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Authors
Sheiman, Igor https://orcid.org/0000-0002-5238-4187
Shishkin, Sergey https://orcid.org/0000-0002-0807-3277
Sazhina, Svetlana https://orcid.org/0000-0002-2023-3384
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Article History
Received: 17 December 2021
Accepted: 1 April 2022
First Online: 15 April 2022
Declarations
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: National Research University High School of Economics has a “Commission on the intra university surveys and ethical reviews of empirical research projects” . Projects under the Basic research program do not require an ethics approval statement from this commission. The authors are ready to participate.
: Igor Sheiman, Sergey Shishkin, Svetlana Sazhina agree to publish this paper.
: The authors declare that they have no competing interests.
