THE REVISIONS WERE PROPOSED BY THE U.S. DEPARTMENT OF JUSTICE'S OFFICE FOR IMPROVEMENTS IN THE ADMINISTRATION OF JUSTICE. IN THE FIRST STUDY, PLAINTIFF LAWYERS IN SECURITIES, TRUTH IN LENDING, AND ANTITRUST ACTIONS WERE SURVEYED TO DETERMINE THE RESOURCES REQUIRED FOR FEDERAL AND STATE GOVERNMENTS TO TAKE A GREATER ROLE IN THE LITIGATION OF MASS SMALL CLAIMS ACTIONS, AS PROPOSED. ASSUMING THE WORST-CASE INCREMENTAL WORKLOAD, THE PROPOSED RULE CHANGE WOULD HAVE AN INCREMENTAL COST OF 260 ATTORNEY YEARS OR $15.25 MILLION. IN THE FOURTH YEAR AND SUCCEEDING YEARS, THE INCREMENTAL COST COULD BE $61 MILLION. DETERMINATION OF ULTIMATE INCREMENTAL COST IS IMPOSSIBLE, HOWEVER. ALSO, THE FIRST STUDY CONCLUDED THAT ESTIMATED COSTS TO THE U.S. JUSTICE DEPARTMENT WOULD BE A MAXIMUM OF $2.8 MILLION PER YEAR, AND THAT ABOUT ONE-THIRD OF ALL CASES OF INTEREST ARE BROUGHT BY BUSINESSES. THE SECOND STUDY WAS DESIGNED TO ESTIMATE THE PROPOSED REFORM'S IMPACT ON SMALL BUSINESSES. RESULTS INDICATED THAT SMALL BUSINESSES ARE ALMOST ALWAYS INVOLVED ON THE PLAINTIFF SIDE OF CLASS ACTION DAMAGE SUITS AND THAT THEIR TOTAL FINANCIAL RECOVERIES EXCEEDED TOTAL PAYMENTS BY A FACTOR OF OVER 60 FOR ALL CASES AND BY A FACTOR OF 2.3 IN SMALLER DAMAGE CASES. IN THE THIRD STUDY, UNCLAIMED RECOVERIES RETURNED TO THE GOVERNMENT WERE ESTIMATED. USING DIFFERENT ASSUMPTIONS FOR SECURITIES AND ANTITRUST LITIGATION, GROSS AMOUNTS RANGED FROM $10.1 MILLION TO $74.8 MILLION. FOOTNOTES, TABLES, AND APPENDIXES LISTING CASE CITATIONS FOR LARGE AND SMALL ANTITRUST ACTIONS AND PRESENTING ADDITIONAL DATA ARE INCLUDED. (CFW)