The Globalization Institute has an article
on a recent report titled "Trade Justice or Free Trade?" that demonstrates the economically depressing effects of centrally-planned trade policy:
The Trade Justice Movement's support for managed trade, with price supports and quotas, is shown to cause poverty by reducing the world economy's ability to create wealth. The Movement's ideas for controlling world trade are impractical and would lead to the Sovietization of the world economy.
According to Alex Singleton, the report's author: "The Trade Justice Movement thinks the world economy would work better if it were centrally planned. We saw central planning in the Soviet Union and all it produced was poverty. The only trade that has ever lifted countries out of poverty is free trade."
The entire report is available here (179K PDF file).