【MIT公开课】14.01 微观经济学原理 · 2018年秋（完结 · 中...
【前面四节课笔记】
https://b23.tv/hZuEEsj
https://b23.tv/u2f0o2d
https://b23.tv/O0PKWXC
I. Production Function
Producer有⬆️ Supply Curve
Goal: maximize profits （不是maximize output）
Profit=R-C q = f (L,K)
降低C（提高效率） q是市场上的
Input: labor capital
看是fixed还是variable
SR(short run仅一个变量 Labor-variable capital-fixed
还是LR(Long run Everything is variable
Fixed inputs--hard to exchange quickly
CAPITAL
Building Machines
Stuff that workers use to make things
II. Short-run Production
Labour-variable Capital-fixed
Production Function: q=f(L, k的bar)
Decision: how many, how long hours they work
Bottom line: amount of labor being provided
Factor: Marginal Product of Labor
q=L+K
Leantieff Production Function
Slope Isoquants
Slope of the indifference curve of the marginal rate of substitution
MRTS：Marginal rate of technical substitution=slope of the Isoquant=Delta k over Delta L
Slope of Indifference curve varies along the Isoquant
⬆️Production function⬇️
1.A（one worker four machines）A到B
at A second worker is very productive (2machine
(diminishing marginal products)
not perfectly Leontieff, can get the intuition
second worker is same as the first (same off)
have same Isoquant
Marginal rate of technical substitution is -2➡️substitutes for two machines
one worker substitutes for two machines
B to C MRTS＝-1/2
Two workers substitute for one machine
等于0 因为都是Isoquant
MRTS为负数的原因⬆️⬇️（图和时间轴）
not freely Invertible
Leontieff
can be negative infinity-∞ or positive infinity ∞+ or 0
if constant, that is a line(Substitutable inputs)MRS（marginal rate of substitution)constant linear
Return to scale（Baseline）
CRS: Constant Returns to scale production function
IRS: Increasing returns to scale where doubling inputs ➡️more than＞ double
DRS: ＜
后面继续更新… 截止到
2021/12/25 21：30更新至P5 05：19
2022/02/22 22：52更新至P5 08：49
2022/02/23 18：06更新至P5 11：32
