Article History
Received: 21 May 2019
Accepted: 17 December 2019
First Online: 27 December 2019
Ethics approval and consent to participate
: The data analysed for this article are from the National Sample Survey, 60th and 71st Round, which contains anonymised data in the public domain. The researchers had no access to personal identifiable data. The survey is undertaken by the National Sample Survey Office (NSSO) of the Ministry of Statistics and Programme Implementation of the Government of India. Data available in public domain are approved for use for research purpose by Ministry of Statistics and Programme Implementation, Government of India.
: Not applicable.
: The authors declare that they have no competing interests.