The experiment described in the paper is registered at AEA RCT registry, ID AEARCTR-0009691. The Supplemental Ethics Appendix presents the background of the study (Section 1), the ethics of experimentation (Sections 2, 3, 4), the ethics of the data collection (Section 5), financial and reputational conflicts of interest (Section 6), concerns about intellectual freedom (Section 7), issues concerning feedback to relevant stakeholders from this study (Section 8), and foreseeable misuse of research results (Section 9). This project was supported by Private Enterprise Development in Lowincome countries, University of Antwerp (Fonds voor Wetenschappelijk Onderzoek), and the International Growth Centre. We are thankful to the researchers and individuals who collected the data, and, in chronological order,
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