Rashmi Sehgal Thukral Jesus and Mary College, University of Delhi   Department of Mathematics, Jesus and Mary College, Chanakyapuri New Delhi, Delhi 110021 India   rthukral@jmc.du.ac.in   https://www.jmc.ac.in/academics/departments/maths/faculty           JEL Areas: J1 : Demographic Economics: General J2 : Demand and Suppply of Labor: General