<prompt> Translate the following text to EnglishChestnut pia alionyesha kuwa ongezeko la asilimia moja la mapato linahusiana na ongezeko la asilimia 0.9 la WTP kwa mabadiliko yoyote ya kuonekana.  <response>: The benefits estimates here incorporate Chestnuts estimate that a one percent increase in income is associated with a 0.9 percent increase in WTP for a given change in visibility. 