尼日利亚埃努古州土著断奶食品市场竞争

O. Ojogho, I. O. Olisakwe
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摘要

理想的断奶食品必须是目标市场负担得起的。然而,很难先验地断言这个价格有多大的竞争力。对于尼日利亚埃努古州的本地断奶食品市场,一项关于竞争性质和社会影响的研究是积极的。该研究使用了尼日利亚埃努古州207个本地断奶食品市场的横截面数据,使用修正后的赫芬达-赫希曼指数(HHI)、勒纳指数以及需求弹性来检查企业的结构、行为和福利损失。对该州和全州地方政府区域(lga)市场集中度指数的估计表明,断奶食品市场不集中,因为修正后的HHI小于1000,尽管该州地方政府区域市场之间的比较差异和相对差异存在差异。有证据表明,断奶食品公司收取的价格是边际成本的4.484到8.065倍。该州阿古州的akamu-joro公司的福利损失约占收入的42%,埃努古州的akamu-okiri和akamu-joro公司的福利损失为35%,恩苏卡州的akamu-okiri和akamu-joro公司的福利损失为36%,如果断奶食品公司处于纯垄断经济状态,福利损失分别增加到45.6%、41.5%和42.4%,福利损失分别增加约4%、7%和6%。很明显,埃努古州的本地断奶食品市场既不是完全纯粹的竞争,也不是垄断。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Indigenous Weaning-foods Markets Competition in Enugu State, Nigeria
An ideal weaning food must be affordable to the target market. However, it is difficult to assert, a priori, how competitive the price. For indigenous weaning-foods markets in Enugu State, Nigeria, a study on the nature of competition and societal impact is pro-active. The study used data from a cross-section of 207 indigenous weaning-foods markets in Enugu State, Nigeria to examine the structure, conduct and welfare loss of the firms using the corrected Herfindah-Hirschman Index (HHI), the Lerner index together with the elasticity of demand. The estimates of the market concentration index in the State and across the Local Government Areas (LGAs) of the State showed that weaning-foods markets are unconcentrated, as the corrected HHI was less than 1000, though with difference in comparative difference and relative difference across markets in the LGAs of the State. There was evidence that weaning-foods firms charge a price that range from 4.484 to 8.065 times the marginal cost. The State experienced a welfare loss of about 42% of revenue among akamu-joro firms in Agwu LGA, 35% among akamu-okiri and akamu-joro firms in Enugu LGA, and 36% among akamu-okiri and akamu-joro firms in Nsukka LGA of the State which increased respectively to 45.6%, 41.5% and 42.4% if the weaning-foods firms were in pure monopoly economy leaving an increase in welfare loss of about 4%, 7% and 6%, respectively. It is evident that indigenous weaning-food markets in Enugu State are neither entirely pure competition nor monopolies.
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