However, the Cameroon economy benefits less from the positive trade effect because of the greater fall in the prices of energy products. If Ghana's favourable terms of trade developments, associated with continuing strong export prices for its two main exports (gold and cocoa) and greater exposure to external trade, has contributed to substantially improve its trade deficit, the importance of foreign investment in the country renders it particularly vulnerable to its reduction during the crisis. Table 6 shows a relative increase in the average real price of imports and a relative fall in the average real price of exports. However, the decline in export volumes is less than that of import volumes for the same period. The nature of the products exported by these two groups of countries is the main cause of this difference. Developing countries, including those covered by our analysis, mainly export agricultural and mining goods to industrialized and emerging countries whereas they mainly import from these countries manufactured goods and services.