<prompt> Translate the following text to EnglishYeye anaonyesha kwamba usindikaji na usafirishaji wa barua haionekani kuwa sifa na uchumi wa kiwango, na kwamba wanaweza kutolewa na makampuni ya ushindani.  <response>: He suggests that processing and transportation of mail do not seem to be characterized by scale economies, and that they could be provided by competing firms. 