Bactra Review    A Future for Socialism
Roemer has some considerations on how to prevent various sorts of cheating on the coupon stock market, and the conversion of coupons to cash. (These are the source of the restrictions on international capital flow, which are not so much to keep foreign investors out as to keep citizens from encashing their coupons indirectly.) As a devoted reader of the RISKS forum, I'd say he's too sanguine about the reliability of software; but we already rely on human agencies to prevent all sorts of financial mischief.