According to the audit by the National Council of Applied Economic Research (NCAER), big-ticket projects of airport-related infrastructure and Mumbai Metro will contribute Rs 1,450 crore in income to country´s gross domestic product during the entire construction phase (2014-15 to 2018-19). It is supposed that one of the busiest airports in Asia Chhatrapati Shivaji International Airport (CSIA) is being developed under a public-private partnership (PPP). According to NCAER, in terms of indirect contribution, airport-related construction activities will contribute Rs 2,340 crore in income to the GDP during the entire construction phase (2014-15 to 2018-19). It says passenger traffic at CSIA is likely to touch 49 million by 2022-23. Similarly, the economic impact of construction activities at GVK SkyCity has also been calculated. This is a one-time impact and refers to the construction period.