the consumption and wealth effects of an unanticipated change in lifetime resources tullio jappelli...
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The Consumption and Wealth Effects of an Unanticipated Change in
Lifetime Resources
Tullio JappelliUniversità di Napoli Federico II
Mario PadulaUniversità della Svizzera Italiana
The Bank of Italy’s Analysis of Household Finance, December 3-4, 2015
1
The old days
Do people respond to unanticipated changes in resources?
1. Nature of change Fiscal vs. monetary shocks Temporary (tax rebate, bonus) vs. permanent
tax reform Current vs. lifetime resources
2. Nature of response: Consumption, wealth, labor supply, portfolio choice
3. Heterogeneity of responseDue to horizon, liquidity constraints, precuationary saving, behavioral theories
4
Outline
- The reform of severance pay of Italian public employees
- Simulated effect on wealth and consumption.
- Difference-in-difference estimates using SHIW data.
- €1 reduction in severance pay increases wealth-income ratio by 0.32 and reduces consumption-income ratio by 0.03.
5
Permanentshock
Transitoryshock
Anticipatedincrease
Anticipateddecline
Anticipated income changes
Unanticipated income changes
Positive Negative
Large Small
Size
Check in the mail
PayrollCoupons
Context
RecessionAsset liquidity
DebtAge
6
Many MPCs…
Consumption response
Measuring MPC from unanticipated income shocks
To estimate response of consumption to income shocks
1. Write income process (say transitory/permanent decomposition). Then estimate MPCs using restrictions that theory imposes on the var-cov matrix of consumption and income growth residuals.
Hall and Mishkin (1982), Blundell, Pistaferri & Preston (2008)
2. Subjective expectations: how will you spend hypothetical income increase / decrease? Saving, Consumption, Debt.- Don’t need data on consumption or worry about income process.- Can easily look at MPC heterogeneityShapiro & Slemrod (various years), Jappelli & Pistaferri (2014)
3. Natural experimentsGruber (1997), Browning & Crossley (2001), Paxson (1993), Fuchs-Schundeln (2005), Di Maggio et al. (2014), Surico &Trezzi (2015). 7
A permanent income change: reform of severance pay of Italian public
employees Intertemporal model: effect on wealth and
consumption.
Difference-in-difference using SHIW data from 1989-2010.
€1 reduction in severance pay reduces consumption relative to income by 0.03. The wealth-income ratio increases by 0.32. The offset ratio is 0.4.
Young vs old employees, more than 1 public employee
Robustness
Why is the reform interesting?
Vast literature on the effect of transitory shocks on consumption, much less on the effect of permanent shocks.
Some papers look at change in disability (Browning and Crossley, 2001).
Others look at consumption and wealth effects of social security reforms (Attanasio and Brugiavini, 2003; Attanasio and Rohwedder 2003; Bottazzi, Jappelli and Padula, 2006).
We study effect on both wealth and consumption looking at sizable and unanticipated changes in future income.
The severance pay reform In 2000 Italy replaced its traditional system
of severance pay for public employees with a new system.
Old regime: severance pay was proportional to the final wage before retirement.
New regime: proportional to lifetime earnings.
The reform entails substantial losses for future generations of public employees, in the range of €20,000-30,000, depending on seniority.
Contracts
Severance payment
Private employees
All Years of contributions ×0.0691× yearly salary. Contributions are capitalized with accrual rate equal to 0.015+0.75
Public employees Pre-reform
All Years of contributions × 0.80 × (final yearly salary / 12)
Public employees Post-reform
Before 2000 Pro-rata regime, with two components, until and after 2010, with weights given by years of service.
After 2000 Same as private employees
The size of the shock Before the
reform
After the reform
(1)
Contracts signed before
December 2000 (2)
Contracts signed after
December 2000 (3)
g=1.53%, y0=15,800
76,195 69,303 58,065
g=2.23%, y0=18,000
116,517 100,976 77,996
g=2.62%, y0=20,000
146,234 124,342 92,980
Assumptions: 40 years of work; in column (2) contract is signed in 1995; g and y are historical averages for all emplyees
Simulations
In the pre-reform regime, severance pay is:
In the post-reform regime:
Results differ depending on when the reform occurs in the course of the life-cycle.
