<prompt> Translate the following text to SwahiliEconomic valuation of benefits often involves estimation of the willingness-to-pay of individuals to avoid harmful health or environmental effects.  <response>: Thamani ya kiuchumi ya faida mara nyingi inahusisha makadirio ya utayari wa kulipa wa watu binafsi ili kuepuka athari mbaya kwa afya au mazingira. 