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作者：Field, Erica; Robles, Omar; Torero, Maximo
作者单位：Harvard University; CGIAR; International Food Policy Research Institute (IFPRI)
摘要：Cognitive damage from iodine deficiency disorders (IDD) has important implications for economic growth through its effect on human capital. To gauge the magnitude of this influence, we evaluate the impact on schooling of reductions in IDD from intensive iodine supplementation in Tanzania. Our findings suggest a large effect of in utero iodine on cognition and human capital: treated children attain an estimated 0.35-0.56 years of additional schooling relative to siblings and older and younger p...
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作者：Olken, Benjamin A.
作者单位：Massachusetts Institute of Technology (MIT)
摘要：This paper investigates the impact of television and radio on social capital in Indonesia. I use two sources of variation in signal reception one based on Indonesia's mountainous terrain, and a second based on the differential introduction of private television throughout Indonesia. I find that increased signal reception, which leads to more time watching television and listening to the radio, is associated with less participation in social organizations and with lower self-reported trust. Imp...
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作者：Heffetz, Ori; Shayo, Moses
作者单位：Cornell University; Hebrew University of Jerusalem
摘要：Elementary consumer theory assumes prices affect demand only because they affect the budget constraint (BC). Alternative models, and some evidence, suggest prices can affect demand through other, non-BC channels (e.g., by signaling quality). This paper uses a lab and a field experiment to disentangle BC from non-BC effects of prices on demand. In the lab, we find that although prices positively affect stated willingness to pay, non-BC price elasticities are considerably smaller than BC price e...
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作者：Jackson, Kirabo; Bruegmann, Elias
作者单位：Cornell University; United States Department of Labor; Cornerstone Research
摘要：Using longitudinal elementary school teacher and student data, we document that students have larger test score gains when their teachers experience improvements in the observable characteristics of their colleagues. Using within-school and within-teacher variation, we show that a teacher's students have larger achievement gains in math and reading when she has more effective colleagues (based on estimated value-added from an out-of-sample pre-period). Spillovers are strongest for less experie...
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作者：Guryan, Jonathan; Kroft, Kory; Notowidigdo, Matthew J.
作者单位：University of Chicago; National Bureau of Economic Research; Massachusetts Institute of Technology (MIT)
摘要：This paper uses random assignment in professional golf tournaments to test for peer effects in the workplace. We find no evidence that playing partners' ability affects performance, contrary to recent evidence on peer effects in the workplace from laboratory experiments, grocery scanners, and soft fruit pickers. In our preferred specification, we can rule out peer effects larger than 0.043 strokes for a one stroke increase in playing partners' ability. Our results complement existing studies o...
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作者：Bruhn, Miriam; McKenzie, David
作者单位：The World Bank
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 rerandomiza...