10.8 NS N Y 1
00.0691 (1 )
N N tt
tS Y
Income process
1 1
0 0
T Nt tt t N
t t
C Y SR R R
1
00
max ( )T
tt
tE U C
1 1 1
1 1
t t t
t t t
Y P VP GPZ
Wealth-income ratio before and after the severance pay reform
Change in the wealth-income ratio
c/y before and after the severance pay reform
Change in c/y
An unanticipated negative income shock to lifetime resourcesreduces consumption and increases wealth relative to income.
Both effects depend on the size of the shock, and are stronger for younger workers.
Data
Pooled 1989-2010 sample from SHIW
Age 20-55, 39% public, 61% private
Exclude self-employed and workers near to retirement.
Wealth-income ratio, by occupation
23
45
6W
ealth
-inco
me
ratio
1990 1995 2000 2005 2010
Public employees Private employees
Consumption-income ratio, by occupation
.7.7
5.8
.85
.9C
onsu
mpt
ion-
inco
me
ratio
1990 1995 2000 2005 2010
Public employees Private employees
Difference-in-difference estimates
y = wealth or consumption-income ratiod>0 in the regression for the wealth-income
ratiod<0 in the regression for the consumption-
income ratio.
Assumptions the reform is exogenous with respect to
consumer decisions; the reform is exogenous with respect to
changes in sample composition (no labor supply response).
it i t i t it ity M POST M POST x d
Baseline estimates Wealth-income ratio Consumption-income
ratio Public employee 0.015 0.002 (0.065) (0.010) Post-reform period 0.772 0.059 (0.063)*** (0.009)*** Public employee post-reform 0.321 -0.030 (0.101)*** (0.015)** Age 0.088 -0.004 (0.003)*** (0.000)*** Male 0.093 -0.009 (0.063) (0.009) Family size 0.051 -0.009 (0.021)** (0.003)*** College degree 1.814 -0.137 (0.079)*** (0.012)*** High school diploma 1.290 -0.082 (0.052)*** (0.008)*** Resident in the Centre 0.507 0.037 (0.063)*** (0.009)*** Resident in the South -0.040 0.092 (0.057) (0.008)***
Regressions by number of public employees
Wealth-income ratio
Consumption-income ratio
One public employee -0.001 -0.016 (0.068) (0.010)* More than one public employee -0.204 -0.090 (0.101)** (0.015)*** Post-reform period 0.745 0.058 (0.068)*** (0.010)*** One public employee post-reform 0.281 -0.026 (0.105)*** (0.015)* More than one public employee 0.363 -0.030 post-reform (0.161)** (0.024)
Strongest impact for households with more than 1 public employee
Young vs. old workers Wealth-income ratio
Consumption-income ratio
30 years of contributions
>30 years of contributions
30 years of contributions
>30 years of contributions
Public employee -0.078 0.392 0.006 -0.022 (0.063) (0.150)*** (0.007) (0.010)** Post-reform 0.672 1.194 0.067 0.018 (0.071)*** (0.152)*** (0.016)*** (0.010)* Public employee 0.406 -0.081 -0.034 -0.011 post-reform (0.119)*** (0.253) (0.014)** (0.016)
Strongest impact for young public employees.
Robustness tests
Group-specific pre-treatment trends. Restrict sample to years before the reform and
redefine the post-reform dummy as 1 after 1995. Add to baseline specification post-1995 dummy
and interaction with public employee dummy.
Define treatment group as households whose all members are public employees and control group as households whose all members are private employees.
Regional dummies, sector dummies.
Stronger effects among household with higher education.
Summary
Consumption and wealth effects of 2000 severance pay reform: unanticipated negative shock to lifetime resources.
Baseline: on average, reduction in severance pay equal to one year’s income increases wealth by 4 months income. The offset ratio is 0.4.
The reform reduces consumption by 3pp relative to income.
Heterogeneity: wealth and consumption response stronger among households with more than one public employee and young workers, who expect the strongest decline in severance pay.
Summary
There is no single MPC.
Identify nature of income shock. Several strategies: structural models, natural experiments, direct survey questions.
Effect of shocks depends on whether it is perceived as permanent or transitory
Importance of heterogeneity of response.