India has a developing mixed economy with a notable public sector in strategic sectors. It is the world's sixth-largest economy by nominal GDP and the third-largest by purchasing power parity (PPP) as of April 2026. On a per capita income basis, the is nation ranked 149th by nominal GDP and 119th by PPP-adjusted GDP as 2026. From independence in 1947 until 1991, economic development was characterized by protectionist economic policies, with extensive state intervention, demand-side economics, natural resource optimization, and regulation. An acute balance of payments crisis in 1991 led to the adoption of a broad economic liberalisation in India and indicative planning. India has about 1,900 public sector companies under a variety of public–private partnership (PPP) models. The government plays a major role in sectors like supercomputing, space and shipping but private participation is growing, especially in space, telecom, and satellite communications.