An upgraded grid, with adequate high voltage cables and interconnections, is also a precondition for more effectively integrating LDC energy systems at an international level, thereby allowing cross-border trade of electricity. For some LDCs, particularly those with substantial hydroelectricity potential and large and relatively prosperous neighbours, electricity may offer significant potential for boosting export revenues. In some instances, however, this may give rise to tradeoffs, where electricity exports are an important source of hard currency and macroeconomic stability but also contribute to domestic shortages that constrain demand and economic activity, or cannot be readily diverted for domestic supply.