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Intertemporal Labor Supply Substitution? Evidence from the Swiss Income Tax Holiday Isabel Mart´ ınez a Emmanuel Saez b Michael Siegenthaler a a KOF ETH Zurich b UC Berkeley July 2020

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Page 1: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Intertemporal Labor Supply Substitution?Evidence from the Swiss Income Tax Holiday

Isabel Martınez a Emmanuel Saez b Michael Siegenthaler a

aKOF ETH Zurich

bUC Berkeley

July 2020

Page 2: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

The Frisch Elasticity of Labor Supply

How much more are people willing to work when their wageincreases temporarily, e.g., due to a positive technology shock?

Key parameter in macro models: it amplifies the effects ofproductivity shocks on labor supply and economic activity

Many business cycle models require very large Frisch elasticities(1.5− 4) to match business cycle movements in employment

Hard to identify well empirically, especially for a macro-widechange

Longstanding divide in the micro and macro literature

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 1/33

Page 3: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Contribution: A Population-wide Natural Experimentto Estimate the Observed Frisch Elasticity (with Frictions)

Tax holidays: income faces a tax rate τ = 0 for one period

Ideal natural experiment (Chetty et al., 2013):

exogenous variation in wage rates unrelated to labor supply orhuman capital accumulation decisionssubstantial temporary change in net-of-tax wagesentire populationannual frequency (relevant time frame for business cycles)quasi-pure substitution effect

Our paper:

Variation across time and regions

Identification: Diff-in-Diff (DiD) and Event Studies (ES)

Most closely related papers:

Bianchi et al. (2001), Stefansson (2018), Sigurdsson (2018):Tax holiday in Iceland, 1987

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 2/33

Page 4: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Contribution: A Population-wide Natural Experimentto Estimate the Observed Frisch Elasticity (with Frictions)

Tax holidays: income faces a tax rate τ = 0 for one period

Ideal natural experiment (Chetty et al., 2013):

exogenous variation in wage rates unrelated to labor supply orhuman capital accumulation decisionssubstantial temporary change in net-of-tax wagesentire populationannual frequency (relevant time frame for business cycles)quasi-pure substitution effect

Our paper:

Variation across time and regions

Identification: Diff-in-Diff (DiD) and Event Studies (ES)

Most closely related papers:

Bianchi et al. (2001), Stefansson (2018), Sigurdsson (2018):Tax holiday in Iceland, 1987

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 2/33

Page 5: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Contribution: A Population-wide Natural Experimentto Estimate the Observed Frisch Elasticity (with Frictions)

Tax holidays: income faces a tax rate τ = 0 for one period

Ideal natural experiment (Chetty et al., 2013):

exogenous variation in wage rates unrelated to labor supply orhuman capital accumulation decisionssubstantial temporary change in net-of-tax wagesentire populationannual frequency (relevant time frame for business cycles)quasi-pure substitution effect

Our paper:

Variation across time and regions

Identification: Diff-in-Diff (DiD) and Event Studies (ES)

Most closely related papers:

Bianchi et al. (2001), Stefansson (2018), Sigurdsson (2018):Tax holiday in Iceland, 1987

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 2/33

Page 6: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

1990s Income Tax Reform in Switzerland

Transition from retrospective taxation to annual pay-as-you-earn

Reasons: modernizing, simplifying and harmonizing

Side effect: incomes earned during the two years prior to thechange remained untaxed (blank years, tax holiday)

Year%X 1993 1994 1995 1996 1997 1998 1999 2000

Tax%base%forassessment%period%X

Payment%of%%tax%lia@bility%owed%for%year%X

Income%realized%in%1999

Income%realized%in%2000

Provisional%installments%1999,%final%assessment%in%

2000

Provisional%installments%2000%final%assessment%in%

2001

Incomes%realized%in%%%%%%%%1991%+%1992%(averaged)

Incomes%realized%in%%%%%%%%1993%+%1994%(averaged)

During%1993%and%1994 During%1995%and%1996

Incomes%realized%in%%%%%%%%1995%+%1996%(averaged)

During%1997%and%1998

untaxed incomes!

