<prompt> Translate the following text to EnglishKama elasticities msalaba kuwa kubwa, viwango vya discount ufanisi hoja karibu na ECP ngazi na faida ya ustawi kuhusishwa inapatikana kuwa ndogo sana.  <response>: As the cross elasticities become larger, the efficient discount levels move closer to the ECP level and the associated welfare gains available become quite small. 