Results 1 - 10
of
16,346
Crowds: Anonymity for Web Transactions
- ACM Transactions on Information and System Security
, 1997
"... this paper we introduce a system called Crowds for protecting users' anonymity on the worldwide -web. Crowds, named for the notion of "blending into a crowd", operates by grouping users into a large and geographically diverse group (crowd) that collectively issues requests on behalf o ..."
Abstract
-
Cited by 838 (13 self)
- Add to MetaCart
of its members. Web servers are unable to learn the true source of a request because it is equally likely to have originated from any member of the crowd, and even collaborating crowd members cannot distinguish the originator of a request from a member who is merely forwarding the request on behalf
Fast texture synthesis using tree-structured vector quantization
, 2000
"... Figure 1: Our texture generation process takes an example texture patch (left) and a random noise (middle) as input, and modifies this random noise to make it look like the given example texture. The synthesized texture (right) can be of arbitrary size, and is perceived as very similar to the given ..."
Abstract
-
Cited by 561 (12 self)
- Add to MetaCart
example. Using our algorithm, textures can be generated within seconds, and the synthesized results are always tileable. Texture synthesis is important for many applications in computer graphics, vision, and image processing. However, it remains difficult to design an algorithm that is both efficient
Reviews are not equally important: Predicting the helpfulness of online reviews
, 2008
"... Online reviews provide a valuable resource for potential customers to make purchase decisions. However, the sheer volume of available reviews as well as the large variations in the review quality present a big impediment to the effective use of the reviews, as the most helpful reviews may be buried ..."
Abstract
-
Cited by 1 (0 self)
- Add to MetaCart
in the large amount of reviews of low qualities. The goal of this paper is to develop models and algorithms for predicting the helpfulness of reviews, which provides the basis for discovering the most helpful reviews for given products. We first show that the helpfulness of a review depends on three important
Buffer stock saving and the life-cycle/permanent income hypothesis
- Quarterly Journal of Economics
, 1997
"... This paper argues that the typical household’s saving is better described by a “bufferstock” version than by the traditional version of the Life Cycle/Permanent Income Hypothesis (LC/PIH) model. Buffer-stock behavior emerges if consumers with important income uncertainty are sufficiently impatient. ..."
Abstract
-
Cited by 467 (19 self)
- Add to MetaCart
This paper argues that the typical household’s saving is better described by a “bufferstock” version than by the traditional version of the Life Cycle/Permanent Income Hypothesis (LC/PIH) model. Buffer-stock behavior emerges if consumers with important income uncertainty are sufficiently impatient
Fading Channels: Information-Theoretic And Communications Aspects
- IEEE TRANSACTIONS ON INFORMATION THEORY
, 1998
"... In this paper we review the most peculiar and interesting information-theoretic and communications features of fading channels. We first describe the statistical models of fading channels which are frequently used in the analysis and design of communication systems. Next, we focus on the information ..."
Abstract
-
Cited by 426 (3 self)
- Add to MetaCart
on the information theory of fading channels, by emphasizing capacity as the most important performance measure. Both single-user and multiuser transmission are examined. Further, we describe how the structure of fading channels impacts code design, and finally overview equalization of fading multipath channels.
Performance Anomaly of 802.11b
- In IEEE INFOCOM
, 2003
"... Abstract — We analyze the performance of the IEEE 802.11b wireless local area networks. We have observed that when some mobile hosts use a lower bit rate than the others, the performance of all hosts is considerably degraded. Such a situation is a common case in wireless local area networks in which ..."
Abstract
-
Cited by 431 (11 self)
- Add to MetaCart
in which a host far away from an Access Point is subject to important signal fading and interference. To cope with this problem, the host changes its modulation type, which degrades its bit rate to some lower value. Typically, 802.11b products degrade the bit rate from 11 Mb/s to 5.5, 2, or 1 Mb/s when
Is Demand-pulled Innovation Equally Important in Different Groups of Firms?, Cambridge
- Journal of Economics
, 2007
"... positions. ..."
The Determinants of Credit Spread Changes.
- Journal of Finance
, 2001
"... ABSTRACT Using dealer's quotes and transactions prices on straight industrial bonds, we investigate the determinants of credit spread changes. Variables that should in theory determine credit spread changes have rather limited explanatory power. Further, the residuals from this regression are ..."
Abstract
-
Cited by 422 (2 self)
- Add to MetaCart
are highly cross-correlated, and principal components analysis implies that they are mostly driven by a single common factor. An important implication of this finding is that if any explanatory variables have been omitted, they are likely not firm-specific. We therefore re-run the regression, but 1 this time
of LaborIs Demand-Pulled Innovation Equally Important in Different Groups of Firms?
, 2006
"... Any opinions expressed here are those of the author(s) and not those of the institute. Research disseminated by IZA may include views on policy, but the institute itself takes no institutional policy positions. The Institute for the Study of Labor (IZA) in Bonn is a local and virtual international r ..."
Abstract
- Add to MetaCart
Any opinions expressed here are those of the author(s) and not those of the institute. Research disseminated by IZA may include views on policy, but the institute itself takes no institutional policy positions. The Institute for the Study of Labor (IZA) in Bonn is a local and virtual international research center and a place of communication between science, politics and business. IZA is an independent nonprofit company supported by Deutsche Post World Net. The center is associated with the University of Bonn and offers a stimulating research environment through its research networks, research support, and visitors and doctoral programs. IZA engages in (i) original and internationally competitive research in all fields of labor economics, (ii) development of policy concepts, and (iii) dissemination of research results and concepts to the interested public. IZA Discussion Papers often represent preliminary work and are circulated to encourage discussion. Citation of such a paper should account for its provisional character. A revised version may be available directly from the author. IZA Discussion Paper No. 1982
The effects of cognitive and non-cognitive abilities on labor market outcomes and social behavior
- Journal of Labor Economics
, 2006
"... William Johnson and James P. Ziliak and two anonymous referees for helpful comments. We also thank Jeff Grogger, Bruce Meyer and Derek Neal for very helpful comments that led to revisions and clarifications. Supplementary materials are on our website jenni.uchicago.edu/noncog. We thank Federico Teme ..."
Abstract
-
Cited by 370 (46 self)
- Add to MetaCart
Temerlin and Tae Ho Whang for very competent research assistance. This paper establishes that a low dimensional vector of cognitive and noncognitive skills explains a variety of labor market and behavioral outcomes. For many dimensions of social performance cognitive and noncognitive skills are equally
Results 1 - 10
of
16,346