CAJ | 학술논문

Broda和Weinstein（2006）考虑种类变化的精确进口价格指数因忽略了进口质量变化，会高估一国进口价格指数，引致进口贸易利得的估算出现实质性偏误。本文基于Benkovskis和Woerz（2011）的理论框架，利用1995～2011年CEPII-BACI数据库HS-6位数产品的中国进口数据，考察进口质量变化对于精确进口价格指数的影响，测算因假定质量不变引起的价格偏误，进而评估进口质量提高引致的贸易利得。研究发现，忽略质量变化会导致精确进口价格指数累计向上偏误19．9％，质量提高带来的贸易利得为2011年GDP的3．68%。更进一步，本文重点考察了质量变动引起的价格偏误指数在产业部门、生产阶段等多个维度上的分解，发现质量变化对进口价格偏误指数具有最大正贡献的产业和生产阶段分别为“化学品及化学制品的制造”和“半制成品”。
Broda화Weinstein（2006）고필충류변화적정학진구개격지수인홀략료진구질량변화，회고고일국진구개격지수，인치진구무역리득적고산출현실질성편오。본문기우Benkovskis화Woerz（2011）적이론광가，이용1995～2011년CEPII-BACI수거고HS-6위수산품적중국진구수거，고찰진구질량변화대우정학진구개격지수적영향，측산인가정질량불변인기적개격편오，진이평고진구질량제고인치적무역리득。연구발현，홀략질량변화회도치정학진구개격지수루계향상편오19．9％，질량제고대래적무역리득위2011년GDP적3．68%。경진일보，본문중점고찰료질량변동인기적개격편오지수재산업부문、생산계단등다개유도상적분해，발현질량변화대진구개격편오지수구유최대정공헌적산업화생산계단분별위“화학품급화학제품적제조”화“반제성품”。
The exact import price index developed by Feenstra （1994）, Broda and Weinstein （2006） underestimates the gains from trade due to the neglect of quality. This paper aims to provide the first comprehensive measure of gains from imported quality for China. Based on theoretical framework of Benkovskis and Woerz （2011）, utilizing the most disaggregated product-level import data available for China, we show that the welfare gains due to improved imported quality during 1995 to 2011 amounts to 3.68 percent of GDP. Moreover, by decomposing the welfare gains, we find that ＂manufacture of chemicals and chemical products＂ and ＂processed goods＂ are the biggest contributors to the gains.