Balcilar, M., R. Gupta, C. Jooste & M.E. Wohar. (2016). Periodically Collapsing Bubbles in the South African Stock Market. University of Pretoria, Working paper, No. 201624. ##Bettendorf, T. & W. Chen. (2013). Are There Bubbles in the Sterling-Dollar Exchange Rate? New Evidence from Sequential ADF Test. Freie Universidad Berlin, Discussion Paper Economics. ##Blanchard, O. (1979). Speculative Bubbles, Crashes and Rational Expectations. Economic Letters, 3: 387-389. ##Blanchard, O.J. & M.W. Watson. (1982). Bubbles, Rational Expectations and Financial Markets. NBER Working Paper, No. 945. ##Bohl, M.T., P. Kaufmann & P.L. Siklos. (2015). What Drove The Mid-2000s Explosiveness in Alternative Energy Stock Prices? Evidence From U.S., European and Global Indices. International Review of Financial Analysis, 40: 194-206. ##Bohl, M.T., P. Kaufmann & P.M. Stephan. (2013). From Hero to Zero: Evidence of Performance Reversal and Speculative Bubbles in German Renewable Energy Stocks. Energy Economics, 37: 40-51. ##Campbell, J. & R. Shiller. (1987). Co-integration and Tests of Present Value Models. Journal of Political Economy, 95: 1062-1088. ##Caspi, I., N. Katzke & R. Gupta. (2015). Date Stamping Historical Periods of Oil Price Explosivity: 1876–2014. Energy Economics. ##Chang, T., G. Aye & R. Gupta. (2014). Testing for Multiple Bubbles in the BRICS Stock Markets. University of Pretoria, Working Paper. ##Charemza, W.W. & D.F. Deadman. (1995). Bubbles with Stochastic Explosive Roots: The Failure of Unit Root Testing. Journal of Empirical Finance, 2: 153-163. ##Chen A.S., L.Y. Cheng & K.F. Cheng. (2009). Intrinsic Bubbles and Granger Causality in the S&P500: Evidence from Long-Term Data. Journal of Banking and Finance, 33: 2275-2281. ##Chen, M.P., Y.H. Lin, Ch.Y. Tseng & W.Y. Chen. (2015). Bubbles in health care: Evidence from the U.S., U.K., and German Stock Markets. North American Journal of Economics and finance, 31: 193-205. ##Cheng, K. & C. Lu. (2009). Identifying the Stock Bubble Period from Long Term S&P 500 Index. International Conference on Business Management and Information Technology Application. ##Cunado, J., L.A. Gil-Alana & F. Perez de Gracia. (2005). A Test for Rational Bubbles in the NASDAQ Stock Index: A Fractionally Integrated Approach. Journal of Banking and Finance, 29: 2633-2654. ##Diba, B.T. & H.I. Grossman. (1988). Explosive Rational Bubbles in Stock Prices? The American Economic Review, 78(3): 520–530. ##El Montasser, G., R. Gupta, A.L. Martins & P. Wanke. (2015). Are There Multiple Bubbles in The Ethanol–Gasoline Price Ratio of Brazil? Renewable and Sustainable Energy Reviews, 52: 19-23. ##Englund, P. (1999). The Swedish Banking Crisis: Roots and Consequences. Oxford Review of Economic Policy, 15: 80-97. ##Engsted, T., S.J. Hviid & T.Q. Pederson. (2015). Explosive Bubbles in House Prices? Evidence from the OECD countries. Journal of International Financial Markets, Institutions & Money, 40: 14-25. ##Escobari, D. & M. Jafarinejad. (2015). Date stamping bubbles in Real Estate Investment Trusts. The Quarterly Review of Economics and Finance, 60: 224-230. ##Etienne, X.L., S.H. Irwin & P. Garcia. (2014). Bubbles in Food Commodity Markets: Four Decades of Evidence. Journal of International Money and Finance, 42: 129–155. ##Evans, G. (1991). Pitfalls in Testing for Explosive Bubbles in Asset Prices. American Economic Review, 81: 922-930. ##Fantazzini, D. (2016). The Oil Price