How well are long-run commodity price series characterized by trend components?

Various studies have investigated trends in commodity prices in the context of the Prebisch Singer Hypothesis. This paper applies new evidence on significance tests for trends in differenced and correlated stationary processes, to individual price series. It is also investigated how well trends are suited for price forecasts and what these findings imply for developing countries. Few commodity price series are well characterized by a trend and trends are useful for forecasting in even fewer cases. Commodity specialization is still problematic for LDCs but the main issue is a lack of predictability rather than a secular decline. Copyright © 2005 John Wiley & Sons, Ltd.

[1]  Paul Newbold,et al.  Testing for Linear Trend with Application to Relative Primary Commodity Prices , 2003 .

[2]  P. Cashin,et al.  The Long-Run Behavior of Commodity Prices: Small Trends and Big Variability , 2001, SSRN Electronic Journal.

[3]  H. Bloch,et al.  Whither The Terms Of Trade? An Elaboration Of The Prebisch-Singer Hypothesis , 2000 .

[4]  Matthias Lutz.  Commodity terms of trade and individual countries' net barter terms of trade: Is there an empirical relationship? , 1999 .

[5]  Matthias Lutz,et al.  A General Test of the Prebisch-Singer Hypothesis , 1999 .

[6]  Francis X. Diebold,et al.  Unit-Root Tests Are Useful for Selecting Forecasting Models , 1999 .

[7]  Hongguang Sun,et al.  Testing for trends in correlated data , 1999 .

[8]  Structural Breaks and Long-Run Trends in Commodity Prices , 1997 .

[9]  Paul Newbold,et al.  Drift in the relative price of primary commodities: a case where we care about unit roots , 1996 .

[10]  Paul Newbold,et al.  EMPIRICAL EVIDENCE ON DICKEY-FULLER-TYPE TESTS , 1992 .

[11]  John T. Cuddington,et al.  Long-run trends in 26 primary commodity prices: A disaggregated look at the Prebisch-Singer hypothesis , 1992 .

[12]  James G. MacKinnon,et al.  Critical Values for Cointegration Tests , 1990 .

[13]  P. Perron,et al.  The Great Crash, The Oil Price Shock And The Unit Root Hypothesis , 1989 .

[14]  John T. Cuddington,et al.  Trends and Cycles in the Net Barter Terms of Trade: A New Approach , 1989 .

[15]  E. R. Grilli,et al.  Primary Commodity Prices, Manufactured Goods Prices, and the Terms of Trade of Developing Countries , 1988 .

[16]  David Sapsford,et al.  The Statistical Debate on the Net Barter Terms of Trade Between Primary Commodities and Manufactures , 1985 .

[17]  J. Spraos.  The Statistical Debate on the Net Barter Terms of Trade between Primary Commodities and Manufactures , 1980 .