Decided at Federal level in December 1990 (DBG and StHG)

Cantons chose different years to change: 1999, 2001, and 2003

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 3/33

Page 7: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Outline

1 Introduction

2 Estimation ApproachIdentifying VariationFirst StageSalienceCommon Macro TrendsData

3 ResultsExtensive Margin (Did more people work?)Intensive Margin (Did workers work more hours?)

4 Conclusion

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 4/33

Page 8: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Identifying Variation: Timing Across Regions

Blank Years in Each Canton

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 5/33

Page 9: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

First Stage: Substantial Change in Average Tax Rates

05

1015

20

Avg.

tax

rate

in %

on

a gr

oss

inco

me

of 1

00K

CH

F (re

al v

alue

201

0)

1990 1995 2000 2005 2010

1997-98Tax Holiday in...

Total federal, cantonal and municipal tax, single taxpayer; weighted by municipality population.

1 CHF ≈ 1 USD

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 6/33

Page 10: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

First Stage: Substantial Change in Average Tax Rates

05

1015

20

Avg.

tax

rate

in %

on

a gr

oss

inco

me

of 1

00K

CH

F (re

al v

alue

201

0)

1990 1995 2000 2005 2010

1997-98 1998Tax Holiday in...

Total federal, cantonal and municipal tax, single taxpayer; weighted by municipality population.

1 CHF ≈ 1 USD

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 6/33

Page 11: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

First Stage: Substantial Change in Average Tax Rates

05

1015

20

Avg.

tax

rate

in %

on

a gr

oss

inco

me

of 1

00K

CH

F (re

al v

alue

201

0)

1990 1995 2000 2005 2010

1997-98 1998 1999-00Tax Holiday in...

Total federal, cantonal and municipal tax, single taxpayer; weighted by municipality population.

1 CHF ≈ 1 USD

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 6/33

Page 12: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

First Stage: Substantial Change in Average Tax Rates

05

1015

20

Avg.

tax

rate

in %

on

a gr

oss

inco

me

of 1

00K

CH

F (re

al v

alue

201

0)

1990 1995 2000 2005 2010

1997-98 1998 1999-00Tax Holiday in...

Total federal, cantonal and municipal tax, single taxpayer; weighted by municipality population.

1 CHF ≈ 1 USD

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 6/33

Page 13: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

First Stage: Substantial Change in Average Tax Rates

05

1015

20

Avg.

tax

rate

in %

on

a gr

oss

inco

me

of 1

00K

CH

F (re

al v

alue

201

0)

1990 1995 2000 2005 2010

1997-98 1998 1999-00 2000Tax Holiday in...

Total federal, cantonal and municipal tax, single taxpayer; weighted by municipality population.

1 CHF ≈ 1 USD

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 6/33

Page 14: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

First Stage: Substantial Change in Average Tax Rates

05

1015

20

Avg.

tax

rate

in %

on

a gr

oss

inco

me

of 1

00K

CH

F (re

al v

alue

201

0)

1990 1995 2000 2005 2010

1997-98 1998 1999-00 2000 2001-02Tax Holiday in...

Total federal, cantonal and municipal tax, single taxpayer; weighted by municipality population.

1 CHF ≈ 1 USD

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 6/33

Page 15: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

First Stage: Substantial Change in Average Tax RatesMean average tax rate in the economy: 11.1%

05

1015

20

Avg.

tax

rate

in %

on

a gr

oss

inco

me

of 1

00K

CH

F (re

al v

alue

201

0)

1990 1995 2000 2005 2010

1997-98 1998 1999-00 2000 2001-02Tax Holiday in...

Total federal, cantonal and municipal tax, single taxpayer; weighted by municipality population.

