financial frictions, asset prices, and the great recessionvr0j/slides/vzuhouston.pdf · financial...
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Financial Frictions, Asset Prices, and theGreat Recession
Zhen Huo and Jose-Vıctor Rıos-Rull
New York University, University of Pennsylvania, UCL, CAERP
University of Houston
Monday 4th April, 2016
First Version April 2013
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We have had a Great Recession
• Both in the U.S. and in (mostly Southern) Europe
Large decline in output, employment, consumption, and investment.
Households deleveraging process: private debt and housing pricesplunged.
Total factor productivity (TFP) dropped.
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Facts on the last recession: output, unemp, cons, inv
2002 2004 2006 2008 2010 2012 2014 2016−8
−6
−4
−2
0
2
4
6
8
Real output
2002 2004 2006 2008 2010 2012 2014 20164
5
6
7
8
9
10
Unemployment rate
2002 2004 2006 2008 2010 2012 2014 2016−10
−8
−6
−4
−2
0
2
4
6
8
Consumption
2002 2004 2006 2008 2010 2012 2014 2016−40
−30
−20
−10
0
10
20
30
Investment
Note: Except for unemployment, figures show percentage deviation from a linear trend.
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Facts on the last recession: wealth, mortg, houses, pr h
2002 2004 2006 2008 2010 2012 2014 20163.8
4
4.2
4.4
4.6
4.8
5
Net worth to output
2002 2004 2006 2008 2010 2012 2014 20160.5
0.55
0.6
0.65
0.7
0.75
Mortgage debt to output
2002 2004 2006 2008 2010 2012 2014 20161.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
Housing value to output
2002 2004 2006 2008 2010 2012 2014 2016150
160
170
180
190
200
210
220
230
Housing price index
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Facts on the last recession: productivity and labor quality
2002 2004 2006 2008 2010 2012 2014 2016−4
−3
−2
−1
0
1
2
3
4
5
6
TFP: measured with total hours
2002 2004 2006 2008 2010 2012 2014 2016−8
−6
−4
−2
0
2
4
6
Labor productivity
2002 2004 2006 2008 2010 2012 2014 2016−1
−0.8
−0.6
−0.4
−0.2
0
0.2
0.4
0.6
0.8
Labor force quality
2009 2010 2011 2012 2013 2014 2015−4.5
−4
−3.5
−3
−2.5
−2
−1.5
−1
−0.5
0
0.5
TFP: measured with total hoursTFP: measured with total labor inputs
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Culprit: Financial Shocks?
When looking for triggers of the Great Recession some form offinancial breakdown comes out in most popular explanations.
Financing difficulties contribute to cut spending both of firms andhouseholds.
Most of the action occurs via a demand reduction.
Yet models have a hard time to deliver this.
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This paper
Explores recessions that are triggered by shocks to households’ abilityto borrow.
What are the theoretical elements needed
In the context of a modern macro model
Production with Savings [Eggertsson and Krugman(2011)], [Rendahl(2012)]
A lot of wealth [Guerrieri and Lorenzoni(2009)]
Heterogeneity so that the financial frictions are not imposed[Midrigan and Philippon(2011)], [Guerrieri and Iacoviello(2013)] .
What are the quantitative importance of the elements needed
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Findings: The answer is yes, provided there are (from +to-)
1 Real frictions that difficult the switch from production of consumptiongoods to exports or investment.
2 Houses which are inferior goods and not wanted by the super-rich.
3 Frictions in the goods markets that generate movements in measuredGDP.
4 Households that differ in job prospects.
5 Some labor market frictions that limit wage adjustments.
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Findings: The Recession that we generate
• Shares most of the features of the Great Recession:
1 A large decline in output, employment, consumption and investment.
2 Large reductions in assets (housing and stocks) prices.
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Model
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The Model Characteristics: Steady State
Enhanced Aiyagari Economy:
1 Multisector: Tradables and nontradables.
2 Houses (land) that need to be purchased to be enjoyed.
3 Endogenous productivity movements (frictions in goods markets).
4 Various job market frictions.
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Households: Preferences
Continuum of households that live forever (β), are subject touninsurable idiosyncratic.
H’holds care about quantities and number of varieties of nontradables.
cN =
(∫ IN
0
c1ρ
Ni di
)ρ= cNi IρN
Households have to search for varieties, its number is a choice.
IN = d Ψd(Qg)
Ψd(Qg): Probability (per search unit) of finding a variety (goods marketfrictions).