Crash in 2014/15: Was There a (Negative) financial Bubble? Energy Policy, 96: 383-396. ##Figuerola-Ferretti, I. & J.R. McCrorie. (2016). The Shine of Precious Metals Around The Global Financial Crisis. Journal of Empirical Finance. ##Froot, K.A. & M. Obstfeld. (1991). Intrinsic Bubbles: The Case of Stock Prices. American Economic Review, 81(5): 1189-214. ##Gomez-Gonzalez, J.E., J.N. Ojeda-Joya, C. Rey-Guerra & N. Sicard. (2013). Testing for Bubbles in Housing Markets: New Results Using a New Method. Federal Reserve Bank of Dallas, Working Paper, No. 164. ##Greenspan, A. (2004). Risk and Uncertainty in Monetary Policy. Remarks at the Meetings of the American Economic Association, San Diego, California, January 3rd. ##Hassapis, C. & S. Kalyvitis. (2002). Investigating The Links Between Growth and Real Stock Price Changes with Empirical Evidence from the G-7 Economies. The Quarterly Review of Economics and Finance, 42(3), 543-575. ##Hatipoglu, O. & O. Uyar. (2012). Do Bubbles Spill Over? Estimating Financial Bubbles in Emerging Markets. Emerging Markets Finance and Trade, 48(5), 64-75. ##Kindleberger, C.P. (2001). manias, panics, and Crashes, A History of Financial Crises. New York. John Wiley & Sons. ##Komaromi, G. (2004). Was There a Stock Market Bubble in Hungary? Competitio, 3(1): 169-178. ##Koustas, Z. & A. Serletis. (2005). Rational Bubbles or Persistent Deviations from Market Fundamentals? Journal of Banking and Finance, 29: 2523-2539, 1-15. ##Lamont, O. (1998). Earnings and Expected Returns, Journal of Finance, 53: 1563-1587. ##Lucas, R.E. (1978). Asset Prices in an Exchange Economy. Econometrica, 46: 1429-1445. ##Nunes, M. & S.D. Silva. (2007). Rational Bubbles in Emerging Stock Markets. MPRA Paper2007, 4641: 1-10. ##Okpara, G. (2010). Do Rational Speculative Financial Bubbles Exist in the Nigerian Stock Market? Interdisciplinary Journal of Contemporary Research in Business. ##Phillips, P.C.B., S. Shi & J. Yu. (2012). Testing for Multiple Bubbles. Cowles Foundation Discussion Paper, (1843). ##Phillips, P.C.B., Y. Wu & J. Yu. (2011). Explosive Behavior in the 1990s Nasdaq: When Did Exuberance Escalate Asset Values? International Economic Review, 52: 201-226. ##Rangel, G. & S.S. Pillay. (2007). Evidence of Bubbles in the Singaporean Stock Market. Singapore Economic Review Conference, 2007. ##Shiller, R.J. (1981). Do Stock Prices Move Too Much to be Justified by Subsequent Changes in Dividends? American Economic Review, 71: 421-436. ##Shiller, R.J. (2015). Irrational Exuberance. Princeton University Press. ##Taylor, M. & D. Peel. (1998). Periodically Collapsing Stock Price Bubbles: A Robust Test. Economics Letters, 61: 221-228. ##Tsvetanov, D., J. Coakley & N. Kellard. (2015). Bubbling Over! The Behaviour of Oil Futures Along The Yield Curve. Journal of Empirical Finance. ##Wu, Y. (1997). Rational Bubbles in the Stock Market: Accounting for the U.S. Stock Price Volatility. Economic Inquiry, 35(2): 309-319. ##Yiu, M., J. Yu & L. Jin. (2012). Detecting Bubbles in Hong Kong Residential Property Market. Hong Kong Institute for Monetary Research, Working Paper, 1/2012. ##Zhang, Q., D. Sornette, M. Balcilar, R. Gupta, Z.A. Ozdemir & H. Yetkiner. (2016). LPPLS Bubble Indicators Over Two Centuries of the S&P 500 Index. Physica, 458: 126-139. ##Zhao, Y., H.l. Chang, C.W. Su & R. Nian. (2015). Gold Bubbles: When are They Most Likely to Occur? Japan and the World Economy, 34: 17-23. ##