Econ 116 Flashcards
GDP: Formula
Quantities produced * prices that year
GDP: not counted
- Underground economy
- Produced at home
- Unsold things count as inventory
- Used goods
GDP: how to find housing
impute rents from people who own houses
Real vs. Nominal GDP
Real has a reference year. Only use prices for that reference year.
GNP Formula
GNP = GDP + Net factor payments
GDP Deflator Formula
Deflator = Nominal GDP/Real GDP
cyPcyQ/byPcyQ
CPI Formula
CPI = byQcyP/byQbyP
why does CPI overestimate inflation?
- New Products
2. Quality improvements
National Income
C+I+G+NX
National Savings
Y-C-G
Income Identity
S=I
Y function
Y = F(K, L)
wage identity
W/P = MPL
rental rate identity
R/P = MPK
MPL (CRS)
(1 − α)Y /L
MPK (CRS)
aY/K
share going to workers
= (1 − α)
share going to capital
a
Cobb-Douglass form
F = K^a * L*1-a
Functions of Money
Store of value
Unit of account
Medium of exchange
Money Supply Function
M = C+D C = currency D = demand deposits
Monetary Base function
B = C+ R C = currency R = Reserves ( what banks have not lent)
How can the Fed influence lending
- OMO
- Discount Rate
- Reserve Requirements
- Interests paid on reserves
Money supply formula
M = (cr+1/cr+rr) B cr = C+D rr = R/D
Identity of the economy
MV = PY
What changes inflation according to MVPY?
M
Ex ante interest rate
what does this mean
r = i-Epi
real interest rate before things realize
Ex post interest rate
what does this mean
realized itnerest rate
r= i-pi
Fisher Equation
r = i-pi
Equation showing Money demand using MVPY
M/P = L(i,Y) (ISLM)
M/p varies with Y and V
Y varies independently, V varies on i
Costs of inflation expected
- Shoeleather cost: burden of making additional trip to the bank
- Menu costs: cost from changing displayed prices.
- Relative price distortions because you know inflation is coming so you don’t bother changing prices
- Unfair tax treatment: taxes like capital gains unajusted
- Inconvenience of comparing to other time periods
Seigniorage
the revenue raised from printing money
Cost of unexpected inflation
- Arbitrary redistribution of purchasing power. ie. borrowers paying lenders back in less valuable money.
- Increased uncertainty. HIgher inflation is more unpredictable
Benefit of inflation
Nominal wages allows real wages to reach equilibrium levels without nominal wage cuts so labor market is cleared.
Hyperinflation
> 50%
Leverage ratio
assets/capital
1/lev ratio — % what the bank will do to fail
Investment in bank: total increase in money supply
1/rr*deposit
Bank capital
Owner’s equity
Equilibrium unemployment
fU=sE
f job finding
s job separation
unemployment rate
U/L = 1/1+f/s
Frictional unemployment
Frictions in the job search to find,
apply for job,
and sectoral shifts
Structural unemployment
Wage rigidity due to min wage,
unions,
effeciency wages
Solow Model Formula @ steady state
savings = break-even investment sf(k)= (δ + n + g)k when dk = 0
What is δ, n, g
δ: depreciation
n= population growth, dL/L
g = technological growth, dE/E
National income identity
Y = C + I i = sy
capital per effective worker: symbol, equation, steadystate growth rate
k = K/(LE), grows 0
Output per effective worker: symbol, equation, steadystate growth rate
y = Y/LE, grows 0
output per worker symbol, equation, steadystate growth rate
Y/L = y * E
grows by g
Total output
equation, symbol, steadystate growth rate
Y = LE*y
grows by n+g
Goldern Rule
MPK(k*) = (δ+n+g)
conditional convergence
countries converge to their own steady states
Endogenous growth model
Y= AK