Bahmani-Oskooee, Mohsen; Ratha, Artatrana - In: Empirical Economics 35 (2008) 1, pp. 141-152
Backus et al. in (Am Econ Rev 84(1): 84–103, 1994) found that the cross-correlation function between terms of trade and trade balance resembles the letter S and labeled it the S-curve. Support for S-curve is rather weak in some cases, most notably US when aggregate trade data are used....