搜索结果: 31-45 共查到“理论经济学 time”相关记录120条 . 查询时间(1.125 秒)
Forecasting Value-at-Risk with Time-Varying Variance, Skewness and Kurtosis in an Exponential Weighted Moving Average Framework
exponential weighted moving average time -varying higher moments Cornish-Fisher expansion Gram -Charlier density risk management Value-at -Risk
2012/9/14
This paper provides an insight to the time-varying dynamics of the shape of the distribution of financial return series by proposing an exponential weighted moving average model that joint...
Stochastic Volatility with Heterogeneous Time Scales
Stochastic Volatility Long Memory Generalized Methods of Moments Econo-physics
2012/9/13
Agents' heterogeneity has been recognized as a driver mechanism for the persistence of nancial volatility. We focus on the multiplicity of investment strategies' horizons;we embed this concept in a c...
No-Arbitrage Pricing for Dividend-Paying Securities in Discrete-Time Markets with Transaction Costs
arbitrage fundamental theorem of asset pricing transaction costs consistent pricing system liquidity dividends credit default swaps
2012/6/5
We prove a version of First Fundamental Theorem of Asset Pricing under transaction costs for discrete-time markets with dividend-paying securities. Specifically, we show that the no-arbitrage conditio...
Time-Consistent Mean-Variance Portfolio Selection in Discrete and Continuous Time
mean-variance criterion Markowitz problem portfolio optimisation time consistency time-inconsistent optimal control
2012/6/5
It is well known that mean-variance portfolio selection is a time-inconsistent optimal control problem in the sense that it does not satisfy Bellman's optimality principle and therefore the usual dyna...
Hierarchical structure and time-lag correlation in Worldwide Financial Markets
Hierarchical structure time-lag correlation Worldwide Financial Markets Statistical Finance
2012/6/4
Recently, many studies indicated that the minimum spanning tree (MST) network whose metric distance is de?ned by using correlation coe?cients have strong implications on extracting infor- mation from ...
On the non-stationarity of financial time series: impact on optimal portfolio selection
non-stationarity of financial time series impact optimal portfolio selection Statistical Finance
2012/6/2
We investigate the possible drawbacks of employing the standard Pearson estimator to measure correlation coefficients between financial stocks in the presence of non-stationary behavior, and we provid...
Segmentation analysis on a multivariate time series of the foreign exchange rates
finite multivariate Gaussian mixture Jensen-Shannon divergence variance-covariance matrix cross-sectional analysis
2012/6/2
This study considers the multivariate segmentation procedure under the assumption of the multivariate Gaussian mixture. Jensen-Shannon divergence between two multivariate Gaussian distributions is emp...
Study of statistical correlations in intraday and daily financial return time series
Study of statistical correlations intraday daily financial return time series Statistical Finance
2012/4/28
The aim of this article is to briefly review and make new studies of correlations and co-movements of stocks, so as to understand the "seasonalities" and market evolution. Using the intraday data of t...
Identifying financial crises in real time
Time series analysis fluctuation phenomena interdisciplinary physics econophysics financial markets fractals
2012/4/28
In this work we develop a new measure to study the behavior of stochastic time series, which permits to distinguish events which are different from the ordinary, like financial crises. We identify fro...
Cone-Constrained Continuous-Time Markowitz Problems
Markowitz problem cone constraints portfolio selection mean-variancehedging stochastic control semimartingales BSDEs martingale optimality principle opportunity process E-martingales linear-quadratic control
2012/9/14
The Markowitz problem consists of finding in a financial market a self-financing trading strategy whose final wealth has maximal mean and minimal variance. We
study this in continuous time in a gener...
Comparing the reliability of a discrete-time and a continuous-time Markov chain model in
discrete-time transition matrix the default probability the empirical results
2011/8/30
This article compares the reliability of a discrete-time and a continuous-time Markov chain model for estimating credit risk and for investigating loans of Chiao Tung Bank in Taiwan. The continuous-ti...
CREDIT RISK MODELING USING TIME-CHANGED BROWNIAN MOTION
credit derivative Credit risk default probability first passage time
2011/8/22
Motivated by the interplay between structural and reduced form credit models, we propose to model the firm value process as a time-changed Brownian motion that may include jumps and stochastic volatil...
A two-stage dynamic credit scoring model, based on customers’ profile and time horizon
credit scoring model logistic regression survival analysis
2011/8/22
As credit card usage has expanded rapidly worldwide, credit scoring has become a very important task for banks, which can benefit from reducing possible risks of default. Credit scoring models help de...
Has U.S. Monetary Policy Changed? Evidence from Drifting Coefficients and Real-Time Data
forward-looking Taylor rule Greenbook Parameter instability time-varying parameter model
2011/8/21
Despite the large amount of empirical research on monetary policy rules, there is surprisingly little consensus on the nature or even the existence of changes in the conduct of U.S. monetary policy. T...
Measuring the Time Inconsistency of US Monetary Policy
alternative explanation inflation monetary policy asymmetric preferences implicit target
2011/8/21
This paper offers an alternative explanation for the great inflation of the 1970s by measuring a novel source of monetary policy time inconsistency. In the presence of asymmetric preferences, the mone...