Mandatory arbitration clauses don’t appear to be harming borrowers, a new study paid for by the American Bankers Association suggests. The study, conducted by accounting firm Ernst & Young and based on data provided by the National Arbitration Forum, found that consumers got “favorable” results in 55 percent of the 226 arbitration cases they initiated between January of 2000 and January 2004. The proportion of consumers who do well in arbitration is even higher…