Using a Satisficing Model of Experimenter Decision-Making to Guide Finite-Sample Inference for Compromised Experiments
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- James J Heckman & Ganesh Karapakula, 2021. "Using a satisficing model of experimenter decision-making to guide finite-sample inference for compromised experiments," The Econometrics Journal, Royal Economic Society, vol. 24(2), pages 1-39.
- Ganesh Karapakula & James J. Heckman, 2020. "Using a Satisficing Model of Experimenter Decision-Making to Guide Finite-Sample Inference for Compromised Experiments," NBER Working Papers 27738, National Bureau of Economic Research, Inc.
References listed on IDEAS
- James Heckman & Seong Hyeok Moon & Rodrigo Pinto & Peter Savelyev & Adam Yavitz, 2010. "Analyzing social experiments as implemented: evidence from the HighScope Perry Preschool Program," CeMMAP working papers CWP22/10, Centre for Microdata Methods and Practice, Institute for Fiscal Studies.
- Kari Lock Morgan & Donald B. Rubin, 2015. "Rerandomization to Balance Tiers of Covariates," Journal of the American Statistical Association, Taylor & Francis Journals, vol. 110(512), pages 1412-1421, December.
- Cattaneo, Matias D., 2010. "Efficient semiparametric estimation of multi-valued treatment effects under ignorability," Journal of Econometrics, Elsevier, vol. 155(2), pages 138-154, April.
- Alberto Abadie & Susan Athey & Guido W. Imbens & Jeffrey M. Wooldridge, 2020. "Sampling‐Based versus Design‐Based Uncertainty in Regression Analysis," Econometrica, Econometric Society, vol. 88(1), pages 265-296, January.
- Rodrigo Pinto & Azeem Shaikh & Adam Yavitz & James Heckman, 2010.
"Inference with Imperfect Randomization: The Case of the Perry Preschool Program,"
2010 Meeting Papers
1336, Society for Economic Dynamics.
- James Heckman & Rodrigo Pinto, 2020. "Inference with Imperfect Randomization: The Case of the Perry Preschool Program," Working Papers 2020-97, Becker Friedman Institute for Research In Economics.
- James J. Heckman & Rodrigo Pinto & Azeem M. Shaikh & Adam Yavitz, 2011. "Inference with Imperfect Randomization: The Case of the Perry Preschool Program," NBER Working Papers 16935, National Bureau of Economic Research, Inc.
- Heckman, James J. & Pinto, Rodrigo & Shaikh, Azeem M. & Yavitz, Adam, 2011. "Inference with Imperfect Randomization: The Case of the Perry Preschool Program," IZA Discussion Papers 5625, Institute of Labor Economics (IZA).
- Joseph P. Romano & Michael Wolf, 2005.
"Exact and Approximate Stepdown Methods for Multiple Hypothesis Testing,"
Journal of the American Statistical Association, American Statistical Association, vol. 100, pages 94-108, March.
- Joseph Romano & Michael Wolf, 2003. "Exact and approximate stepdown methods for multiple hypothesis testing," Economics Working Papers 727, Department of Economics and Business, Universitat Pompeu Fabra.
- Chung, EunYi & Romano, Joseph P., 2016. "Multivariate and multiple permutation tests," Journal of Econometrics, Elsevier, vol. 193(1), pages 76-91.
- Joseph P. Romano & Azeem M. Shaikh & Michael Wolf, 2010.
"Hypothesis Testing in Econometrics,"
Annual Review of Economics, Annual Reviews, vol. 2(1), pages 75-104, September.
- Joseph P. Romano & Azeem M. Shaikh & Michael Wolf, 2009. "Hypothesis testing in econometrics," IEW - Working Papers 444, Institute for Empirical Research in Economics - University of Zurich.
- Matias D. Cattaneo, 2010. "multi-valued treatment effects," The New Palgrave Dictionary of Economics,, Palgrave Macmillan.
- James Heckman & Seong Hyeok Moon & Rodrigo Pinto & Peter Savelyev & Adam Yavitz, 2010.