1 CHF ≈ 1 USD

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 6/33

Page 16: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

First Stage: Substantial Change in Marginal Tax RatesMean marginal tax rate in the economy: 24%

010

2030

Mar

g. ta

x ra

te in

% a

t a g

ross

inco

me

of 1

00K

CH

F (re

al v

alue

201

0)

1990 1995 2000 2005 2010

1997-98 1998 1999-00 2000 2001-02Tax Holiday in...

Total federal, cantonal and municipal tax, single taxpayer; weighted by municipality population.

1 CHF ≈ 1 USD

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 7/33

Page 17: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Expected Behavioral Responses

Extensive margin (average tax rate): more people work

Intensive margin (marginal tax rate): people work more

Tax avoidance margin: shift earnings into tax holiday years

Expect larger responses for more elastic subgroups/subgroupswith larger tax changes

WomenHigh income earnersSelf-employed

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 8/33

Page 18: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Salience: Newspaper Coverage and Cantonal Votes

Newspaper Coverage

Newspapers and magazines extensively covered the tax holidays,starting prior to the tax-free years, and with region-specifictiming evidence

Many articles specifically discuss the tax saving opportunitiesexample

Cantonal Votes

14 out of 25 cantons held a referendum dates

Voting material explains the tax holiday to a broad publicvoting material

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 9/33

Page 19: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Common Macro Trends: Unemployment Rates

0

.02

.04

.06

.08

Une

mpl

oym

ent r

ate

1990

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

1997-98 1998 1999-00 2000 2001-02Switzerland

Tax Holiday in...

GDP to: ES regression

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 10/33

Page 20: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Main Data: Matched AHV-Census Data

Social security data (AHV) 1981-2010

panel data covering the universe of the Swiss population

entire individual labor market histories containinguncapped labor incomes (incl. bonuses and stock options)

job spells and unemployment spells per month

+ Census 2000 and 2010

residential history

marital status history

household identifier (relevant for tax calculation)

children

education

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 11/33

Page 21: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Main Data: Matched AHV-Census Data

Disadvantages

hours worked not known → focus on labor earnings

non-random missing data in 1998 for employees→ 1998 generally excluded from analysis

self-employment incomes missing in 1999 & 2000

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 12/33

Page 22: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Outline

1 Introduction

2 Estimation ApproachIdentifying VariationFirst StageSalienceCommon Macro TrendsData

3 ResultsExtensive Margin (Did more people work?)Intensive Margin (Did workers work more hours?)

4 Conclusion

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 13/33

Page 23: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Outline

1 Introduction

2 Estimation ApproachIdentifying VariationFirst StageSalienceCommon Macro TrendsData

3 ResultsExtensive Margin (Did more people work?)Intensive Margin (Did workers work more hours?)

4 Conclusion

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 13/33

Page 24: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Wage Employment Rate: Men Aged 20-60

55

65

75

85

95

Wag

e em

ploy

ees/

popu

latio

n (in

%)

1990

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

1997-98 1999-00 2001-021998 2000

Tax Holiday in...

Data source: AHV-STATPOP

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 14/33

Page 25: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Wage Employment Rate: Women Aged 20-60

55

65

75

85

95

Wag

e em

ploy

ees/

popu

latio

n (in

%)

1990

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

1997-98 1999-00 2001-021998 2000

Tax Holiday in...

Data source: AHV-STATPOP SLFS

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 15/33

Page 26: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Event Study - Regressions at Individual Level

Yit = αi + αt +4

∑k=−4

δkTHkct + Xit + εit

Yit : outcome of individual i in period t

αi and αt : person and year fixed effects

∑4k=−4 δkTH

kct : a sequence of event study dummies equal to 1

k periods away from the first year of the federal tax holiday incanton c (excluding t − 2, which serves as reverence period)

Controls Xit : age, age squared, age by gender; linear time trendsby canton of residence; two dummies for t ≤ 5 and t ≥ 5

Identifying assumptions:

Common trends in outcomes(e.g., employment and unemployment rates)

Elastic labor demand

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 16/33

Page 27: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Event Study - Regressions at Individual Level

Yit = αi + αt +4

∑k=−4

δkTHkct + Xit + εit

Yit : outcome of individual i in period t

αi and αt : person and year fixed effects

∑4k=−4 δkTH

kct : a sequence of event study dummies equal to 1

k periods away from the first year of the federal tax holiday incanton c (excluding t − 2, which serves as reverence period)

Controls Xit : age, age squared, age by gender; linear time trendsby canton of residence; two dummies for t ≤ 5 and t ≥ 5

Identifying assumptions:

Common trends in outcomes(e.g., employment and unemployment rates)

Elastic labor demandIntertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 16/33

Page 28: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Was Labor Demand Elastic?

