TY - RPRT AU - Huntington-Klein, Nick AU - Arenas, Andreu AU - Beam, Emily A. AU - Bertoni, Marco AU - Bloem, Jeffrey R. AU - Burli, Pralhad AU - Chen, Naibin AU - Greico, Paul AU - Ekpe, Godwin AU - Pugatch, Todd AU - Saavedra, Martin AU - Stopnitzky, Yaniv TI - The Influence of Hidden Researcher Decisions in Applied Microeconomics PY - 2020/May/ PB - Institute of Labor Economics (IZA) CY - Bonn T2 - IZA Discussion Paper IS - 13233 UR - https://www.iza.org/index.php/publications/dp13233 AB - Researchers make hundreds of decisions about data collection, preparation, and analysis in their research. We use a many-analysts approach to measure the extent and impact of these decisions. Two published causal empirical results are replicated by seven replicators each. We find large differences in data preparation and analysis decisions, many of which would not likely be reported in a publication. No two replicators reported the same sample size. Statistical significance varied across replications, and for one of the studies the effect's sign varied as well. The standard deviation of estimates across replications was 3-4 times the typical reported standard error. KW - metascience KW - replication KW - research ER -