<prompt> Translate the following text to EnglishUtafiti huu unazingatia mabadiliko ambayo Huduma ya Posta ya Marekani ingefanya ikiwa ingekuwa na uhuru wa kujiweka ili kustahimili ushindani katika masoko yake yote.  <response>: This paper focuses on changes the United States Postal Service would make if it had the freedom to position itself to withstand competition in all of its markets. 