An Alternative Business Cycle Dating Procedure for South Africa
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- Adél Bosch & Franz Ruch, 2013. "An Alternative Business Cycle Dating Procedure for South Africa," South African Journal of Economics, Economic Society of South Africa, vol. 81(4), pages 491-516, December.
- Adél Bosch & Franz Ruch, 2012. "An alternative business cycle dating procedure for South Africa," Working Papers 267, Economic Research Southern Africa.
References listed on IDEAS
- Phillips, Kerk L., 1991. "A two-country model of stochastic output with changes in regime," Journal of International Economics, Elsevier, vol. 31(1-2), pages 121-142, August.
- Canova, Fabio, 1999.
"Does Detrending Matter for the Determination of the Reference Cycle and the Selection of Turning Points?,"
Economic Journal, Royal Economic Society, vol. 109(452), pages 126-150, January.
- Fabio Canova, 1994. "Does detrending matter for the determination of the reference cycle and the selection of turning points?," Economics Working Papers 113, Department of Economics and Business, Universitat Pompeu Fabra, revised Mar 1995.
- du Plessis, S.A., 2006.
"Reconsidering the business cycle and stabilisation policies in South Africa,"
Economic Modelling, Elsevier, vol. 23(5), pages 761-774, September.
- Stan Du Plessis, 2006. "Reconsidering the business cycle and stabilisation policies in South Africa," Working Papers 010, Economic Research Southern Africa.
- Mike Artis & Hans-Martin Krolzig & Juan Toro, 2004.
"The European business cycle,"
Oxford Economic Papers, Oxford University Press, vol. 56(1), pages 1-44, January.
- Artis, M. & Krolzig, H.-M. & Toro, J., 1999. "The European Business Cycle," Economics Working Papers eco99/24, European University Institute.
- Mike Artis & Hans-Martin Krolzig & Juan Toro, 2002. "The European Business Cycle," Economic Working Papers at Centro de Estudios Andaluces E2002/19, Centro de Estudios Andaluces.
- Artis, Michael J & Krolzig, Hans-Martin & Toro, Juan, 1999. "The European Business Cycle," CEPR Discussion Papers 2242, C.E.P.R. Discussion Papers.
- Jushan Bai & Serena Ng, 2002.
"Determining the Number of Factors in Approximate Factor Models,"
Econometrica, Econometric Society, vol. 70(1), pages 191-221, January.
- Jushan Bai & Serena Ng, 2000. "Determining the Number of Factors in Approximate Factor Models," Econometric Society World Congress 2000 Contributed Papers 1504, Econometric Society.
- Jushan Bai & Serena Ng, 2000. "Determining the Number of Factors in Approximate Factor Models," Boston College Working Papers in Economics 440, Boston College Department of Economics.
- Harding, Don & Pagan, Adrian, 2002.
"Dissecting the cycle: a methodological investigation,"
Journal of Monetary Economics, Elsevier, vol. 49(2), pages 365-381, March.
- Don Harding & Adrian Pagan, 2000. "Disecting the Cycle: A Methodological Investigation," Econometric Society World Congress 2000 Contributed Papers 1164, Econometric Society.
- Artis, Michael J & Kontolemis, Zenon G & Osborn, Denise R, 1997. "Business Cycles for G7 and European Countries," The Journal of Business, University of Chicago Press, vol. 70(2), pages 249-279, April.
- Kiefer, Nicholas M, 1978. "Discrete Parameter Variation: Efficient Estimation of a Switching Regression Model," Econometrica, Econometric Society, vol. 46(2), pages 427-434, March.
- Altug, Sumru & Bildirici, Melike, 2010.
"Business Cycles around the Globe: A Regime-switching Approach,"
CEPR Discussion Papers
7968, C.E.P.R. Discussion Papers.
- Sumru Altuğ & Melike Bildirici, 2010. "Business Cycles around the Globe: A Regime Switching Approach," Working Papers 0032, Yildiz Technical University, Department of Economics, revised Mar 2010.
- Sumru Altug & Melike Bildirici, 2010. "Business Cycles around the Globe: A Regime Switching Approach," Koç University-TUSIAD Economic Research Forum Working Papers 1009, Koc University-TUSIAD Economic Research Forum.
- Stan Du Plessis & Ben Smit & Federico Sturzenegger, 2007.
"The Cyclicality Of Monetary And Fiscal Policy In South Africa Since 1994,"
South African Journal of Economics, Economic Society of South Africa, vol. 75(3), pages 391-411, September.
