지역 간 물가지수 추정 엥겔곡선방법론의 정확도 검증과 실질소득불평등도
An assessment of the performance of a spatial Engel curve methodology and its implication in real inequality
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초록
본 연구는 상품가격자료 없이 통상적인 가계조사 자료만을 사용하여 지역 간 물가지수를 추정하는 엥겔곡선 방법론의 정확도를 연구한다. 엥겔곡선 실증방법론의 문제점과 보정방법을 이론적으로 분석하고, 실제 상품가격자료를 직접적으로 사용하는 통크비스트 물가지수 계산방법과 WCPD 방법론으로 추정된 지역 간 물가지수를 엥겔곡선 방법론 추정치와 비교함으로 엥겔 곡선 방법론의 정확도를 실증적으로 검증한다. 지역 간 물가지수를 감안한 실질 소득불평도와 최저생계비관련 빈곤정책에 관한 지역 간 물가지수의 정책적 시사점도 제시한다.
Abstract
We provide an assessment of the performance of an Engel curve methodology for estimating spatial price indices. We use a unique spatial price data and two conventional price index computation methods, binary Tornqvist and weighted country product dummy method for an ideal assessment of a spatial Engel curve. Poor performance of spatial Engel curve method for estimating spatial price indices implies a strong need for collecting direct spatial price data for calculating spatial price indices. We also provide some implications of a precise measurement of spatial price indices in implementing real inequality and poverty related policies.
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