think persue mph in usa as a second degree only which means if u have to do phd or md in usa or similar thing..or some agency is funding u to do mpd with full scholarship..n u intend to return back home country after study ...it dosenot have a good market scope except some research assistant positions .. it can take upto 40K to complete 2 year degree at your own cost in average university..some offer 1 year mph too...but most schoop provide scholarship ...if u ask me never good idea to study with ur own cost koz returen is too low..other major with similar investment gives mu much return n better job