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首页> 外文期刊>American economic journal >In Pursuit of Balance: Randomization in Practice in Development Field Experiments
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In Pursuit of Balance: Randomization in Practice in Development Field Experiments

机译:追求平衡:开发田间实验的实践中的随机化

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摘要

We present new evidence on the randomization methods used in existing experiments, and new simulations comparing these methods. We find that many papers do not describe the randomization in detail, implying that better reporting is needed. Our simulations suggest that in samples of 300 or more, the different methods perform similarly. However, for very persistent outcome variables, and in smaller samples, pair-wise matching and stratification perform best and appear to dominate the rerandomization methods commonly used in practice. The simulations also point to specific recommendations for which variables to balance on, and for which controls to include in the ex post analysis.
机译:我们提供了有关现有实验中使用的随机方法的新证据,并对这些方法进行了新的模拟。我们发现许多论文没有详细描述随机化,这意味着需要更好的报告。我们的模拟表明,在300个或更多的样本中,不同的方法表现相似。但是,对于非常持久的结果变量,在较小的样本中,成对匹配和分层效果最好,并且似乎主导了实践中常用的重新随机化方法。模拟还指出了具体的建议,以便在事后分析中平衡哪些变量以及包括哪些控件。

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  • 来源
    《American economic journal》 |2009年第4期|p.200-232|共33页
  • 作者

    MIRIAM BRUHN; DAVID MCKENZIE;

  • 作者单位

    Development Research Group, World Bank, MSN MC3-307, 1818 H Street N. W., Washington, DC 20433;

    rnDevelopment Research Group, World Bank. MSN MC3-307, 1818 H Street N. W., Washington, DC 20433;

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