One version of the theory states that price information is just that - information - and you can't replace that with even excellent planning.
You could call China a hybrid of a planned/free economy, but as it's moved more to something akin to free markets, wealth has gone up, especially for the poorest there. This may be as close to an experiment as we can get in economics. Chinese Communism was never quite Soviet style Communism, but the results begin to look suspiciously like data.
>By exercising central control they should have been able to drastically reduce
people's entrepreneural activity as well as overall productivity. (note: i was born and grew up in USSR)
One of the most colorful examples of this comes not from economics, but a strange book on advertising called "The Hidden Persuaders". It also talks about erotic images airbrushed into the ice cubes of whiskey ads :) When I'd first heard of "Mad Men", I'd hoped it would be about that, but it wasn't.
I don't understand why even try to centrally plan the economy. It's stupid and doesn't make sense. Even if it was possible it would require resources to centrally run it. There would be no competitive edge because the economy is based on the people who participate in it. The information is already out there. It's publicly accessible. Centrally planning it would create an unnecessary middleman and break the perfect solution.
edit: clarification.