Households also like tradables and housing and dislike goods searching
u [cA(cN IρN , cT ), h, d]
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Households: Endowments and Wealth
Household skill type is ε, follows a Markov chain Γε,ε′ . Moves slowlyand accommodates opportunities to get rich.
Households either have a job e = 1 or not e = 0.
Type-dependent exogenous job destruction rate δεn.
Job finding rate is type independent and depends on job creation byfirms (workers are rationed, it is like no matching function in labormarket but hiring costs) ([Fang and Nie(2013)] ).
Households have assets a. These assets can be allocated to(frictionless) houses and/or to financial assets with a collateralconstraint. The poor will have some housing wealth and a mortgage,the rich houses and shares of the economy’s mutual fund.
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Goods markets
Search frictions in the markets for nontradables:
Households look for varieties.
Random search.
Richer people consume and search more.
Cuts in consumption cut search which cuts productivity.
Perfect competition and frictionless markets for tradables.
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Labor market
Workers are rationed.
Firms hire as many workers as they wish paying hiring costs. (like avacancy filling probability of 1, with hiring costs).
Employment: N = NN +NT .
Same job finding probability across types: Φe = V1−N .
Wages are exogenous (set to some aggregate target).
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Assets markets: Financial assets and houses
Total housing H is in fixed supply.
Negative financial assets (b′ < 0) are (undefaultable) mortgages.
Its interest rate is predetermined: 11+r∗ − ς, if b < 0.
Mortgages have to be collateralized by housing: if b < 0 then
|b| ≤ [1− λ] ph h
[1
1 + r∗− ς]
Positive financial assets (b > 0) are shares of a mutual fund.
Its return, r, is determined ex-post (it matters when we hit the economywith shocks). Possible capital gains and loses.
R(b) =
1 + r, if b ≥ 01, if b < 0.
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Households’ problem
V (ε, e, a) = maxcN,i,cT ,IN ,h,d
u(cA, h, d)+
β∑ε′,e′,θ′
Πθθ,θ′ Π
we′|e,ε Πε
ε,ε′ V [ε′, e′, a′(b, h)] s.t.
∫ IN
0
picN,i + cT + phh+ b = a+ 1e=1wε+ 1e=0 w BC
a′(b, h) = phh+R(b)b AA
b ≥ −λ ph h[
1
1 + r∗− ς
]FC
IN = d Ψd[Qg] SC
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Nontradables: Monopolistic Competition by Varieties
Each firm/variety has any locations each.
Some inputs are location specific. Others (type 2 labor) are not.
Prices are posted before location is filled
The demand function is given by
Ψf [Qg]
∫c[pi(ε, e, a), x] d(x, S)
The firm has to make sure that it can satisfy the demand at alllocations.
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Nontradable firms’ problem
ΩN (k, n) = maxi,v,pi`1,`2
Ψf [Qg]pi
∫c(pi, ε, e, a) dx− w`− i− κv
+∑θ′
Πθθ,θ′
ΩN (k′, n′)
1 + r∗
subject to
`2 ≥ Ψf [Qg]
∫f `[c(pi, x), k, `1]
d(x, S)
DDC
`1 + `2 = nε SL
k′ = (1 − δk)k + i− φN (k, i) LMK
n′ = [1 − δn]n+ v LML
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Tradable firms’ are competitive and have adjustment costs
• Its output is used for exports, investment, and (part of) consumption.• Decreasing returns.
ΩT (k, n) = maxi,v
FT (k, `) − w`− i− κv − φT,n(n′, n)
+∑θ′
Πθθ,θ′
ΩT (k′, n′)
1 + r∗
subject to
k′ = (1 − δk)k + i− φT,k(k, i)
` = nε
n′ = [1 − δn]n+ v
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Mutual fund
Financial wealth in the economy is
L+ =
∫b>0
b(ε, e, a) dx
Mortgages in the economy are
L− =
∫b<0
−b(ε, e, a) dx
Net foreign asset position of the country (the mutual fund owns allfirms)
B = L+ −(
ΩN − πN + ΩT − πT +1
1 + r∗L−
)The realized rate of return is
1 + r =ΩN + ΩT + (1 + r∗)B + L−
L+
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EquilibriumAn equilibrium is a set of decision rules and values for households, firms’values and decision rules, and a set aggregate variables of aggregatestates, such that:
Households’ and firms’ policy functions and value functions solve thecorresponding program problems.
Aggregate searching consistence
D =
∫d(ε, e, a) dx,
Nontradable prices satisfies
p = pi(KN , NN ) dx,
Housing market clears ∫h(ε, e, a) dx = H.