- Stan du Plessis & Ben Smit & Federico Sturzenegger, 2007. "The cyclicality of monetary and fiscal policy in South Africa since 1994," Working Papers 12/2007, Stellenbosch University, Department of Economics.
- Stan du Plessis & Ben Smit & Federico Sturzenegger, 2008. "The Cyclicality of Monetary and Fiscal Policy in South Africa since 1994," Growth Lab Working Papers 14e, Harvard's Growth Lab.
- Stan du Plessis & Ben Smit & Federico Sturzenegger, 2008. "The Cyclicality of Monetary and Fiscal Policy in South Africa since 1994," CID Working Papers 163, Center for International Development at Harvard University.
- Markku Lanne & Helmut Lütkepohl, 2008.
"Stock Prices and Economic Fluctuations: A Markov Switching Structural Vector Autoregressive Analysis,"
CESifo Working Paper Series
2407, CESifo.
- Markku Lanne & Helmut Luetkepohl, 2008. "Stock Prices and Economic Fluctuations: A Markov Switching Structural Vector Autoregressive Analysis," Economics Working Papers ECO2008/29, European University Institute.
- Forni, Mario, et al, 2001.
"Coincident and Leading Indicators for the Euro Area,"
Economic Journal, Royal Economic Society, vol. 111(471), pages 62-85, May.
- Lucrezia Reichlin & Mario Forni & Marc Hallin & Marco Lippi, 2001. "Coincident and leading indicators for the Euro area," ULB Institutional Repository 2013/10137, ULB -- Universite Libre de Bruxelles.
- Kontolemis, Zenon G, 2001. "Analysis of the US Business Cycle with a Vector-Markov-Switching Model," Journal of Forecasting, John Wiley & Sons, Ltd., vol. 20(1), pages 47-61, January.
- Harding, Don & Pagan, Adrian, 2003. "A comparison of two business cycle dating methods," Journal of Economic Dynamics and Control, Elsevier, vol. 27(9), pages 1681-1690, July.
- Allan Layton & Anirvan Banerji, 2003. "What is a recession?: A reprise," Applied Economics, Taylor & Francis Journals, vol. 35(16), pages 1789-1797.
- Hamilton, James D., 1988. "Rational-expectations econometric analysis of changes in regime : An investigation of the term structure of interest rates," Journal of Economic Dynamics and Control, Elsevier, vol. 12(2-3), pages 385-423.
- Olivier Jean Blanchard & Stanley Fischer, 1989. "Lectures on Macroeconomics," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262022834, April.
- Chang-Jin Kim & Charles R. Nelson, 1999. "Has The U.S. Economy Become More Stable? A Bayesian Approach Based On A Markov-Switching Model Of The Business Cycle," The Review of Economics and Statistics, MIT Press, vol. 81(4), pages 608-616, November.
- Harvey, David I. & Leybourne, Stephen J. & Taylor, A.M. Robert, 2009.
"Unit Root Testing In Practice: Dealing With Uncertainty Over The Trend And Initial Condition,"
Econometric Theory, Cambridge University Press, vol. 25(3), pages 587-636, June.
- David I. Harvey & Stephen J. Leybourne & A. M. Robert Taylor, 2007. "Unit root testing in practice: dealing with uncertainty over the trend and initial condition," Discussion Papers 07/03, University of Nottingham, Granger Centre for Time Series Econometrics.
- Arthur F. Burns & Wesley C. Mitchell, 1946. "Measuring Business Cycles," NBER Books, National Bureau of Economic Research, Inc, number burn46-1.
- Moolman, Elna, 2004. "A Markov switching regime model of the South African business cycle," Economic Modelling, Elsevier, vol. 21(4), pages 631-646, July.
- I Botha & L Greyling & D J Marais, 2006. "Modelling the Business Cycle in South Africa: A Non-Linear Approach," Studies in Economics and Econometrics, Taylor & Francis Journals, vol. 30(2), pages 103-126, August.
- Gerhard Bry & Charlotte Boschan, 1971. "Cyclical Analysis of Time Series: Selected Procedures and Computer Programs," NBER Books, National Bureau of Economic Research, Inc, number bry_71-1.
- Wh Boshoff, 2005.
"The Properties Of Cycles In South African Financial Variables And Their Relation To The Business Cycle,"
South African Journal of Economics, Economic Society of South Africa, vol. 73(4), pages 694-709, December.
- Willem Boshoff, 2005. "The properties of cycles in South African financial variables and their relation to the business cycle," Working Papers 02/2005, Stellenbosch University, Department of Economics.
- James H. Stock & Mark W. Watson, 1989.
