There isn't much to say about the level of productivity in communist countries... there is very little. The 'God that Failed' doesn't generate much desire to work. The power of Allah seems to be the power to keep people from being productive. The same seems to be true of nearly all Catholic nations, think Latin America, where a centralized God has a strong influence on a centralized government and work is not productive. Lastly, there is Europe, where unions are blamed for low productivity but the reality is that the centralized governments maintain the power of unions and the centralized governments are God-like in their intrusion in the lives of Europeans.
To put it another way...the highly productive people of the world, Americans, Israelis, Japanese and some other Asians all have decentralized religious institutions.