Tax holidays create incentive to increase labor supply

If labor demand is not perfectly elastic: wage rate could fall→ dampened effect on earnings→ estimated Frisch elasticity too low

BUT: Wage Structure Survey (LSE) shows:

If anything increasing wage ratesSmall but positive response of hours worked

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 17/33

Page 29: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Wage Rate

32

34

36

38

40

42

Hou

rly w

age

(in C

HF)

1994

1996

1998

2000

2002

2004

2006

2008

2010

1998 1999-00 or 2000 2001-02Tax Holiday in...

Data Source: Wage Structure Survey (LSE)

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 18/33

Page 30: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Hours Worked

150

155

160

165

170

175H

ours

wor

ked

per w

orke

r

1994

1996

1998

2000

2002

2004

2006

2008

2010

1998 1999-00 or 2000 2001-02Tax Holiday in...

Data Source: Wage Structure Survey (LSE)single women married women SLFS

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 19/33

Page 31: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Event Study: First Stage

-.05

0

.05

.1

.15Ef

fect

of t

ax h

olid

ay

k=-4

k=-3

k=-2

k=-1

1st T

H

2nd T

H k=2

k=3

k=4

Years from tax holiday start

log(1 - average tax rate)

this is a place holder

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 20/33

Page 32: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Event Study: Extensive Margin (Wage Earners)

-.05

0

.05

.1

.15Ef

fect

of t

ax h

olid

ay

k=-4

k=-3

k=-2

k=-1

1st T

H

2nd T

H k=2

k=3

k=4

Years from tax holiday start

log(1 - average tax rate)Employment 0/1

detail

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 21/33

Page 33: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Nothing Ever Happens at the Extensive Margin

Married women

Older workers (age 51-60)

Number of jobs

Months employed

Entry or exit of self-employed

...

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 22/33

Page 34: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Outline

1 Introduction

2 Estimation ApproachIdentifying VariationFirst StageSalienceCommon Macro TrendsData

3 ResultsExtensive Margin (Did more people work?)Intensive Margin (Did workers work more hours?)

4 Conclusion

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 23/33

Page 35: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Average Wage Earnings

0

10

20

30

40

50

60

70

Wag

e ea

rnin

gs p

er p

erso

n (in

1k

CH

F)

1990

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

1997-98 1999-00 2001-021998 2000

Tax Holiday in...

1 CHF ≈ 1 USD

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 24/33

Page 36: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Average Self-employment Earnings

0

20

40

60

80

100Se

lf-em

ploy

men

t ear

ning

s (in

1k

CH

F)

1990

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

1997-98 1999-00 2001-021998 2000

Tax Holiday in...

Sample: Individuals with positive self-employment earnings

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 25/33

Page 37: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Event Study: First Stage

-.1

-.05

0

.05

.1

.15

.2

.25Ef

fect

of t

ax h

olid

ay

k=-4

k=-3

k=-2

k=-1

1st T

H

2nd T

H k=2

k=3

k=4

Years from tax holiday start

log(1 - marginal tax rate)

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 26/33

Page 38: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Event Study: Intensive Margin (Wage Earners)

-.1

-.05

0

.05

.1

.15

.2

.25

Effe

ct o

f tax

hol

iday

k=-4

k=-3

k=-2

k=-1

1st T

H

2nd T

H k=2

k=3

k=4

Years from tax holiday start

log(1 - marginal tax rate)Average wage earnings

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 27/33

Page 39: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Event Study: Intensive Margin (Wage Earners)

-.02

0

.02

.04

Effe

ct o

f tax

hol

iday

k=-4

k=-3

k=-2

k=-1

1st T

H

2nd T

H k=2

k=3

k=4

Years from tax holiday start

Average wage earnings

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 28/33

Page 40: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Frisch Elasticity Estimates (Wage Earners) IV est.

