João P. Hespanha, Stephan Bohacek, Junsoo Lee, Katia Obraczka, Abhyudai Singh, Yonggang Xu, ...
continuous dynamics continuous dynamics Deterministic Hybrid Systems q(t) ∈ Q={1,2,…} ≡ discrete state x(t) ∈ R n ≡ continuous state reset-maps right-continuous by convention guard...
A Study of TCP Fairness in High-Speed Networks (2008)
Junsoo Lee, João P. Hespanha, Stephan Bohacek
Abstract — Under the TCP congestion control regime, heterogeneous flows, i.e., flows with different round-trip times (RTTs), that share the same bottleneck link will not attain equal portions of...
Modeling Communication Networks With Hybrid Systems (2008)
Junsoo Lee, Stephan Bohacek, João P. Hespanha, Senior Member, Katia Obraczka
Abstract—This paper introduces a general hybrid systems framework to model the flow of traffic in communication networks. The proposed models use averaging to continuously approximate discrete...
Stephan Bohacek, João P. Hespanha, Comp Eng, Junsoo Lee
In this paper we present a general hybrid systems modeling framework to describe the flow of traffic in communication networks. To characterize network behavior, these models use averaging to...
A New TCP for Persistent Packet Reordering (2008)
Stephan Bohacek, João P. Hespanha, Senior Member, Junsoo Lee, Chansook Lim, Student Member, ...
Abstract—Most standard implementations of TCP perform poorly when packets are reordered. In this paper, we propose a new version of TCP that maintains high throughput when reordering occurs and...
A New TCP for Persistent Packet Reordering (2008)
Stephan Bohacek, João P. Hespanha, Junsoo Lee, Chansook Lim, Katia Obraczka
Abstract — Most standard implementations of TCP perform poorly when packets are reordered. In this paper, we propose a new version of TCP that maintains high throughput when reordering occurs and...
Modeling Communication Networks with Hybrid Systems (2008)
Junsoo Lee, Stephan Bohacek, João P. Hespanha, Senior Member, Katia Obraczka
Abstract — This paper introduces a general hybrid systems framework to model the flow of traffic in communication networks. The proposed models use averaging to continuously approximate discrete...
Modeling Communication Networks with Hybrid Systems: Extended Version (2008)
Junsoo Lee, Bohacek Stephan, João P. Hespanha, Katia Obraczka
Abstract — This paper introduces a general hybrid systems framework to model the flow of traffic in communication networks. The proposed models use averaging to continuously approximate discrete...
Stephan Bohacek, João P. Hespanha, Comp Eng, Junsoo Lee
In this paper we present a general hybrid systems modeling framework to describe the flow of traffic in communication networks. To characterize network behavior, these models use averaging to...
Woo, Koan Sik, Son, Sang Ik, Jeong, Heon-Sang, Lee, Junsoo, Lee, Hee-Bong
Treatment effects of grape fruit stem extracts (GFSE) containing trans-resveratrol on the storage property of fresh jujube (Zizyphus jujube) were investigated. Fresh jujubes were packed in different...
Comparison of Extraction Methods for the Determination of Vitamin E in Some Grains (2008)
Lee, Seon-Mi, Lee, Hee-Bong, Lee, Junsoo
For the determination of vitamin I using high performance liquid chromatography (HPLC), the most critical and time consuming step is the Quantitative extraction of all vitamin E homologs from sample...
Analysis of Vitamin E in Some Commonly Consumed Foods in Korea (2008)
Lee, Seon-Mi, Lee, Hee-Bong, Lee, Junsoo
Tocopherol and tocotrienol contents of commonly consumed foods in Korea were determined by saponification or direct solvent extraction followed by normal phase liquid chromatography. All samples were...
PANEL LM UNIT ROOT TEST WITH LEVEL SHIFTS Kyung So Im (2007)
This paper proposes a new panel LM unit root test in the presence of a structural break. We show that the asymptotic distribution of the proposed panel test with level shifts is the same as the test...
Minimum LM Unit Root Test with Two Structural Breaks (2007)
The two-break unit root test of Lumsdaine and Papell (1997) is examined and found to suffer from bias and spurious rejections in the presence of structural breaks under the null. A two-break minimum...
Stephan Bohacek, João Hespanha, Junsoo Lee, Chansook Lim, Katia Obraczka
Most of today’s Internet routing protocols forward packets of a connection over a single path. This means that, even if redundant resources are available, a single failure (accidental or due to...
