(By) Dr Surjit Singh Bhatti, Guru Nanak Dev University, Amritsar The 2019 Sverige Riksbank Prize in Economic Sciences in the Memory of Alfred Nobel was awarded jointly to Dr Abhijit V, Banerjee, his wife Dr Esther Duflo (both of MIT, USA), and Dr Michael Kremer (of Harvard University, Cambridge, USA), “for their experimental approach to…