"Analyzing social experiments as implemented: A reexamination of the evidence from the HighScope Perry Preschool Program,"
Quantitative Economics, Econometric Society, vol. 1(1), pages 1-46, July.
- James J. Heckman & Seong Hyeok Moon & Rodrigo Pinto & Peter A. Savelyev & Adam Yavitz, 2010. "Analyzing Social Experiments as Implemented: A Reexamination of the Evidence From the HighScope Perry Preschool Program," NBER Working Papers 16238, National Bureau of Economic Research, Inc.
- James J. Heckman & Seong Hyeok Moon & Rodrigo Pinto & Peter A. Savelyev & Adam Yavitz, 2010. "Analyzing Social Experiments as Implemented: A Reexamination of the Evidence From the HighScope Perry Preschool Program," Working Papers 201034, Geary Institute, University College Dublin.
- Heckman, James J. & Moon, Seong Hyeok & Pinto, Rodrigo & Savelyev, Peter A. & Yavitz, Adam, 2010. "Analyzing Social Experiments as Implemented: A Reexamination of the Evidence from the HighScope Perry Preschool Program," IZA Discussion Papers 5095, Institute of Labor Economics (IZA).
- Joseph P. Romano & Azeem M. Shaikh, 2010. "Inference for the Identified Set in Partially Identified Econometric Models," Econometrica, Econometric Society, vol. 78(1), pages 169-211, January.
- Herbert A. Simon, 1955. "A Behavioral Model of Rational Choice," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 69(1), pages 99-118.
- Miriam Bruhn & David McKenzie, 2009.
"In Pursuit of Balance: Randomization in Practice in Development Field Experiments,"
American Economic Journal: Applied Economics, American Economic Association, vol. 1(4), pages 200-232, October.
- Bruhn, Miriam & McKenzie, David, 2008. "In pursuit of balance : randomization in practice in development field experiments," Policy Research Working Paper Series 4752, The World Bank.
- Cunha, Flavio & Heckman, James J. & Lochner, Lance, 2006.
"Interpreting the Evidence on Life Cycle Skill Formation,"
Handbook of the Economics of Education, in: Erik Hanushek & F. Welch (ed.), Handbook of the Economics of Education, edition 1, volume 1, chapter 12, pages 697-812,
Elsevier.
- Cunha, Flavio & Heckman, James J. & Lochner, Lance John & Masterov, Dimitriy V., 2005. "Interpreting the Evidence on Life Cycle Skill Formation," IZA Discussion Papers 1675, Institute of Labor Economics (IZA).
- Flavio Cunha & James J. Heckman & Lance Lochner & Dimitriy V. Masterov, 2005. "Interpreting the Evidence on Life Cycle Skill Formation," NBER Working Papers 11331, National Bureau of Economic Research, Inc.
- Young, Alwyn, 2019. "Channeling Fisher: randomization tests and the statistical insignificance of seemingly significant experimental results," LSE Research Online Documents on Economics 101401, London School of Economics and Political Science, LSE Library.
- Alwyn Young, 2019. "Channeling Fisher: Randomization Tests and the Statistical Insignificance of Seemingly Significant Experimental Results," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 134(2), pages 557-598.
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- Zhao, Anqi & Ding, Peng, 2021. "Covariate-adjusted Fisher randomization tests for the average treatment effect," Journal of Econometrics, Elsevier, vol. 225(2), pages 278-294.
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More about this item
Keywords
randomized controlled trial; randomization tests; worst-case inference; least favorable null distributions; partial identification; small-sample hypothesis testing;All these keywords.
JEL classification:
- C10 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - General
- C40 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods: Special Topics - - - General
- I21 - Health, Education, and Welfare - - Education - - - Analysis of Education
NEP fields
This paper has been announced in the following NEP Reports:- NEP-EXP-2020-09-28 (Experimental Economics)
- NEP-ORE-2020-09-28 (Operations Research)
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