Modeling data communication networks using hybrid systems: Extended version (2006)
Junsoo Lee, Bohacek Stephan, João P. Hespanha, Katia Obraczka
Abstract — This paper introduces a general hybrid systems framework to model the flow of traffic in communication networks. The proposed models use averaging to continuously approximate discrete...
Elston,Julie Ann, Hofler,Richard, Lee,Junsoo
This study investigates the relationship between institutional ownership and dividend payout behavior of the firm in Germany. Using a propensity scoring method estimator to control for endogeneity...
Elston, Julie Ann, Hofler, Richard, Lee, Junsoo
This study investigates the relationship between institutional ownership and dividend payout behavior of the firm in Germany. Using a propensity scoring method estimator to control for endogeneity...
A hybrid systems modeling framework for transport protocols / (2004)
Thesis (Ph. D.)--University of Southern California, 2004.
TCP-PR: TCP for persistent packet reordering (2003)
Stephan Bohacek, João P. Hespanha, Junsoo Lee, Chansook Lim, Katia Obraczka
Most standard implementations of TCP perform poorly when packets are reordered. In this paper, we propose a new version of TCP that maintains high throughput when reordering occurs and yet, when...
Enhancing security via stochastic routing (2002)
Stephan Bohacek, João P. Hespanha, Katia Obraczka, Junsoo Lee, Chansook Lim
Abstract—Shortest path routing leaves connections at risk of interception and eavesdropping since the path over which data packets travel is fairly predictable and easy to determine. To improve...
Stephan Bohacek, João P. Hespanha, Junsoo Lee, Chansook Lim, Katia Obraczka
Most standard implementations of TCP perform poorly when packets are reordered. In this paper, we propose a new version of TCP that maintains high throughput when reordering occurs and yet, when...
Analysis of a TCP hybrid model (2001)
Stephan Bohacek, João P. Hespanha, Junsoo Lee, Katia Obraczka
In this paper we use hybrid systems to model and analyze the transient and steady-state behavior of multiple TCP flows that share a single common bottleneck link. The main contributions of this paper...
Analysis of a TCP hybrid model (2001)
Stephan Bohacek, Joao P. Hespanha, Junsoo Lee, Katia Obraczka
In this paper we use hybrid systems to model and analyze the transient and steady-state behavior of multiple TCP flows that share a single common bottleneck link. The main contributions of this paper...
A Hybrid Systems Framework for TCP Congestion Control (2001)
Stephan Bohacek, João P. Hespanha, Junsoo Lee, Katia Obraczka
Abstract — In this paper we make use of hybrid systems to model the transient and steady-state behavior of multiple TCP flows that share a single common bottleneck link. The contributions of our...
Analysis of a TCP hybrid model (2001)
Stephan Bohacek, João P. Hespanha, Junsoo Lee, Katia Obraczka
In this paper we use hybrid systems to model and analyze the transient and steady-state behavior of multiple TCP flows that share a single common bottleneck link. The main contributions of this paper...
Thesis (Ph. D.)--Michigan State University. Dept. of Economics, 1991.
Thesis (Ph. D.)--Michigan State University. Dept. of Economics, 1991.
Historical Net Discount Rates and Future Economic Losses: Refuting the Common Practice
Bradley Braun, Junsoo Lee, Mark C. Strazicich
In wrongful death and personal injury litigation, the amount of compensation depends on the difference between the interest rate that the plaintiff is expected to earn by investing the award and the...
Mark C. Strazicich, Junsoo Lee
This paper empirically tests if U.S. regional per capita incomes are stochastically converging. We advance the issue by employing a LM panel unit root test that allows for region-specific structural...
Nonrenewable Resource Prices: Deterministic or Stochastic Trends?
Junsoo Lee, John A. List, Mark C. Strazicich
In this paper we examine temporal properties of eleven natural resource real price series from 1870-1990. Recent studies by Ahrens and Sharma [1997], Berck and Roberts [1996], and Slade [1988], among...
A Stationarity Test in the Presence of an Unknown Number of Smooth Breaks
Ralf Becker, Walter Enders, Junsoo Lee
Macroeconomic variables have been shown to display a wide variety of structural breaks of unknown number, duration and form. This poses a challenge since improperly modelled breaks can result in a...
Nonrenewable Resource Prices: Deterministic or Stochastic Trends?
Junsoo Lee, John A. List, Mark Strazicich
In this paper we examine temporal properties of eleven natural resource real price series from 1870-1990 by employing a Lagrangian Multiplier unit root test that allows for two endogenously...
