Kev thov yog ib qho ntawm cov ntsiab lus tseem ceeb hauv kev lag luam. Nws nyob ntawm ntau yam: tus nqi ntawm cov khoom lag luam, cov nyiaj tau los ntawm cov neeg siv khoom, muaj cov khoom hloov pauv, qhov zoo ntawm cov khoom thiab lub qab nyiam ntawm cov neeg yuav khoom. Qhov kev sib raug zoo tshaj plaws tau pom ntawm kev thov thiab qib theem. Tus nqi elasticity ntawm kev xav tau qhia pom tias cov neeg siv khoom xav tau hloov pauv ntau npaum li cas thaum tus nqi nce (tsawg dua) 1 feem pua.
Cov Lus Qhia
Kauj ruam 1
Kev txiav txim siab lub elasticity ntawm kev xav tau yog qhov tsim nyog rau kev txiav txim siab txog kev teeb tsa thiab hloov tus nqi rau cov khoom lag luam thiab cov kev pabcuam. Qhov no ua rau nws tuaj yeem nrhiav qhov ua tau zoo tshaj plaws hauv txoj cai tswj hwm kev lag luam hais txog cov txiaj ntsig kev lag luam. Kev siv cov ntaub ntawv ntawm kev ywj pheej ntawm kev thov tso cai rau peb txheeb xyuas cov neeg siv cov tshuaj tiv thaiv, nrog rau kev tsim khoom ncaj qha rau kev hloov pauv tom ntej hauv kev xav tau thiab kho qhov sib koom ua lag luam.
Kauj ruam 2
Tus nqi elasticity ntawm kev thov yog txiav txim siab siv ob coefficients: qhov coefficient ntawm ncaj qha tus nqi elasticity ntawm kev thov thiab qhov coefficient ntawm cross-price elasticity ntawm kev thov.
Kauj ruam 3
Cov coefficient ntawm cov nqi ncaj ncaj ntawm kev thov yog txhais raws li qhov sib piv ntawm qhov hloov pauv ntawm qhov ntim ntawm kev xav tau (hauv kev txheeb ze) rau kev hloov pauv ntawm tus nqi ntawm cov khoom. Cov pa roj carbon monoxide no qhia txog pes tsawg feem pua nce ntxiv (txo qis) thaum tus nqi ntawm cov khoom pauv hloov los ntawm 1 feem pua.
Kauj ruam 4
Lub coefficient ntawm ncaj qha elasticity tuaj yeem nqa ob peb yam txiaj ntsig. Yog tias nws ze rau infinity, tom qab no qhov no qhia tias thaum tus nqi poob qis, qhov kev thov ntawm cov neeg yuav khoom nce los ntawm tus nqi tsis kawg, tab sis thaum tus nqi nce, lawv tau tso tseg txoj kev yuav khoom lawm. Yog tias qhov coefficient ntau tshaj li ib qho, tom qab ntawd qhov nce ntawm qhov kev xav tau tshwm sim ntawm tus nqi nrawm dua li tus nqi poob qis, thiab hloov mus ua lwm yam, kev xav tau tsawg dua ntawm tus nqi sai dua li tus nqi nce. Thaum cov coefficient ntawm ncaj qha elasticity yog tsawg dua ib qho, cov teeb meem rov qab tshwm sim. Yog tias qhov sib tshooj yog sib npaug nrog ib qho, ces qhov kev thov xav tau nce ntawm tus nqi ntxiv thaum tus nqi poob qis. Nrog cov coefficient sib npaug rau xoom, tus nqi ntawm cov khoom tsis muaj kev cuam tshuam rau cov neeg siv khoom xav tau.
Kauj ruam 5
Qhov coefficient ntawm cross-price elasticity ntawm kev thov qhia ntau npaum li cas tus txheeb ze ntim ntawm qhov xav tau ntawm ib qho zoo tau hloov thaum tus nqi hloov pauv 1 feem pua rau lwm qhov zoo.
Kauj Ruam 6
Yog tias qhov coefficient ntau dua li xoom, tom qab ntawd cov khoom lag luam suav tias yog fungible, i.e. qhov nce nqi ntawm ib qho yuav tsis zoo ua rau muaj kev nce ntxiv ntawm kev thov rau lwm tus. Piv txwv li, yog tias tus nqi butter nce siab, qhov kev thov rau cov zaub rog tuaj yeem nce ntxiv.
Kauj Ruam 7
Yog tias tus ntoo khaub lig-elasticity coefficient tsawg dua xoom, tom qab ntawd cov khoom yog kev ua tiav, i.e. nrog rau kev nce nqi ntawm ib qho khoom lag luam, qhov kev thov rau lwm tus tsawg dua. Piv txwv, thaum tus nqi roj av nce siab, qhov kev thov ntawm cov tsheb yuav tsum tau ntog. Yog tias qhov coefficient yog sib npaug rau xoom, cov khoom tau txiav txim siab ywj pheej, i.e. qhov kev hloov pauv zoo tshaj plaws ntawm tus nqi ntawm ib qhov zoo tsis muaj kev cuam tshuam qhov kev thov rau lwm tus.