Frisch elasticity ηF = ∆ ln y/∆ ln[1− τ]

Men Women

Employ- Earningsa Employ- Earningsa

ment rate p. employee ment rate p. employee

Panel A: Total sampleFrisch elasticity ηF -0.001 0.037* -0.017 0.018

Panel B: Married with childrenFrisch elasticity ηF -0.005 0.052 -0.071 0.027

Panel C: Married no childrenFrisch elasticity ηF -0.004 0.032** 0.023 0.016

Observations 105 105 105 105Canton group FE Yes Yes Yes YesPeriod FE Yes Yes Yes Yes

a In 1000 CHF. *p < 0.1, ** p < 0.05, *** p < 0.01.

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 29/33

Page 41: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Average Wage Earnings: High-income Employees

100

125

150

175

200

Wag

e ea

rnin

gs p

er p

erso

n (in

1k

CH

F)

1990

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

1997-98 1999-00 2001-021998 2000

Tax Holiday in...

High income: avg. real wage earnings in 1994-1996 > 100k CHF/year

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 30/33

Page 42: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Frisch by Pre-Reform Earnings (annual avg. 1994-1996) IV est.

Emp. rate Earnings Earnings Earnings(in %) p.p. (incl. 0) p. employee p. self-empl.

Panel A: 1–25k CHFFrisch elasticity ηF -0.025 0.034 0.070 0.236

25k–50k CHFFrisch elasticity ηF -0.010 0.013 0.020 0.238

50k–100k CHFFrisch elasticity ηF -0.009 0.013 0.018 0.261**

100k–200k CHFFrisch elasticity ηF -0.001 0.037** 0.038** 0.248***

More than 200k CHFFrisch elasticity ηF -0.001 0.086*** 0.089** 0.182***

Observations 105 105 105 80Canton group FE Yes Yes Yes YesPeriod FE Yes Yes Yes Yes

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 31/33

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Event Study: Self-Employment Income By gender

-.1

-.05

0

.05

.1

.15

.2Ef

fect

of t

ax h

olid

ay

k=-4

k=-3

k=-2

k=-1

1st T

H

2nd T

H k=2

k=3

k=4

Time from tax holiday start

All self-employed>100k CHF in 1994/96

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 32/33

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Conclusion

1 Significant but quantitatively small responses of earningsconsistent with an observed Frisch elasticity of 0.05

2 No responses along the extensive margin, even for groups lessattached to the labor force

3 Self-employed and high income earners display larger responses

4 Estimates may even be upward biased due to tax avoidance

Our results do not support the idea that the labor supply channelplays a major role in explaining business cycles.

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 33/33

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Thank you.

Comments and questions welcome:[email protected]

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 34/33

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Appendix

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 35/33

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Empirical Evidence: Extensive Margin Elasticity

εFext =∆log(E/P)∆log(wnet)

Chetty et al. (2013), Table 1

back

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 36/33

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Average Tax Rates over Time: Low Income Households

02

46

Avg.

tax

rate

in %

on

a gr

oss

inco

me

of 2

5K C

HF

(real

val

ue 2

010)

1990 1995 2000 2005 2010

1997-98 1998 1999-00 2000 2001-02Tax Holiday in...

Total federal, cantonal and municipal tax, single taxpayer; weighted by municipality population.

Data source: Parchet (2018) and ESTV, own calculations back

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 36/33

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Average Tax Rates over Time: SSER-Sample

0

5

10

15

20

25Av

erag

e ta

x ra

te in

%

1990

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

1997-98 1999-00 2001-021998 2000

Tax Holiday in...

