Q.What is meant by a 'mixed economy' in modern economic thought?

The mixed-economy idea grew directly out of the tension between the classical laissez-faire tradition and Marx's fully state-owned alternative.

A mixed economy is a modern economic model that deliberately combines features of both the classical free-market tradition and the state-planned alternative that Marxian thought pointed toward. In a mixed economy, most production and consumption decisions are left to private individuals and firms operating in competitive markets, guided by prices and profit — much as classical economists like Smith recommended — but the government also plays an active role: owning or regulating certain key industries, providing public goods (defence, infrastructure, education), redistributing income through taxation and welfare spending, and using fiscal and monetary policy (drawing on Keynesian ideas) to stabilise the overall level of output and employment. The mixed-economy model became especially influential among newly independent developing countries after the Second World War, including India, which adopted a mixed economy after 1947 — a private sector alongside public-sector industries and centralised Five-Year Plans — precisely …