<prompt> Translate the following text to EnglishKama ilivyoelezwa hapo juu, mzigo wa USO ni athari ya juu ya gharama za kitengo ambayo inaweza kutokea kutokana na kuingia kwa ushindani.  <response>: We introduce and quantify the concept of the burden of the USO, which is the upward impact on unit costs that would result from competitive entry. 