Testing for a unit-root with a nonlinear Fourier function
The paper develops a unit-root test that allows for an unknown number of structural breaks with unknown functional forms. The test is based on the fact that the behavior of such series can often be...
Unit Root Tests Based on Instrumental Variables Estimation.
This paper develops new tests of the unit root hypothesis based on instrumental variables estimation. The tests are asymptotically valid in the presence of moving average errors and they are quite...
Panel LM Unit-root Tests with Level Shifts
Kyung-So Im, Junsoo Lee, Margie Tieslau
This paper proposes a new panel unit-root test based on the Lagrangian multiplier (LM) principle. We show that the asymptotic distribution of the new panel LM test is not affected by the presence of...
Break Point Estimation and Spurious Rejections with Endogenous Unit Root Tests.
Lee, Junsoo, Strazicich, Mark C
This paper examines the accuracy of break point estimation using the endogenous break unit root tests of Zivot and Andrews (1992) and Perron (1997). We find that these tests tend to identify the...
Modeling International Long-Term Interest Rates.
DeGennaro, Ramon P, Kunkel, Robert A, Lee, Junsoo
This study investigates the relationship among interest rates on the long-term government bonds of five industrialized countries. Both standard and new unit root tests are applied, all of which...
Average Derivative Estimation of Hedonic Price Models
Junsoo Lee, Seung-Jun Kwak, John List
Conventional parametric techniques for estimatinghedonic price models require a correct functionalform. In this paper, we side-step this parametricshortcoming by estimating a hedonic price model...
Despite its growth in other areas of economics,time series econometric methods have not beenwidespread in the area of environmental andresource economics. We illustrate one use oftime series methods...
Minimum LM Unit Root Test with One Structural Break
Junsoo Lee, Mark C. Strazicich
In this paper, we propose a minimum LM unit root test that endogenously determines a structural break in intercept and trend. Critical values are provided, and size and power properties are compared...
Experimenting with multi-attribute utility survey methods in a multi-dimensional valuation problem
Russell, Clifford, Dale, Virginia, Lee, Junsoo, Jensen, Molly Hadley, Kane, Michael, Gregory, Robin
LM Unit Root Test with Panel Data: A Test Robust To Structural Changes
This paper proposes an LM test for the unit root hypothesis using panel data. The LM statistic based on the pooled likelihood function is obtained by standardizing the average of the LM statistic for...
Quasi-fixed inputs and long-run equilibrium in production: a cointegration analysis
This paper proposes a cointegration approach to testing the validity long-run equilibrium in production, where capital and labour are taken as quasi-fixed inputs. Previous studies consider only...
Richard Hofler, Julie Ann Elston, Junsoo Lee
This study investigates the relationship between institutional ownership and dividend payout behavior of the firm in Germany. Using a propensity scoring method estimator to control for endogeneity...
Testing the Null of Stationarity in the Presence of a Structural Break.
A test for stationarity in the presence of a structural break is proposed. An unknown break point is endogenously determined at the value minimizing the test statistic. The break point can be...
Minimum Lagrange Multiplier Unit Root Test with Two Structural Breaks
Junsoo Lee, Mark C. Strazicich
The endogenous two-break unit root test of Lumsdaine and Papell is derived assuming no structural breaks under the null. Thus, rejection of the null does not necessarily imply rejection of a unit...
Putting Out Fires: An Examination of the Determinants of State Clean Indoor-Air Laws
Craig A. Gallet, Gary A. Hoover, Junsoo Lee
Although numerous studies have examined the effect of clean indoor-air laws on tobacco consumption, a handful of other studies have sought to address the demand for smoking restrictions. This paper...
THE DETERMINANTS OF LAWS RESTRICTING YOUTH ACCESS TO TOBACCO
CRAIG A. GALLET, GARY A. HOOVER, JUNSOO LEE
"Since many smokers begin consuming tobacco products in their adolescent years, many states have adopted a variety of restrictions on youth access to tobacco, which studies show reduces the demand...
Do Solicitations Matter in Bank Credit Ratings? Results from a Study of 72 Countries
Would the credit ratings of unsolicited banks be higher if they were solicited? Alternatively, would the credit ratings of solicited banks would be lower if they were unsolicited? To answer these...
ADL tests for threshold cointegration
In this paper, we propose new tests for threshold cointegration in the autoregressive distributed lag (ADL) model. The indicators in the threshold model are based on either a nonstationary or...