On a startup side, there is actually is a big difference between common law (e.g. Anglo) and civil law (e.g. Franco) systems - with common law being more advantageous to entrepreneurship because of the reduced risk of arbitrary laws - unlike precedence in common law systems.
PDF: http://moritzlaw.osu.edu/eblj/issues/volume1/number2/Smith.p...
"The wider the range of possible transgressions, the greater the amount of potential information available for mutual blackmailing... Italy is a country with a high level of corruption that has proved hard to explain...Italy has in excess of 100,000 laws and regulations...The probability of living a life, indeed of going through the day, without incurring at least one violation must be virtually zero for Italians... It seems plausible therefore to hypothesize that the high levels of corruption in Italy could depend on the fact that everybody has some dirt on everybody else."
My apologies if I have been misled by this.
I would agree that common law is more advantageous, because stare decisis ensures that the continuity of existing law is maintained, and that even new statute law must be interpreted in a way consistent with the existing system of law. Civil law, which relies entirely on statutes, allows legislatures much more leeway to make sweeping, arbitrary changes.