spreads and to allow a role for the central bank’s balance sheet in equilibrium determination. They use the model to investigate the implications of imperfect financial intermediation for familiar monetary policy prescriptions, and to consider additional dimensions of central bank policy—variations in the size and composition of the central bank’s balance sheet and payment...

Weak Cartels and Collusion-Proof Auctions

Yeon-Koo Che, Daniele Condorelli & Jinwoo Kim
We study collusion in a large class of private-value auctions by cartels whose members cannot exchange monetary transfers among themselves (i.e., weak cartels). We provide a complete characterization of outcomes that are implementable in the presence of weak cartels, and identify optimal collusion-proof auctions for symmetric value distributions. When the density is single-peaked, the optimal collusion-proof auction can be implemented by a procedure that combines a second-price auction with a sequential one-on- one negotiation.

Nonstandard Indicators for Monetary Policy: Can Their Usefulness Be Judged from Forecasting Regressions?

Michael Woodford
From the chapter: "In recent years there has been a great deal of interest in proposals to use nonstandard indicator variables as a guide to the conduct of monetary policy. By nonstandard indicators I mean indicators other than the various measures of the money supply that the Federal Reserve System computes, and to which academic economists in the monetarist tradition have long directed their attention, and other than the variables that can be more or...

Housing Prices and Robustly Optimal Monetary Policy

Michael Woodford & Klaus Adam
We analytically characterize robustly optimal monetary policy for an augmented New Keynesian model with a housing sector. In our setting, the housing stock delivers a service flow entering households’ utility, houses are durable goods that depreciate over time, and new houses can be produced using a concave production technology. We show that shocks to housing demand and to housing productivity have “cost-push” implications, which warrant temporary fluctuations in the inflation rate under optimal policy, even...

Simple Analytics of the Government Expenditure Multiplier

Michael Woodford
This paper explains the key factors that determine the output multiplier of government purchases in New Keynesian models, through a series of simple examples that can be solved analytically. Sticky prices or wages allow for larger multipliers than in a neoclassical model, though the size of the multiplier depends crucially on the monetary policy response. A multiplier well in excess of one is possible when monetary policy is constrained by the zero lower bound, and...

James Brown Jr.: Art work

Artist's statement: "I studied oil painting in high school. During my senior year I dropped out of school and spent the last semester in night school to receive my diploma. That same year I enrolled in the Art Students League for one year, then transferred to the School of Visual Arts all evening classes for the next 7-8 years. In about 1968 I attended the School of Visual Arts full time for the first time....

Policy Options in a Liquidity Trap

Gauti B. Eggertsson & Michael Woodford
Taken from page 76 -- "The specter of a “liquidity trap,” originally proposed as a theoretical possibility by John Maynard Keynes (1936) but long considered to be of doubtful practical relevance, has recently created alarm among the world’s central banks. In Japan, the overnight rate has been essentially at zero for most of the time since February 1999, making further interest-rate cuts impossible. Yet until well into 2003, growth remained anemic while prices continued to...

Damascus at Night: A Ballet for Orchestra (PART 3: \"Business in Sabba Bahrat Square\" -- HORN)

Anthony J. Elia
Damascus at Night: A Ballet for Orchestra by Anthony J. Elia, Composed September 3-28, 2013; 573 pages, Performance Time: 1:17:14 (without breaks)/1:30:00 (with breaks) =============================================== “Damascus at Night” is a 21-movement ballet for orchestra about the elements of human suffering, uncertainty, and the search for hope in the Syrian Civil War (2013). The ballet addresses the human side of the conflict, portraying moments as far reaching as life around a kitchen table, a puppet theater,...

Damascus at Night: A Ballet for Orchestra (PART 3: \"Business in Sabba Bahrat Square\" -- TROMBONE)

Anthony J. Elia
Damascus at Night: A Ballet for Orchestra by Anthony J. Elia, Composed September 3-28, 2013; 573 pages, Performance Time: 1:17:14 (without breaks)/1:30:00 (with breaks) =============================================== “Damascus at Night” is a 21-movement ballet for orchestra about the elements of human suffering, uncertainty, and the search for hope in the Syrian Civil War (2013). The ballet addresses the human side of the conflict, portraying moments as far reaching as life around a kitchen table, a puppet theater,...

