Another example to a much larger extreme is North Korea vs South Korea. It stifled growth and market.
Maybe there are other differences between N Korea and S Korea other than their economic models?
- North Korea's ground: mostly mountains and red clay. Unlike S Korea, nothing grows here without heavy fertilization. This point will become important later.
- Before 1975, N Korea was doing better than S Korea economically. Then the Japanese migrated their industry to S Korea because it was a very poor country. They bring in raw materials and get a product made with cheap labor. The technology to make products is simply offered in the process.
- N Korea is extremely energy dependent - has no gas, no oil, no coal. They were going to buy nuclear power plants from the Soviets, but after the dissolution of USSR, the Americans put pressure on Russia and the project got cancelled.
- N Korea decides to build their own power plants. USA offers to Kim Il-sung to cancel his nuclear program and in exchange the Americans will build nuclear power plants with their own money. And while they're building them, they're supposed to ship oil in order to compensate for the lack of nuclear energy.
- N Korea cancels its nuclear program. Americans haven't built anything, but they're shipping oil. Then G Bush becomes president and says N Korea lacks democracy, therefore the "humanitarian" shipments of oil end now.
- Sanctions start. Banks that let N Korean payments through get closed. The Japanese stop N Korean cargo in the sea and confiscate all shipments under pretense that they can be used to build nuclear weapon. All trade becomes impossible.
- Under sanctions for a quarter of a century. No possibility to sell products => no possibility to buy energy => the chemical industry cannot work => no fertilization => harvest yields fall down significantly => half a country is half-starving.
- Because of this, they have to use gas generators like the ones that were used in WW2 (they burn wood, peat, etc, just so the machine can drive). A lot of stuff they have to do manually, like collect crops in the fields. They turn off electricity at night. Sometimes they have no hot water.
- One country trades with the whole world, they had free access to Japanese technologies in the 80s, they have all the favorable conditions. Another country lives in an economic blockade. And then somewhere someone inevitably says "Another example to a much larger extreme is North Korea vs South Korea. It stifled growth and market."
Communism is a broken control mechanism that gains traction by touting fears that people will be devalued and unrewarded by society - only to be devalued and unrewarded by the government.
Communism has never been implemented where it didn't lead to the powerful stepping on the weak making their population ineffective and unable to compete with a free market.
Communism in itself isn't even opposed to free market. Read Marx's Capital, the whole book is about how the added value must be distributed
in the free market.
There are communists that prefer state planned economy, but even that idea doesn't exclude the possibility of small businesses and healthy competition.
For instance, during the Stalin era, USSR had not only state, but also private companies - they were called artels. An example of communism that didn't monopolize means of production. And as for competition, when the country needed a new plane, they held competition between different aircraft construction bureaus and chose the best offered model, much like it is done today in capitalist countries.