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Equilibrium
Average separation probability and labor force quality
δn =
∑ε δn(ε)n(ε)
N, ε =
∑ε εn(ε)
N
Rate of return to the mutual fund satisfies
1 + r =ΩN + ΩT + (1 + r∗)B +
∫b<0
b(x)∫b>0
b(x)
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The Financial Shocks
We now pose simultaneous shocks to the Financial system: Both to
1 Loan to value ratio. λ
2 Markup on loans ζ
Two options to solve for out of steady State
1 MIT shocks. A surprise and track the transition to a new steady State
2 Pose a known stochastic process and solve it via a Krusell-Smith typemethod.
We do the first.
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Solve for the transition
We have to take care of wages dynamics.They are determined via the following formula
logw − logw = εw(logY − logY
)
It simplifies things.[Gornemann, Kuester, and Nakajima(2012)].
We have to take care of solving for the transition which implies solvingfor sequences for home prices, wages, nontradable prices.
We assume the transition is completed in T periods.
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Mapping the Model to Data
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Functional forms
Preferences
u(cA, h, d) =1
1 − σc
(cA − ξd
d1+γ
1 + γ
)1−σc+ v(h)
where there is an Armington aggregator for consumption
cA =
[ω (cN IρN )
η−1η + (1 − ω)c
η−1η
T
] ηη−1
and houses are inferior goods as a proxy for segmentation of housingmarkets
v(h) =
ξh log(h), if h < h1ξh
1−σhh1−σh , if h1 ≤ h ≤ h2.
ξh√h− h, if h > h2.
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Housing Utility Function
Housing utility function Engel Curve: consumption vs housing
0 1 2 3 4 5−1.2
−1
−0.8
−0.6
−0.4
−0.2
0
0.2
0.4
Housing
Housingutility
1 2 3 4 5 6 7 82.5
3
3.5
4
4.5
5
Consumption
Housing
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Functional forms
Production function
FN (k, `1, `2) = zN kα0 `α11 `α2
2 , FT (k, `) = zT kθ0`θ1
Capital adjustment cost in the nontradable goods sector
φN (i, k) =ψ
2
(i
k− δk
)2
k
Capital and employment adjustment cost in the tradable goods sector
φT,k(i, k) =ψ
2
(i
k− δk
)2
k, φT,n(n′, n) =ψ
2
(n′
n− 1
)2
n
Matching technology
M(D,T ) = νDµT 1−µ
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Exogenously determined parameters
Parameter Value
Risk aversion for consumption, σc 2.0
Satiation level for housing, h 5.0
Curvature of shopping, γ 1.5
Elasticity of substitution bw tradables and nontradables, η 0.80
Price markup, ρ 1.1
Loan to value ratio, λ 0.80
Interest rate for international bonds, r∗ 4%
Note: model period is half a quarter
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Endogenously determined parameters: aggregateTarget Value Parameter Value
Wealth to output ratio 4.00 β 0.97
Housing value to output ratio 1.70 ξh 0.54
Debt to output ratio 0.40 ε4 37.41
Fraction of housing held by bottom 70% 0.25 h1 1.48
Fraction of housing held by bottom 80% 0.39 h2 4.22
Fraction of housing held by bottom 90% 0.58 σh 2.92
Share of tradables 0.30 ω 0.98
Occupancy Rate 0.81 ν 0.81
Capital to output ratio 2.00 δk 0.01
Labor Share in nontradables 0.64 α0 0.27
α1 = α2 —— α1 0.36
Labor Share in tradables 0.66 θ1 0.66
Vacancy cost to output ratio 0.02 κ 0.42
Home production to lowest earning ratio 0.50 w 0.07
Units Parameters
Output 1 zN 0.93
Relative price of nontradables 1 zT 0.48
Market tightness in goods markets 1 ξd 0.03
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Endogenously determined parameters: cross-section Lorenz
