<prompt> Translate the following text to EnglishSasa sinema zina kiasi fulani cha nguvu ya udhibiti siku moja, mtazamaji wa sinema fulani anaweza kuwa na upendeleo mkubwa kwa filamu fulani katika ukumbi fulani, na wanatofautisha bei kwa kutoa punguzo kwa wananchi wazee ambayo ni sawa na kutofautisha kila mtu chini ya umri wa miaka 65.  <response>: Movie theaters have a certain amount of monopoly power on a given night, a given moviegoer is likely to have a strong preference for a particular movie at a particular theater, and they price discriminate by offering discounts to senior citizens which is equivalent to discriminating against everybody under the age of 65. 