A study:
http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2457000
Seems plausible. Other variables may be at play.
From 1961 to 1989, the Berlin Wall divided one nation into two distinct political regimes. We exploited this natural experiment to investigate whether the socio-political context impacts individual honesty. Using an abstract die-rolling task, we found evidence that East Germans who were exposed to socialism cheat more than West Germans who were exposed to capitalism.
http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2457000
Seems plausible. Other variables may be at play.