Target Value Parameter Value
Job duration for type 1 1.5 year δ1n 0.083
Job duration for type 3 5 year δ3n 0.025
Job duration for type 4 5 year δ4n 0.025
Unemployment rate 6% δ2n 0.048
Wealth Gini index 0.82 Πε1,4 0.0007
Earnings Gini index 0.64 Πε4,1 0.0058
Earning autocorrelation 0.91 Πε1,1 0.9656
Earning stdev 0.20 Πε2,2 0.9770
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Lorenz Curve Return
Networth Housing
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
ModelData
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
ModelData
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Dynamic Parameter I
Real wage rule: log wtPt− log w
P= ϕw
(log Y ∗
t − log Y)
Choose ϕw = 0.55: match correlation between real output and real wage
Consistent with the movement during the Great Recession
2002 2004 2006 2008 2010 2012 2014−8
−6
−4
−2
0
2
4
6
8
Real outputReal wageApprox wage: ϕw = 0.30Approx wage: ϕw = 0.55Approx wage: ϕw = 0.80
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Dynamic Parameter II
Summary of Dynamic Parameters
Parameter Value Target
Adjustment cost, ψ 1.60 Decrease in investment: 30%
DRS in tradables, θ0 0.21 Increase in tradable sector: 4%
Goods market matching elasticity in, µ 0.80 Decrease in TFP: 1.5%
Wage elasticity, ϕw 0.55 Ratio of wage to output change: 0.55
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Experiments: once and for all set of surprises
1 Baseline
Over three months the down payment changes from 20% to 40%
The borrowing interest rate’s surcharge goes from zero to 0.5%
2 Decomposition: with only down payment or interest rate change
3 Role of asset price: constant housing price
4 Role of frictions: wage elasticity, matching frictions and adj costs
5 Allowing default: a larger drop of housing price
6 Credit cycle
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Long Run Properties
• Typically like in all [Aiyagari(1994)] - [Bewley(1986)] -[Huggett(1993)] - [Imrohoroglu(1989)] type models, in the long runoutput and wealth end up being higher.
• But in our economies the transition is associated to a recession.
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Experiment 1: Baseline
0 1 2 3 4 5 6 7 8 9 10−3.5
−3
−2.5
−2
−1.5
−1
−0.5
0
Baseline
Real output
0 1 2 3 4 5 6 7 8 9 106
6.5
7
7.5
8
8.5
9
Baseline
Unemployment
0 1 2 3 4 5 6 7 8 9 10−7
−6
−5
−4
−3
−2
−1
0
Baseline
Consumption
0 1 2 3 4 5 6 7 8 9 10−30
−25
−20
−15
−10
−5
0
5
Baseline
Investment
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Experiment 1: Baseline
0 1 2 3 4 5 6 7 8 9 10−8
−7
−6
−5
−4
−3
−2
−1
0
Baseline
Wealth
0 1 2 3 4 5 6 7 8 9 10−35
−30
−25
−20
−15
−10
−5
0
Baseline
Debt
0 1 2 3 4 5 6 7 8 9 10−18
−16
−14
−12
−10
−8
−6
−4
−2
0
Baseline
Housing price
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Experiment 1: Baseline
0 1 2 3 4 5 6 7 8 9 10−1.5
−1
−0.5
0
Baseline
TFP with total hours
0 1 2 3 4 5 6 7 8 9 10−1.5
−1
−0.5
0
Baseline
Labor Productivity
0 1 2 3 4 5 6 7 8 9 100
0.2
0.4
0.6
0.8
1
1.2
1.4
Baseline
Labor quality
0 1 2 3 4 5 6 7 8 9 10−2.5
−2
−1.5
−1
−0.5
0
Baseline
TFP with total labor inputs
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Experiment 2 : Only λ or r Change
0 1 2 3 4 5 6 7 8 9 10−3.5
−3
−2.5
−2
−1.5
−1
−0.5
0
BaselineOnly λ changeOnly r change
0 1 2 3 4 5 6 7 8 9 106
6.5
7
7.5
8
8.5
9
BaselineOnly λ changeOnly r change
Real output Unemployment rate
0 1 2 3 4 5 6 7 8 9 10−1.6
−1.4
−1.2
−1
−0.8
−0.6
−0.4
−0.2
0
0.2
BaselineOnly λ changeOnly r change
0 1 2 3 4 5 6 7 8 9 10−18
−16
−14
−12
−10
−8
−6
−4
−2
0
