运用个体水平随机化处理了解市场结构

IF 5.5 1区经济学 Q1 ECONOMICS

American Economic Journal-Applied Economics Pub Date : 2022-10-01 DOI:10.1257/app.20200306

L. Casaburi, T. Reed

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引用次数: 10

摘要

随机对照试验中竞争企业之间的干扰可以提供有关市场结构的信息。一项实验向从塞拉利昂农民那里购买可可的随机贸易商提供补贴，说明了这一想法。通过古诺竞争模型来解释从农民手中购买的价格和数量上的待遇控制差异，可以发现贸易商之间的差异很低。将这一结果与世界价格的准实验变化相结合，表明竞争的贸易商数量比在一个村庄经营的贸易商数量高出50%。自有价格和交叉价格供给弹性高。在价值链的第一阶段，农民面临着竞争激烈的市场。(jel l13, l14, o13, q12, q13)

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Using Individual-Level Randomized Treatment to Learn about Market Structure

Interference across competing firms in RCTs can be informative about market structure. An experiment that subsidizes a random subset of traders who buy cocoa from farmers in Sierra Leone illustrates this idea. Interpreting treatment-control differences in prices and quantities purchased from farmers through a model of Cournot competition reveals differentiation between traders is low. Combining this result with quasi-experimental variation in world prices shows that the number of traders competing is 50 percent higher than the number operating in a village. Own-price and cross-price supply elasticities are high. Farmers face a competitive market in this first stage of the value chain. (JEL L13, L14, O13, Q12, Q13)

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来源期刊

American Economic Journal-Applied Economics ECONOMICS-

CiteScore

9.10

自引率

1.60%

发文量

期刊介绍： American Economic Journal: Applied Economics publishes papers covering a range of topics in applied economics, with a focus on empirical microeconomic issues. In particular, we welcome papers on labor economics, development microeconomics, health, education, demography, empirical corporate finance, empirical studies of trade, and empirical behavioral economics.