"New Indexes of Coincident and Leading Economic Indicators,"
NBER Chapters, in: NBER Macroeconomics Annual 1989, Volume 4, pages 351-409,
National Bureau of Economic Research, Inc.
- Stock, J.H. & Watson, M.W., 1989. "New Indexes Of Coincident And Leading Economic Indicators," Papers 178d, Harvard - J.F. Kennedy School of Government.
- Goodwin, Thomas H, 1993. "Business-Cycle Analysis with a Markov-Switching Model," Journal of Business & Economic Statistics, American Statistical Association, vol. 11(3), pages 331-339, July.
- Engel, Charles & Hamilton, James D, 1990. "Long Swings in the Dollar: Are They in the Data and Do Markets Know It?," American Economic Review, American Economic Association, vol. 80(4), pages 689-713, September.
- du Plessis, S. A., 2004. "Stretching the South African business cycle," Economic Modelling, Elsevier, vol. 21(4), pages 685-701, July.
- Gerhard Bry & Charlotte Boschan, 1971. "Foreword to "Cyclical Analysis of Time Series: Selected Procedures and Computer Programs"," NBER Chapters, in: Cyclical Analysis of Time Series: Selected Procedures and Computer Programs, pages -1, National Bureau of Economic Research, Inc.
- Hugo Nel*, 1996. "The Term Structure of Interest Rates and Economic Activity in South Africa," South African Journal of Economics, Economic Society of South Africa, vol. 64(3), pages 151-157, September.
- Ang, Andrew & Bekaert, Geert, 2002.
"Regime Switches in Interest Rates,"
Journal of Business & Economic Statistics, American Statistical Association, vol. 20(2), pages 163-182, April.
- Andrew Ang & Geert Bekaert, 1998. "Regime Switches in Interest Rates," NBER Working Papers 6508, National Bureau of Economic Research, Inc.
- Benoit Bellone, 2005. "Classical Estimation of Multivariate Markov-Switching Models using MSVARlib," Econometrics 0508017, University Library of Munich, Germany.
- Hamilton, James D, 1989. "A New Approach to the Economic Analysis of Nonstationary Time Series and the Business Cycle," Econometrica, Econometric Society, vol. 57(2), pages 357-384, March.
- Alessi, Lucia & Barigozzi, Matteo & Capasso, Marco, 2010. "Improved penalization for determining the number of factors in approximate factor models," Statistics & Probability Letters, Elsevier, vol. 80(23-24), pages 1806-1813, December.
- Hallin, Marc & Liska, Roman, 2007. "Determining the Number of Factors in the General Dynamic Factor Model," Journal of the American Statistical Association, American Statistical Association, vol. 102, pages 603-617, June.
Citations
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Cited by:
- Binge, Laurie H. & Boshoff, Willem H., 2020. "Economic uncertainty in South Africa," Economic Modelling, Elsevier, vol. 88(C), pages 113-131.
- Ferdi Botha & Gavin Keeton, 2014.
"A Note on the (Continued) Ability of the Yield Curve to Forecast Economic Downturns in South Africa,"
South African Journal of Economics, Economic Society of South Africa, vol. 82(3), pages 468-473, September.
- Ferdi Botha & Gavin Keeton, 2014. "A Note on the (continued) Ability of the Yield Curve to Forecast Economic Downturns in South Africa," Working Papers 449, Economic Research Southern Africa.
- Balcilar, Mehmet & Gupta, Rangan & Jooste, Charl & Ranjbar, Omid, 2016. "Characterising the South African business cycle: is GDP difference-stationary or trend-stationary in a Markov-switching setup? - Il ciclo economico del Sud Africa: il PIL è stazion ario alle differenz," Economia Internazionale / International Economics, Camera di Commercio Industria Artigianato Agricoltura di Genova, vol. 69(1), pages 33-44.
- Martin Wichlinski & Rajendra Rajaram, 2019. "The Use of RONA/WACC as a Proxy for Investment Quality," Journal of Economics and Behavioral Studies, AMH International, vol. 10(6), pages 177-185.
- Greg Farrell & Esti Kemp, 2020. "Measuring the Financial Cycle in South Africa," South African Journal of Economics, Economic Society of South Africa, vol. 88(2), pages 123-144, June.
- Malibongwe Cyprian Nyati & Paul-Francois Muzindutsi & Christian Kakese Tipoy, 2023. "Macroprudential and Monetary Policy Interactions and Coordination in South Africa: Evidence from Business and Financial Cycle Synchronisation," Economies, MDPI, vol. 11(11), pages 1-23, November.
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JEL classification:
- C10 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - General
- E32 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Business Fluctuations; Cycles
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