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A menu-driven facility for complex sample size calculation in randomized controlled trials with a survival or a binary outcome: Update
Barthel, Friederike M.-S.; Royston, Patrick; Babiker, Abdel - In: Stata Journal 5 (2005) 1, pp. 123-129
Royston and Babiker (2002) presented a menu-driven Stata program for the calculation of sample size or power for … Stata 8 under the new name ART. Furthermore, the program has been extended to incorporate noninferiority designs and …
Persistent link: https://www.econbiz.de/10005568865
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Factorial designs, model selection, and (incorrect) inference in randomized experiments
Muralidharan, Karthik; Romero, Mauricio; Wüthrich, Kaspar - 2020
-tests provide valid inferences, "short" model t-tests (ignoring interactions) yield higher power if interactions are zero, but …. After including all interactions, over half their results lose significance. Modest local power improvements over the long … model are possible, but with lower power for most values of the interaction. If interactions are not of interest, leaving …
Persistent link: https://www.econbiz.de/10012174462
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Factorial designs, model selection, and (incorrect) inference in randomized experiments
Muralidharan, Karthik; Romero, Mauricio; Wüthrich, Kaspar - 2019
Persistent link: https://www.econbiz.de/10012172589
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How do voters respond to information? Evidence from a randomized campaign
Kendall, Chad; Nannicini, Tommaso; Trebbi, Francesco - 2013
Rational voters update their subjective beliefs about candidates' attributes with the arrival of information, and subsequently base their votes on these beliefs. Information accrual is, however, endogenous to voters' types and difficult to identify in observational studies. In a large scale...
Persistent link: https://www.econbiz.de/10010293129
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The effects of school libraries on language skills: Evidence from a randomized controlled trial in India
Borkum, Evan; He, Fang; Linden, Leigh L. - 2013
We conduct a randomized controlled trial of an Indian school library program. Overall, the program had no impact on students' scores on a language skills test administered after 16 months. The estimates are sufficiently precise to rule out effects larger than 0.053 and 0.037 standard deviations,...
Persistent link: https://www.econbiz.de/10010293236
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Experimental Evidence on the Long-Term Impacts of a Youth Training Program
Ibarrarán, Pablo; Kluve, Jochen; Ripani, Laura; Rosas … - 2015
This paper presents the results of a randomized controlled trial on the long-term impacts of a youth training program. The empirical analysis estimates labor market impacts six years after the training - including long-term labor market trajectories of young people - and, to the best of our...
Persistent link: https://www.econbiz.de/10011307347
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Microfinance at the margin: Experimental evidence from Bosnia and Herzegovina
Augsburg, Britta; de Haas, Ralph; Harmgart, Heike; … - 2012
We use an RCT to analyse the impact of microcredit on poverty reduction in Bosnia. The study population are loan applicants that would normally have just been rejected based on regular screening. We find that access to credit allowed borrowers to start and expand small-scale businesses....
Persistent link: https://www.econbiz.de/10010331004
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The National Solidarity Programme: Assessing the effects of community-driven development in Afghanistan
Beath, Andrew; Christia, Fotini; Enikolopov, Ruben - 2013
This paper describes the results of an impact evaluation of the National Solidarity Programme, a community-driven development programme in Afghanistan that created democratic village councils and funded small-scale development projects. Using a randomized controlled trial across 500 villages, we...
Persistent link: https://www.econbiz.de/10010333692
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Can Arts-Based Interventions Enhance Labor Market Outcomes among Youth? Evidence from a Randomized Trial in Rio de Janeiro
Calero, Carla; Gonzales, Veronica; Soares, Yuri; Kluve, … - 2014
This paper provides findings of a small-scale, innovative labor training program that uses expressive arts and theatre as a pedagogical tool. The corresponding life skills training component is combined with a technical component teaching vocational skills. To our knowledge, this is the first...
Persistent link: https://www.econbiz.de/10010368132
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Inference under covariate-Adaptive randomization
Bugni, Federico A.; Canay, Ivan A.; Shaikh, Azeem M. - 2016
study, we find that the non-conservative tests have substantially greater power than the usual two-sample t-test. …
Persistent link: https://www.econbiz.de/10011594331