Khoom siv: Kev tiv taus ntawm cov khoom thiab kev xav elasticity
Qhov pib Lub luag haujlwm ntawm kev tiv thaiv cov khoom yog txiav txim seb cov zog sab nraud twg ib lub cev khov kho (piv txwv li, ib lub tsev, ib feem qauv, lossis av) tuaj yeem tiv taus. Yuav teb tau lo lus nug no, pib ntawm ob lub ntsiab cai: ntawm ib sab, cov kev ntxhov yuav tsum tsis txhob tshaj qee qhov kev…
Nyeem tsab xov xwm