How successful a revaluation is in removing a payments surplus depends on the reactions of export and import volumes to the change in relative prices, that is, the PRICE-ELASTICITY OF DEMAND for exports and imports. If these values are low, that is, demand is inelastic, trade volumes will not change very much, and the revaluation may in fact make the surplus larger. On the other hand, if export and import demand is elastic, then the change in trade volumes will operate to remove the surplus. BALANCE-OF-PAYMENTS EQUILIBRIUM will be restored if the sum of export and import elasticities is greater than unity (the MARSHALL-LERNER CONDITION).
Also, whether or not a revaluation ‘works’ in restoring balance-of-payments equilibrium depends on a number of factors, including the reaction of domestic firms and the effect of the government's other policies over the longer term (for example, the control of inflation). For business, a revaluation makes imports more price-competitive, putting pressure on domestic producers either to cut their prices or, alternatively, depend more on advertising and sales promotion. Likewise, in export markets, a firm may choose to hold its prices, accepting lower profit margins rather than increase them in order to maintain market share. Thus, in the short run, revaluations threaten firms’ current profitability and market position, putting firms under pressure to cut costs by improving productivity and generally placing a greater emphasis on PRODUCT DIFFERENTIATION as a means of remaining competitive against overseas suppliers. Contrast DEVALUATION.
See EXTERNAL-INTERNAL BALANCE MODEL.