AL讀"過"ECON 入((新增))

z型仔z

等優曲線圖有咩局限??
另外macro方面
如果我ce math得c會唔會好難應付?

[ 本帖最後由 z型仔z 於 10-8-17 01:51 PM 編輯 ]

jj金

咩黎?
路過

J.辛尼迪

岩岩讀完中6
有無英文..中文睇唔明
雖然英文都唔知係咪明得哂

36661124

concave convex?
9 up only

z型仔z

wt is an indifference curve and an indifference map??
what's the use of them??
why is an indifference curve convex to the origin??
不要背書答案，想要簡單易明既答案

無名光

indifference curve(IC)係一條將你有同等喜好價值既bundle連埋一齊既線
indifference map 係多過1條ic既圖 eg有4-5條ic
what's the use of them??<--自己搵pp 有講
why is an indifference curve convex to the origin?? 如果唔係convex~即係一個人只會買哂1樣物品~而但係現實唔係~現實人會買唔同既物品

神蹟再現

我自己都研究過呢課,但都未必100%岩哂
希望可以幫到你
what's the use of them??
呢到要由功用著手,因為可以分析到d非金錢既野
但都有唔好處,有(+)(-)(0) ie,可以分析到係normal good inferior good,定係giffen good
亦因為咁 最多只可以引出demand curve but not law of demand

why is an indifference curve convex to the origin??
呢題好簡單,因為convex to the origin=邊際替代率遞減定律
係經濟學家假定既,暗示左人們消費係多樣性,大約係咁上下
呢part 你搵書convex to the origin=邊際替代率遞減定律
可以拎9成分

潮文先生

原帖由 z型仔z 於 10-8-16 11:54 PM 發表
等優曲線咩黎?內凸咩黎?
個圖又點睇??

可以參考一下張五常果3 本書

z型仔z

push!!!!!!

◤人生大作戰◢

樓主用中文定英文讀？

z型仔z

原帖由 ◤人生大作戰◢ 於 10-8-17 02:16 PM 發表
樓主用中文定英文讀？

english ....

OHOHYA

原帖由 z型仔z 於 10-8-16 11:54 PM 發表
等優曲線圖有咩局限??
另外macro方面
如果我ce math得c會唔會好難應付?

聽講大學ECON A MATHS勁會神D

快快煒

what is market price?

◤人生大作戰◢

wt is an indifference curve and an indifference map??
what's the use of them??
why is an indifference curve convex to the origin??
---------------------------------------------------------

Indifference curve represents different combinations of two goods that are equally preferable .
[An indifference curve represents combinations of goods of same utility level . The arbitrary number for each curve in order to rank preference is called utility .]

Assuming that we can identify the level of preference for each combination of goods and therefore , we can derive infinite number of indifference curves --- indifference map . We then assign a number to each indifference curve to rank the preference level .

a-level exam 唔會咁問=.=…
我只會咁講：
Indifference Curve Analysis mainly consists of two components：indifference curve and budget line . Indifference curve from the utility , and budget line is the constraint . Based on a limited budget , we try to maximize utility , this is the concept of Indifference Curve Analysis .

1. utility maximization itself is tautological，所以我地就咁講 utility maximization，係無 testable implications。
2. Postulates of Indifference Curve Analysis
I. postulate of substitution
II. postulate of convexity
III. people make consistent choices (=indifference curves do not intersect)
IV. postulate of utility maximization

有左以上 postulates (the behavioural postulates that restrict consumpyion choices)，再引入 constraints (the real-world constraints)，咁就可以引導出 testable implications (examine what implications on consumption choices can be derived the postulates)。

不過，change in constraints (eg.money income、relative price) 會令 behaviour 改變 (即係 testable implications 會改變)。
其中就一個情況，就係發生左"Giffen good"的問題。在此我不詳談 Giffen paradox。不過可以同你講，Giffen good 個 case 無 testable implications 可言。

indifference curve is convex to the origin = DMRS
Postulate of convexity = Postulate of diminishing marginal rate of substitution (DMRS)

通過 Equilibrium with Increasing MRS and Corner Solution 個case，[即 indifference curve is concave to the origin ]
引申出--->specialization in consumption

Increasing MRS只會出現Corner Solution，唔會有 Inerior Solution。
反觀如果係 Decreasing MRS，會有兩個可能：1.Corner Solution 2.Inerior Solution [兩個可能都係indifference curve is convex to the origin]

而通過 Equilibrium with Decreasing MRS and Inerior Solution 個case，
引申出--->diversification in consumption

Therefore , the postulate of convexity is supported by the fact that we do not observe specialization in consumption .

◤人生大作戰◢

圖我唔畫俾你睇，
如果你係用C&K，書都有圖可以睇