BaselineOnly λ changeOnly r change
TFP Housing price
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Experiment 3: with Constant Housing Price
0 1 2 3 4 5 6 7 8 9 10−3.5
−3
−2.5
−2
−1.5
−1
−0.5
0
0.5
BaselineConstant housing price
0 1 2 3 4 5 6 7 8 9 105.5
6
6.5
7
7.5
8
8.5
9
BaselineConstant housing price
Real output Unemployment rate
0 1 2 3 4 5 6 7 8 9 10−1.6
−1.4
−1.2
−1
−0.8
−0.6
−0.4
−0.2
0
0.2
BaselineConstant housing price
0 1 2 3 4 5 6 7 8 9 10−18
−16
−14
−12
−10
−8
−6
−4
−2
0
BaselineConstant housing price
TFP Housing price
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Experiment 4.1: Wage Elasticity
0 1 2 3 4 5 6 7 8 9 10−3.5
−3
−2.5
−2
−1.5
−1
−0.5
0
BaselineHigh wage elasticity: ϕw = 1.0
0 1 2 3 4 5 6 7 8 9 106
6.5
7
7.5
8
8.5
9
BaselineHigh wage elasticity: ϕw = 1.0
Real output Unemployment rate
0 1 2 3 4 5 6 7 8 9 10−1.6
−1.4
−1.2
−1
−0.8
−0.6
−0.4
−0.2
0
BaselineHigh wage elasticity: ϕw = 1.0
0 1 2 3 4 5 6 7 8 9 10−18
−16
−14
−12
−10
−8
−6
−4
−2
0
BaselineHigh wage elasticity: ϕw = 1.0
TFP Housing price
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Experiment 4.2: Adjustment Cost
0 1 2 3 4 5 6 7 8 9 10−3.5
−3
−2.5
−2
−1.5
−1
−0.5
0
BaselineLow adjustment cost
0 1 2 3 4 5 6 7 8 9 106
6.5
7
7.5
8
8.5
9
BaselineLow adjustment cost
Real output Unemployment rate
0 1 2 3 4 5 6 7 8 9 10−2
−1.8
−1.6
−1.4
−1.2
−1
−0.8
−0.6
−0.4
−0.2
0
BaselineLow adjustment cost
0 1 2 3 4 5 6 7 8 9 10−18
−16
−14
−12
−10
−8
−6
−4
−2
0
BaselineLow adjustment cost
TFP Housing price
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Experiment 4.3: Goods Market Frictions
0 1 2 3 4 5 6 7 8 9 10−3.5
−3
−2.5
−2
−1.5
−1
−0.5
0
BaselineLow matching elasticity: µ = 0.05
0 1 2 3 4 5 6 7 8 9 106
6.5
7
7.5
8
8.5
9
BaselineLow matching elasticity: µ = 0.05
Real output Unemployment rate
0 1 2 3 4 5 6 7 8 9 10−1.6
−1.4
−1.2
−1
−0.8
−0.6
−0.4
−0.2
0
0.2
0.4
BaselineLow matching elasticity: µ = 0.05
0 1 2 3 4 5 6 7 8 9 10−18
−16
−14
−12
−10
−8
−6
−4
−2
0
BaselineLow matching elasticity: µ = 0.05
TFP Housing price
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Experiment 5: Allowing Households Holding no Housing
30% of households hold zero houses in the United States
Change preference slightly to match this moment
v(h) =
ξh log(h+ h), if h < h1,ξh
1−σh
(h+ ξ1
h
)1−σh + ξ2h, if h1 ≤ h ≤ h2,
ξ3h
√h
2 − (h− h)2 + ξ4h, if h > h2.
Similar aggregate response, but richer cross-sectional implications
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Experiment 5: Aggregate Response
0 1 2 3 4 5 6 7 8 9 10−3.5
−3
−2.5
−2
−1.5
−1
−0.5
0
BaselineExtension: allowing no housing
0 1 2 3 4 5 6 7 8 9 106
6.5
7
7.5
8
8.5
9
BaselineExtension: allowing no housing
Real output Unemployment rate
0 1 2 3 4 5 6 7 8 9 10−1.5
−1
−0.5
0
BaselineExtension: allowing no housing
0 1 2 3 4 5 6 7 8 9 10−20
−18
−16
−14
−12
−10
−8
−6
−4
−2
0
BaselineExtension: allowing no housing
TFP Housing price
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Experiment 5: Cross-Sectional Effects
10 20 30 40 50 60 70 80 90 100−60
−50
−40
−30
−20
−10
0
Wealth
10 20 30 40 50 60 70 80 90 100−16
−14
−12
−10
−8
−6
−4
−2
0
2
4
Consumption
• This agrees with the evidence in [Petev, Pistaferri, and Eksten(2012)] and
[Parker and Vissing-Jorgensen(2009)]
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Experiment 6: Allowing Default
Borrowing interest rate’s surcharge goes from zero to 1%.
Housing price drops more than 20%, and agents may be underwater.
Allow borrowers to default, but savers suffer from the capital loss.
