<prompt> Translate the following text to SwahiliAmong other things, someone was bound to notice that the interaction between increasing returns and product differentiation could help explain some puzzles about international trade--like why most trade is between seemingly similar countries.  <response>: Miongoni mwa mambo mengine, mtu alikuwa na wajibu wa kuona kwamba mwingiliano kati ya kuongezeka kwa mapato na tofauti ya bidhaa inaweza kusaidia kueleza baadhi ya puzzles kuhusu biashara ya kimataifa - kama kwa nini biashara zaidi ni kati ya nchi inaonekana sawa. 