Data source: Parchet (2018) and ESTV, SSER-data, own calculations back

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 37/33

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Marginal Tax Rates over Time: SSER-Sample

0

5

10

15

20

25M

argi

nal t

ax ra

te in

%

1990

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

1997-98 1999-00 2001-021998 2000

Tax Holiday in...

Data source: Parchet (2018) and ESTV, SSER-data, own calculations back

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 38/33

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Iceland 1987 Tax Holiday: No Obvious Counterfactual

Em

ploy

men

t Rat

e

Year

Empirical (Bianchi et al. 2001)

75%

80%

85%

90%

95%

1982 1984 1986 1988 1990 1992

Figure 1a: 1987 Tax Holiday in Iceland

back

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 39/33

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Salience: Newspaper Coverage by Region

Number of articles per outlet referring to the tax holidays back

0

20

40

60

Artic

les

per n

ewsp

aper

1995

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

1998 (NZZ, Tages-Anzeiger)1999-00 (Der Bund, BZ, Neue Luzerner Zeitung)2000 (Solothurner Zeitung, Tribune de Genève)2001-02 (24 Heures, Le Matin, Le Temps)

Tax holiday in...

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 40/33

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Salience: Popular Referenda Held in 14 Cantons

Dates of popular referenda on the reform back

ZH 8.6.1997

AG 18.4.1999AI 25.4.1999

GR 13.6.1999BL 13.6.1999

OW 24.10.1999GL 7.5.2000AR 21.5.2000BE 21.5.2000UR 21.5.2000

SH 27.8.2000SZ 24.9.2000

NW 26.11.2000ZG 26.11.2000

1996 1997 1998 1999 2000 2001 2002 2003 2004Date of popular referendum

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 41/33

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Salience: Newspaper Coverage backWalliser Bote | Freitag, Februar 16, 2001 | None | 25 http://newspaper.archives.rero.ch/Olive/APA/SNL_DE/Print.Page.aspx...

1 of 1 16.06.17, 10:38

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 42/33

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Salience: Cantonal Voting Material

Jahr 1997 1998 1999 2000 2001 ' Einkünfte: Ordentliches Jahreseinkommen 70000 70000 80'000 90'000 65'000 ausserordentliche Einkünfte 100'000 20000 inkl. ausserordentliche Aufwendungen 30000 0 inkl. Steuerveranlagung: ordentl. Einkommen: Revision vorbehalten! 70'000 70'000 65'000 (80000 und 90000 fallen in die Bemessungslücke) ausserordentliches Einkommen: (separate Jahressteuer) ausserordentliche Aufwendungen:

100'000 20'000

Revision der HE 1999/2000: 55'000 55'000 70000 — (30000 : 2) = 55000

altes Recht / übergangsrecht neues Recht Kalenderjahr 1997 1998 1999 2000 2001 2002 Steuerperiode 1999/2000 Bemessungsperiode Deklaration

Separate Besteuerung der ausserordentl. Einkünfte

der Bemessungslücke Deldaration

Revision der HE 99/00 für ausserord. Aufwendungen

der Bemessungslücke / Dekl.

rei'

)00(X )000(

2f7

I7 XXXX XXXX

Steuerperiode 2001 Bemessungsperiode Deklaration 27

Steuerperiode 2002 Bemessungsperiode

Schematische Darstellung der Übergangsregelung:

3.2.2 Aufhebung der Steuerbefreiung der AI-Beteiligungserträge

Das geltende Steuergesetz befreit die Be-teiligungen an im Kanton steuerpflichti-gen Kapitalgesellschaften und Genossen-schaften und deren Ausschüttungen. Sie werden nur für die Satzbestimmung mit-berücksichtigt. Diese Bestimmung be-

zweckt die wirtschaftliche Förderung und Anbindung der einheimischen Be-triebe bzw. die angestrebte Wohnsitznah-me der Eigentümer im Kanton.

