이젠 주제어를 Time Varying으로 축소하고, 자료를 찾는다.
http://public.econ.duke.edu/~brossi/NBERNSF/Koopmans.pdf
http://personal.vu.nl/s.j.koopman/documents/2011TSEweek1.pdf
http://www.mathworks.com.au/help/control/ug/kalman-filtering.html#zmw57dd0e24445
http://www.pftac.org/filemanager/files/Macro_Training/CCBS_2009/3_kalmanfilter.pdf
http://www.nrb.org.np/ecorev/pdffiles/vol25-2_art4.pdf
http://www.ssfpack.com/files/SsfPack-Illustrations.pdf
http://faculty.washington.edu/ezivot/econ584/notes/statespace.pdf
http://home.hit.no/~hansha/documents/control/theory/stateestimation_with_kalmanfilter.pdf
http://faculty.washington.edu/ezivot/book/structuralchangeslides3.pdf
http://web.econ.keio.ac.jp/staff/ito/pdf07/KESDP_07-8.pdf
다시 한번 매트랩
http://www.mathworks.com.au/help/econ/estimate-a-time-varying-state-space-model.html
다시 한번 S_Plus
http://faculty.washington.edu/ezivot/econ584/notes/statespace.pdf
ssfPack
http://www.ssfpack.com/files/SsfPack-Illustrations.pdf
Eviews
http://www.jstatsoft.org/v41/i08/paper
http://www.pftac.org/filemanager/files/Macro_Training/CCBS_2009/3_kalmanfilter.pdf
https://ideas.repec.org/a/jss/jstsof/41i08.html
http://econ.ccu.edu.tw/academic/master_paper/060503seminar(ssf).pdf
http://faculty.washington.edu/ezivot/econ584/584lab2_2006_Solutions.pdf
http://schwert.ssb.rochester.edu/a425/EV72.pdf
http://karibzhanov.com/
https://www2.le.ac.uk/departments/economics/people/shall/online-papers/testing-for-evolving-stock-mark-efficiency