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Income elasticity of demand within individual consumer groups and the level of income elasticity of the entire market demand

机译：单个消费群体内需求的收入弹性以及整个市场需求的收入弹性水平

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The paper is focused on the derivation of the mathematical relationship among the income-elasticity level of the entire market demand and the income-elasticity values of the demand functions of the consumers' groups buying on the defined market. The determination of the mathematical term was based on the linearity of the relevant demand functions. Under the linearity assumption, the income elasticity coefficient of the entire market demand equals the weighted sum of the income-demand elasticities ofthe differentiated consumer groups buying on the given market. The weights in the aggregation formula are defined as the related demand shares, i.e. as the proportions of the groups' demands to the entire market demand. The derived aggregation equation is quite held if no demand interactions (e.g. the snob or fashion effect) are recorded among differentiated consumers' groups. The derived formula was examined by using empirical data about the consumer behaviour of Czech households in the market of meatand meat products (Czech Statistical Office). However, the application potential of the achieved term for the income-elasticity aggregations is much broader within the consumer-behaviour analysis. In addition to the subject aggregations of the demand functions, we can also apply the derived formula for the analysis and estimations of the income elasticities within the demand-object aggregations, i.e. the multistage analysis of the income elasticity of consumer demand. Another possibility of the use of the aggregation equation is for the evaluations and estimations of the income elasticity of the region-demand functions in relation to the subregions' demands or reversely.
机译：本文着重于推导整个市场需求的收入弹性水平与在定义的市场上购买的消费者群体的需求函数的收入弹性值之间的数学关系。数学项的确定基于相关需求函数的线性。在线性假设下，整个市场需求的收入弹性系数等于在给定市场上购买的不同消费群体的收入需求弹性的加权总和。聚合公式中的权重定义为相关需求份额，即组需求占整个市场需求的比例。如果在不同的消费者群体之间未记录任何需求交互（例如势利或时尚效应），则导出的聚合方程将完全成立。通过使用有关捷克家庭在肉类和肉类产品市场上的消费行为的经验数据来检验得出的公式（捷克统计局）。但是，在消费者行为分析中，所获得的期限对收入弹性聚合的应用潜力要大得多。除了需求函数的主题集合外，我们还可以将导出的公式应用于需求对象集合内的收入弹性的分析和估计，即消费者需求的收入弹性的多阶段分析。使用聚合方程的另一种可能性是用于评估和估计区域需求函数相对于次区域需求或相反的收入弹性。

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