<prompt> Translate the following text to SwahiliThe exponent of Pb in Equation 1, then, is not a traditional elasticity; rather, it is an elasticity for changes in own-price when the discount remains unchanged, referred to in this paper as a no-shift elasticity.  <response>: Pb katika equation 1 ni elasticity ya kawaida, badala yake, ni elasticity kwa mabadiliko katika bei ya mwenyewe wakati discount inabaki unchanged, inajulikana katika karatasi hii kama elasticity no-shift. 