Description:Before using the package, make sure you read the pdf file (About the MS_Regress_Package.pdf) in the downloaded zip file (or link below). A copy of this paper can also be found in http://ssrn.com/abstract=1714016. Features of the package: - Support for univariate and multivariate models;
- Support of any number of states and any number of explanatory variables;
- Estimation, by maximum likelihood, of any type of switching setup for the model. This means that you can choose which coefficients in the model, including distribution parameters, are switching states over time;
- A wrapper function for the estimation of regime switching autoregressive models, including multivariate case (MS-VAR) is included in the package;
- The values of parameter's standard errors can be calculated with 2 different methods;
- Includes a C version of hamilton’s filter that may be used for speeding up the estimation function (see pdf for details);
- Possibility of three distinct distribution assumptions for residual vector (Normal, t or GED);
- The user can choose the optimizing function to be used in the estimation of the model (fminsearch, fmincon or fminunc);
- Support for reduced/constrained estimation (see pdf document for details);
- Several example scripts that show how to use the code;
- The EM algorithm is not implemented (all models are estimated by direct maximization of log likelihood function);
- It does not support state space models with markov switching effects;
- It cannot estimate a model with time varying transition probabilities (TVPT). But, Zhuanxin Ding has developed a matlab package for TVTP models based on MS_Regress. You can access it here;
- It does not support models with garch type of filters for conditional volatility;
I also wrote a R/S+ version of the package (fMarkovSwitching). It is public available in the R Metrics project and in R Code section of this website. Please be aware that the R version in no longer being maintained so it is actually an older version of the matlab package with only the basic features.
Required Products:Optimization, Statistics References:Alexander, C. (2008) ‘Market Risk Analysis: Practical Financial Econometrics’ Wiley. Brooks, C. (2002) ‘Introduction to Econometrics’ Cambridge University Press. Hamilton, J., D. (2005) Regime Switching Models. Palgrave Dictionary of Economics, (available at http://dss.ucsd.edu/~jhamilto/palgrav1.pdf ) Hamilton , J., D. (1994) ‘Time Series Analysis’ Princeton University Press. Kim, C., J., Nelson, C., R. (1999) State Space Model with Regime Switching: Classical and Gibbs-Sampling Approaches with Applications. The MIT press. |

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