In a sharp observation, scholars of a recent high-profile study, "Cash and the Economy: Evidence from India's Demonetization", whose results have been widely reported , have bemoaned: That there is lack of authentic official data on Gross Domestic Product (GDP) with the Government of India, forcing them to use “nightlights data”, a methodology usually adopted by top international scholars to assess socio-economic growth in highly underdeveloped countries of East Africa and parts of Asia, where no authentic ground level surveys are available to assess development.