Three Questions about Sunspot Equilibria as an Explanation of Economic Fluctuations

Michael Woodford
It is by now well known that the sort of difference equations that characterize the equilibrium conditions of an infinite horizon competitive economy may have solutions in which the endogenous variables fluctuate in response to "sunspot" variables, that is, to random events that in fact have nothing to do with economic "fundamentals," and so do not directly affect the equilibrium conditions. It is possible to view such "sunspot equilibria" as a representation of an actual...

Damascus at Night: A Ballet for Orchestra (PART 4: \"The Quiet Puppet Theater of Ghouta\" -- PIANO)

Anthony J. Elia
Damascus at Night: A Ballet for Orchestra by Anthony J. Elia, Composed September 3-28, 2013; 573 pages, Performance Time: 1:17:14 (without breaks)/1:30:00 (with breaks) =============================================== “Damascus at Night” is a 21-movement ballet for orchestra about the elements of human suffering, uncertainty, and the search for hope in the Syrian Civil War (2013). The ballet addresses the human side of the conflict, portraying moments as far reaching as life around a kitchen table, a puppet theater,...

Damascus at Night: A Ballet for Orchestra (PART 4: \"The Quiet Puppet Theater of Ghouta\" -- VIOLA)

Anthony J. Elia
Damascus at Night: A Ballet for Orchestra by Anthony J. Elia, Composed September 3-28, 2013; 573 pages, Performance Time: 1:17:14 (without breaks)/1:30:00 (with breaks) =============================================== “Damascus at Night” is a 21-movement ballet for orchestra about the elements of human suffering, uncertainty, and the search for hope in the Syrian Civil War (2013). The ballet addresses the human side of the conflict, portraying moments as far reaching as life around a kitchen table, a puppet theater,...

Sonia Gechtoff: Art work

Sonia Gechtoff
My father was a painter originally from Odessa, Ukraine who traveled the world with my mother before I was born in Philadelphia, Pennsylvania in 1926. He encouraged me to be a painter and had me sit beside him at his easel with a brush and paints and beginning at age six he was there to spur me on. When I came to San Francisco, California in 1951 I found the major turning point for my...

A Combined Field And Laboratory Investigation Into The Transport Of Fecal Indicator Microorganisms Through A Shallow Drinking Water Aquifer In Bangladesh

John E. Feighery
This dissertation presents an examination of the causes and mechanisms underlying the widespread contamination of a shallow groundwater aquifer by fecal bacteria. The context for this study is a field site located in a rural area of Bangladesh that represents a microcosm for the many challenges facing the approximately 2 billion people worldwide who rely upon groundwater for their daily needs. The unique contributions of this work include an improved numerical model for fitting column...

Filamentation of Unstable Vortex Structures via Separatrix Crossing: A Quantitative Estimate of Onset Time

Lorenzo M. Polvani, G. R. Flierl & N. J. Zabusky
The onset of filamentation for compact vortex structures in two-dimensional incompressible flows is elucidated. An estimate is presented for the filamentation time of an unstably perturbed Kirchhoff ellipse, obtained from a linear analysis of the geometry of the instantaneous corotating streamfunction.

The Effect of Dissipation on Spatially Growing Nonlinear Baroclinic Waves

Lorenzo M. Polvani & J. Pedlosky
The question of convective (i.e., spatial) instability of baroclinic waves on an f-plane is studied in the context of the two-layer model. The viscous and inviscid marginal curves for linear convective instability are obtained. The finite-amplitude problem shows that when dissipation is O(1) it acts to stabilize the waves that are of Eady type. For very small dissipation the weakly nonlinear analysis reveals that at low frequencies, contrary to what is known to occur in...

Delayed Southern Hemisphere Climate Change Induced by Stratospheric Ozone Recovery, as Projected by the CMIP5 Models

Elizabeth A. Barnes, Nicholas W. Barnes & Lorenzo M. Polvani
Stratospheric ozone is expected to recover by the end of this century due to the regulation of ozone depleting substances by the Montreal Protocol. Targeted modeling studies have suggested that the climate response to ozone recovery will greatly oppose the climate response to rising greenhouse-gas (GHG) emissions. However, the extent of this cancellation remains unclear since only a few such studies are available. Here, we analyze a much larger set of simulations performed for the...

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