Diese Steuerbefreiung ist aus der Sicht des StHG und nach Art. 4 der Bundesver-fassung nicht mehr zulässig. Die wirt-schaftliche Doppelbesteuerung, d.h. zu-

erst die Besteuerung des Gewinns bei der Gesellschaft und später die Besteuerung der ausgeschütteten Dividende bei den Aktionären ist im schweizerischen Steu-ersystem klar gewollt. Eine Steuerbefrei-ung von (bestimmten) ausgeschütteten Dividenden würde die Grundsätze der Rechtsgleichheit und der Besteuerung nach der wirtschaftlichen Leistungs-fähigkeit verletzen. Standeskommission und Grosser Rat ver-treten die Auffassung, dass die Aufhe-bung dieser Steuerbefreiung mindestens teilweise zu kompensieren ist. Dies soll einerseits durch eine Senkung des Steu-ertarifs auf Stufe Kapitalgesellschaft ge-schehen. Die Benachteiligung des Kan-tons als Wirtschaftsstandort wegen seiner peripheren Verkehrslage kann aber auf Stufe Unternehmung nicht genügend ausgeglichen werden. Es sind zusätzliche steuerliche Anreize für die Unternehmer notwendig, damit Appenzell I.Rh. auch als Wohnortskanton attraktiver wird. Dies soll durch eine ermässigte Besteue-rung der Beteiligungserträge auf Stufe Aktionär geschehen. Die Gestaltung des

3.2.3 Totalrevision

Das geltende kantonale Steuergesetz vom 28. April 1968 ist seit dem 1. Januar 1969 in Kraft. Seither erfuhr es insgesamt neun Teilrevisionen. Nach der dreissigjährigen Geltungsdauer des Steuergesetzes von

Einkommenssteuertarifs liegt im kanto-nalen Hoheitsgebiet. Diese Ermässigung bezweckt, die tatsächliche wirtschaftli-che Doppelbelastung zu mildern, soweit die ausgeschütteten Beteiligungserträge bereits in der gehaltenen Gesellschaft voll besteuert worden sind. Dies erfolgt beim Aktionär durch die Anwendung des halben Gesamtsteuersatzes, vorausge-setzt sein Anteil an der gesamten Beteili-gung beträgt mindestens 20 % oder weist einen Verkehrswert von mindestens 2 Mio. Franken auf; das übrige Einkom-men bleibt zum Gesamtsteuersatz steuer-bar. Durch die Ermässigung im Verhält-nis zum Gesamteinkommen bleibt der Grundsatz der Besteuerung nach der wirtschaftlichen Leistungsfähigkeit ge-währleistet; die Ermässigung ist für Be-teiligungen an inner- und ausserkantona-len Gesellschaften anwendbar, womit das Gebot der Rechtsgleichheit eingehalten ist. Die Tarifermässigung muss aus Kon- trollgründen und wegen der nicht vergleichbaren ausländi-schen Steuerrechte auf schweizerische Gesellschaften begrenzt werden.

1968 ist eine weitere Anpassung des kan-tonalen Steuerrechts an das Bundeshar-monisierungsrecht erforderlich, welche eine umfassende Revision des kantonalen Steuerrechts notwendig macht. Die Fülle der vorzunehmenden materiellen Ände-rungen, insbesondere betreffend die neue

Vereinfachtes Zahlenbeispiel:

Die Steuerermässigung sei an folgenden Beispielen dargestellt:

Steuerbares Einkommen (satzbestimmend) 80'000 80'000 200'000 800'000 davon Beteiligungsertrag 20'000 60'000 50'000 700'000 Steuerbares Einkommen ohne Beteilig.ertrag 60'000 20'000 150'000 100'000

Steuerberechnung (einfache Steuer): a/Beteiligungsertrag 520 1'560 1'825 28'000 a/übrigem Einkommen 3'120 1'040 10'950 8'000 Total einfache Steuer 3'640 2'600 12'775 36'000

Vergleich: Vollbesteuerung ohne Privilegierung 4'160 4'160 14'600 64'000 Steuerermässigung in Fr. 520 1'560 1'825 28'000 Steuermässigung in % der Vollbesteuerung 12,5 °A 37,5 % 14,3 ''/o 43,8 %

