Supplementary material This documentation provides information on the files and folders contained in the supplementary material. Note that all .do and .R files in the supplementary material are meant to be run directly from the folder containing them. 1.contracts\ 1.1.contracts\RegulationContractsModPas.do Contains calculations for the results reported in section 3.2 and for Table 5 of the paper. 2.globals\ Contains data potentially used in analysis. 3.infodata\ Contains data potentially used in analysis. 4.predictions\ 4.1.Predictions\Regulation_predictions.do Contains calculations for Tables 2-4 of the paper. 4.2.Predictions\Regulation_predictions_DetectionProb.do Contains calculations for the results reported in section 3.1 of the paper. 5.subjects\ Contains data potentially used in analysis. 6.timelog\ 6.1.timelog\Regulation_timelog.do Contains calculations for Figure 4 and Figure A1 of the paper. 7.z-Tree\ This folder contains the experimental software. 7.1.z-Tree\*.zdata Parameter files for group assignment, market assignment, subject identifiers etc. used in the experimental software. 7.2.z-Tree\z-Tree_Documentation.pdf Documentation of all variables used in the z-Tree experimental software. 8.DetectionProbability.xlsx Contains data for Table 2 in the paper. Based on 4.1 Predictions\Regulation_predictions.do, section stata02. 9.groups.zdata Overview of group IDs. Used In some analyses. 10.Insider_regulation_data.do Stata .do file which processes the raw z-Tree output data (see section 12 of this document) in preparation for all analyses. 11.PowerAnalysis.R Contains all post-hoc power analyses reported in sections 3.1 and 3.2 of the paper. 12.PUN*_C*.xls Original z-Tree output files containing all experimental results. These are processed into Stata format in Insider_regulation_data.do. 13.ResultsWithReferences.pdf The file “ResultsWithReferences.pdf” contains the results section of the paper, including (in blue) references to the analysis scripts described in the present document.