Savings and the terms of trade under borrowing constraints

The authors examine the extent to which permanent terms-of-trade shocks have an asymmetric effect on private savings. Using a simple three-period model, they show that if households expect to face binding constraints on borrowing in bad states of nature (when the economy is in a long trough rather than a sharp peak). Savings rates will respond asymmetrically to favorable movements in the permanent component of the terms of trade - in contrast with the predictions of conventional consumption-smoothing models. They test the asymmetric effects of terms-of-trade disturbances using an econometric model that controls for various standard determinants of private savings. The results - based on panel data for non-oil commodity exporters of Sub-Saharan Africa for 1980-96 (a group of countries for which movements in the terms of trade have traditionally represented a key source of macroeconomic shocks) - indicate that increases in the permanent component of the terms of trade (measured using three alternative filtering techniques) indeed tend to be associated with higher rates of private savings.(This abstract was borrowed from another version of this item.)