>>834I can tell you about Yugoslavia.
During the war the agrarian country's miniscule industry was demolished, alongside with most of infrastructure. The whole country was rebuilt in like 5 years after the war.
Between 1945-1948 they followed the Soviet model, but due to a falling out they started looking for their own way to build socialism and that was workers' self management, which started in 1950, but was expanded in the 70s.
Up until '65 the country had like an average 9 % yearly growth, between 1945 and 1990 the average growth was ~ 5,5 %.
However in 1965 there a stagnation happened and the party leadership didn't know how to react so they re-introduced the market. Also the population wanted more consumer goods and the market was a good way to deliver those as well. However, this is how capitalist competition between companies started and some did well - especially those doign business with the West, and other had loses every year (and didn't go bankrupt because the state wouldn't allow for a company in a socialist country to go bankrupt).
Due to its "middle" position between East and West, Yugoslavia took on loans from the West, especially in the 70's to further develop itself, but the interest rates at the end of the 70's and the 80's were increased greatly (the debt crisis which affected the whole world). Durign the economic slump nationalist tendecies prevailed and every federative republic started pulling in its own way, thus the federal state and government started to crack.