Tsis ntev los no, koj tuaj yeem pom qhov hloov pauv tsis tu ncua ntawm tus nqi rau cov khoom siv. Feem ntau cov kev hloov no tshwm sim nyob rau hauv ib tug complex yam. Lawv zoo ib yam li lub tsev uas tawg, ib qho poob ua rau lwm tus.
Ntawm qhov tod tes, nws tuaj yeem pom tias tib neeg cov nyiaj tau los tsis hloov pauv raws li tus nqi ntawm cov khoom thiab cov kev pabcuam nce. Tau kawg, cov nyiaj tau los kuj tseem loj hlob, tab sis tus nqi ntawm lawv txoj kev loj hlob feem ntau qis dua tus nqi ntawm tus nqi loj hlob. Muaj qee qhov kev sib raug zoo ntawm tus nqi hloov pauv rau ib yam khoom thiab kev thov rau lwm tus. Qhov taw qhia uas qhia txog qhov kev sib raug zoo no hu ua cross elasticity.
Definition
Yog tias peb tham txog elasticity feem ntau, ces peb tuaj yeem hais tau yooj yim tias nws qhia qhov piv ntawm cov kev hloov pauv hauv cov ntsuas sib txawv. Elasticity tuaj yeem siv rau hauv thaj chaw ntawm cov nyiaj tau los, kev thov, khoom siv. Ua tsaug rau qhov elasticity Performance index, nws muaj peev xwm kwv yees li cas qhov kev thov rau cov khoom yuav hloov thaum nws tus nqi nce, piv txwv li, los ntawm kaum feem pua. Los yog, hais, cov nyiaj tau los elasticity qhia tau hais tias qhov kev thov rau ib yam khoom yuav hloov pauv li cas nrog kev hloov pauv ntawm cov neeg siv khoom.
Cross elasticity yog tus coefficient uas qhia txog kev sib raug zoo ntawm tus nqi ntawm ib yam khoom thiab qhov kev thov rau lwm tus. Qhov ntsuas no tuaj yeem yog qhov zoo, tsis zoo lossis xoom. Yog hais tias tus ntoo khaub lig elasticity muaj ib tug ntxiv kos npe rau, ces peb yuav tham txog cov ntaub ntawv ntawm kev sib piv ntawm interchangeable khoom. Hauv qhov no, qhov kev hloov pauv ntawm tus nqi ntawm ib qho zoo inversely cuam tshuam qhov kev hloov ntawm kev thov rau lwm tus.
Negative elasticity yog ib qho zoo rau cov khoom ntxiv lossis cov khoom ntxiv. Nyob rau hauv cov ntaub ntawv no, tus cawv yog proportional rau cov kev hloov, thiab raws li tus nqi ntawm ib yam khoom nce, theem ntawm kev thov rau lwm tus txo.
Zero cross-elasticity qhia tias cov khoom tsis cuam tshuam rau ib leeg los ntawm ib qho twg. Hauv qhov no, kev hloov pauv ntawm qib kev thov lossis tus nqi ntawm ib yam khoom yuav tsis ua rau muaj kev hloov pauv ntawm lwm qhov ntsuas.
Daim Ntawv Thov Lub Neej
Tau kawg, cov lus nug tshwm sim: "Yuav ua li cas tus neeg yooj yim yam tsis muaj kev kawm nyiaj txiag siv qhov kev paub no hauv nws lub neej?". Cov lus teb yog qhov yooj yim heev, tab sis nws yog qhov zoo dua los piav nws nrog piv txwv. Yog li, nrog rau kev nce nqi roj, qhov kev thov rau lwm qhov chaw siv hluav taws xob nce, uas ua rau lawv qhov tseem ceeb thiab muaj txiaj ntsig hauv qhov muag ntawm cov neeg siv khoom muaj peev xwm. Thiab tom qab ntawd, tus nqi tiag tiag ntawm cov peev txheej no yuav nce ntxiv. Yav dhau los, tsis muaj leej twg coj lub tswv yim ntawm lub tsheb hluav taws xob tiag tiag, tab sis sai li sai tau thaum cov nqi roj pib nce siab, "lub hwj chim uas yuav" tau pom muaj kev txaus siab tiag tiag hauv cheeb tsam no. Raws li qhov no, tus nqilub tswv yim nws tus kheej, nrog rau nws cov derivatives, nce ntau (vim xav tau ntau ntxiv).
Cross-elasticity yog ib qho cuab yeej siv tau zoo rau kev tshuaj xyuas cov neeg siv khoom lag luam, tab sis ib tus tsis tuaj yeem tsis quav ntsej txog cov khoom uas muaj. Piv txwv li, qeb ntawm khoom kim heev yog yuav luag tsis yooj yim sua rau kev ntsuam xyuas ntawm elasticity.
