Using a Ricardo model, this study aims to assess the impact of climate change on agricultural incomes in northern Cameroon. The data used comes from a survey of 450 farming households in 23 villages. The results indicate that a 1-mm increase in rainfall leads to an increase of 12.68 dollars in farm income per hectare in summer, 0.92 dollars in winter, 9.59 dollars in spring and 13.30 dollars in autumn. On the other hand, a 1 °C increase in temperature leads to a decrease in net farm income per hectare of 3.54 dollars in summer, 1.26 dollars in winter, 3.40 dollars in spring and 6.11 dollars in autumn. In addition, the hypothesis of a non-linear relation has been validated. An increase in autumn temperatures benefits net farm income up to a maximum point, after which very high temperatures begin to be harmful to crop growth and productivity and consequently reduce farm income. Concerning precipitations, autumn and summer rainfall significantly positively affect net farm income up to a certain maximum point, after which the excess becomes harmful to crops. Furthermore, the study found that farm income is more sensitive to precipitation than to temperature. The policy implications of these findings are equally discussed.

本研究旨在利用李嘉图模型评估气候变化对喀麦隆北部农业收入的影响。所用数据来自对23个村450户农户的调查。结果表明，降雨量每增加1毫米，夏季每公顷农场收入增加12.68美元，冬季增加0.92美元，春季增加9.59美元，秋季增加13.30美元。另一方面，气温每升高1℃，每公顷农场净收入夏季减少3.54美元，冬季减少1.26美元，春季减少3.40美元，秋季减少6.11美元。此外，非线性关系的假设也得到了验证。秋季气温的升高有利于农业净收入达到最高点，之后极高的气温开始损害作物生长和生产力，从而减少农业收入。就降水而言，秋季和夏季降雨对农业净收入有显着的积极影响，直至达到某个最高点，之后过多的降雨就会对作物造成损害。此外，研究发现，农业收入对降水量比对温度更敏感。这些发现的政策影响也得到了同样的讨论。