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Experiment 6: Allowing Default
Total saving in financial wealth in the economy is
L+,t =
∫b>0
bt(ε, e, a) dx
Mortgages in the economy are
L−,t =
∫b<0
−bt(ε, e, a) dx
Net foreign asset position of the country
Bt = L+,t −(
ΩNt − πNt + ΩTt − πTt +1
1 + r∗L−,t
)The realized rate of return in next period is
1 + rt+1 =ΩNt+1 + ΩTt+1 + (1 + r∗)Bt
L+
−∫b<0
Iph,t+1ht(ε,e,a)+bt(ε,e,a)>0[ph,t+1ht(ε, e, a) + bt(ε, e, a)] dx
L+
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Experiment 6: Allowing Default
0 1 2 3 4 5 6 7 8 9 10−4.5
−4
−3.5
−3
−2.5
−2
−1.5
−1
−0.5
0
BaselineAllow default
0 1 2 3 4 5 6 7 8 9 106
6.5
7
7.5
8
8.5
9
9.5
10
BaselineAllow default
Real output Unemployment rate
0 1 2 3 4 5 6 7 8 9 10−2.5
−2
−1.5
−1
−0.5
0
BaselineAllow default
0 1 2 3 4 5 6 7 8 9 10−25
−20
−15
−10
−5
0
BaselineAllow default
TFP Housing price
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Experiment 7: Credit Cycle
0 1 2 3 4 5 6 7 8 9 100.55
0.6
0.65
0.7
0.75
0.8
0.85
Loan to value ratio λ
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Experiment 7: Credit Cycle
0 1 2 3 4 5 6 7 8 9 10−2.5
−2
−1.5
−1
−0.5
0
0.5
1
1.5
0 1 2 3 4 5 6 7 8 9 104.5
5
5.5
6
6.5
7
7.5
8
Real output Unemployment rate
0 1 2 3 4 5 6 7 8 9 10−1.2
−1
−0.8
−0.6
−0.4
−0.2
0
0.2
0.4
0.6
0.8
0 1 2 3 4 5 6 7 8 9 10−5
0
5
10
15
20
TFP Housing price
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Conclusions
We have a recession generated purely by increased difficulties toborrow on the part of households
The recession comes together with
TFP loses
Drop in Housing prices (movements too sharp because of lack of housefrictions)
Drop in Stock Market
The literature is trying hard to get this ([Midrigan and Philippon(2011)],
[Guerrieri and Lorenzoni(2009)]) with limited success.
Still ways to go:
Foreclosures; slow housing frictions; Long term Mortgages.
Slow expanding export industries.
Model of banking cycles.
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Thank you very much
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American Time Use Survey Data on Shopping Time
5.2
5.4
5.6
5.8
66.
2
2003 2006 2009 2012Year
Total Shopping Time Trend
1.6
1.8
22.
22.
4
2003 2006 2009 2012Year
Shopping time on services Trend
Total shopping time Shopping time on services
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The working of financial shocks that hit the production side
[Bernanke and Gertler(1989)], [Bernanke, Gertler, and Gilchrist(1999)]
Firms cannot borrow as much.
Not all good projects will be undertaken.
Cash rich firms expand at the expense of cash poor firms.
In fact there is some of this in the data: Since 2007 employment of the young
firms went down by 24.5% and in 2012 it was at the historically lowest level.
Firms make themselves vulnerable by being close to their credit limitto improve their bargaining position over wages[Monacelli, Quadrini, and Trigari(2011)]
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Why was there a financial shock? (what was the trigger?)
Increased variance in the cross-sectional returns of firms [Bloom(2009)],
[Bloom et al.(2011)Bloom, Floetotto, Jaimovich, and Saporta]
[Arellano, Bai, and Kehoe(2012)], [Christiano, Motto, and Rostagno(2014)] [Dyrda(2015)].
Straight shocks to credit constraints [Jermann and Quadrini(2012)],
[Perri and Quadrini(2011)], [Macera(2015)].
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What have we learned
It is hard to get a large recession only from the product side and onlyfrom lower investment.
The largest success (to my knowledge) ([Arellano, Bai, and Kehoe(2012)])
works by having the financial shocks increase the probability of defaultand inducing firms to pursue very conservative use of inputs despitetheir almost normal productivity.
Still it is hard to have a reduction of marginal cash to create a largerecession ([Zetlin-Jones and Shourideh(2012)]).
It may have played a larger role in the expansion of new firms([Dyrda(2015)])
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