Product expenditure patterns in the ECPF survey: an analysis using multiple group latent-variables models
- Autores: Eva Ventura Colera
- Localización: Questiió: Quaderns d'Estadística, Sistemes, Informatica i Investigació Operativa, ISSN 0210-8054, Vol. 25, Nº. 1, 2001, págs. 93-117
- Idioma: inglés
- Títulos paralelos:
- Patrones de consumo de productos en la Encuesta Continua de Productos Familiares (ECPF): un análisis mediante modelos de variables latentes de grupos múltiples
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Resumen
Using data form the Spanish household budget survey, we investigate some aspects of household heterogeneity on several product expenditures. We adopt a latent-variable model approach to evaluate the impact of income on expenditures, controlling for the number of members in the family. Two latent factors underlying repeated measures of monetary and non-monetary income are used as explanatory variables in the expenditure regression equations, thus avoiding possible bias associated to the measurement error in income. The proposed methodology also takes care of the case in which product expenditures exhibit a pattern of infrequent purchases. Multiple-group analysis is used to assess the variation of key parameters of the model across various household typologies. The analysis discloses significant variations across groups on the mean levels of expenditures and on the way income and family size affect expenditures. Asymptotic robust methods are used to account for possible non-normality of the data
