GROUPED VARIATION IN FACTOR SHARES: AN APPLICATION TO MISALLOCATION
研究发现工厂层面要素成本份额存在显著变异，通过聚类分析将其分解为个体和分组成分，并探讨分组变异对消除资源错配收益的影响，忽略分组变异可能高估收益达三分之一。
Abstract A striking feature of microlevel plant data is the presence of significant variation in factor cost shares across plants within an industry. We develop a methodology based on cluster analysis to decompose cost shares into idiosyncratic and group‐specific components. We apply our methodology to Chilean plant‐level data and find that group‐specific variation accounts for approximately one‐third of the variation in cost shares. We study the implications of these groups in cost shares on the gains from eliminating misallocation. We place bounds on their importance and find that ignoring them can overstate the gains from eliminating misallocation by up to one‐third .