Even as questions are being raised over GDP calculations after NSSO discovered holes, the Principal Economic Advisor in the Ministry of Finance on Friday said \u2018unnecessary politicisation\u2019 of government\u2019s every decision is unwarranted. Before questioning the new database, the critics must understand a wider context, Sanjeev Sanyal tweeted. Accepting the new data may have flaws, he said that even the earlier system lacked perfection. Those debating over the credibility of MCA-21 data in the national accounts should read the Rangarajan Commission report released in 2001 which highlighted several loopholes in the earlier system, he said, adding it\u2019s an ongoing effort to \u201cconstantly upgrade the reading of the economy.\u201d A fresh debate got fuelled after the NSSO study conducted in the 12 months ended June 2017 and released last week said that nearly one-third of the companies that are part of MCA-21 database and used in GDP calculations could not be traced. Also read: GDP data debate: Economists create own benchmarks as doubt on numbers stays \u201cRangarajan Commission 2001 had suggested the use of a new dataset with Department of Corporate Affairs (now MCA) with 21 digit CIN. This was seen as an improvement on the older system\u201d, he tweeted. The government has made unparalleled efforts in the past few years to completely remove shell firms from the system, the economist said. \u00a0However, it\u2019s not advisable to remove these companies for the purpose of national accounting as they may be capturing economic activity, even if they are not paying taxes, the former Deutsche Bank top executive also tweeted. In June 2015, the MOSPI had launched a new series of national accounts with new methodology and data sources. The base year was also revised to 2011-12. The fresh calculations according to the new GDP series put UPA behind NDA on growth front in the period under review.