86 87

This table explains the transition with a numerical example,pointing out the blank years and extraordinary incomes andexpenses (canton AI).

back

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 43/33

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Salience: Pillar 3a Savings

No incentives to contribute to pillar 3a during blank years back

.2

.4

.6

.8

1

1.2

Num

ber o

f acc

ount

s (in

mio

)

1990 1995 2000 2005

banks insurances3a accounts held by

Log scale.Source: BFS, BSV

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 44/33

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Common Macro Trends: Growth in GDP p.c.

-10

-50

510

Annu

al g

row

th ra

te in

GD

P p.

c.

1990 1992 1994 1996 1998 2000 2002 2004

1997-98 1998 1999-00 2000 2001-02Switzerland

Tax Holiday in...

to: unemployment to: ES regression

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 45/33

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Hours Worked per Month: Married Women

105

110

115

120

125

Hou

rs w

orke

d pe

r per

son

empl

oyed

1996 1998 2000 2002 2004 2006 2008 2010

1998 1999-00 2001-02Tax Holiday in...

Data Source: Wage Structure Survey (LSE) back

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 46/33

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Hours Worked per Month: Single Women

145

150

155

160

165

Hou

rs w

orke

d pe

r per

son

empl

oyed

1996 1998 2000 2002 2004 2006 2008 2010

1998 1999-00 2001-02Tax Holiday in...

Data Source: Wage Structure Survey (LSE) back

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 47/33

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Hours Worked per Week (SLFS)

2527

2931

3335

Hou

rs w

orke

d pe

r wee

k

1995 1997 1999 2001 2003 2005 2007 2009

1997-98 1999-00 2001-02Tax holiday in...

Data Source: SLFS (SAKE) back

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 48/33

Page 61: Intertemporal Labor Supply Substitution? Evidence from the ...saez/taxholiday_slides.pdfApr 18, 1999  · timing evidence Many articles speci cally discuss the tax saving opportunities

Event Study: Extensive Margin (Wage Earners)

-.05

-.025

0

.025

.05Ef

fect

of t

ax h

olid

ay

k=-4

k=-3

k=-2

k=-1

1st T

H

2nd T

H k=2

k=3

k=4

Years from tax holiday start

Employment (Extensive Margin)

back

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 49/33

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Employment Rate (SLFS)

5565

7585

95Em

ploy

men

t rat

e in

%

1995 1997 1999 2001 2003 2005 2007 2009

1997-98 1999-00 2001-02Tax holiday in...

Data source: SLFS (SAKE) back

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 50/33

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Months Employed, Number of Jobs, the Share ofSelf-Employed, and Between-Canton Migration

(1) (2) (3) (4)Jobs per Months employed Unemployed / In-migrant /employed per employed pop (in %) pop. (in %)

Total sampleBlank year -0.0031 0.0178 -0.306 -0.020

(0.0052) (0.0108) (0.239) (0.052)MenBlank year -0.0030 0.0173 -0.307 -0.027

(0.0055) (0.0112) (0.266) (0.048)WomenBlank year -0.0031 0.0175 -0.318 -0.010

(0.0054) (0.0132) (0.223) (0.056)Married womenBlank year -0.0033 0.0152 -0.303 0.012

(0.0066) (0.0194) (0.180) (0.024)

Observations 105 105 105 105Canton group FE Yes Yes Yes YesPeriod FE Yes Yes Yes Yes

back

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 51/33

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Individual-level IV Estimates (Wage Earners) Macro estimates

Employee Avg. wage Employee Avg. wage0/1 earnings a 0/1 earnings a

Men Men Women Women

Total sample1st stage 0.115 0.248 0.106 0.238Effect on log(1− τit ) (0.002) (0.004) (0.002) (0.004)

2nd stage -0.008 3,792 -0.015 323log(1− τit ) (0.005) (606) (0.007) (251)

Frisch elasticity ηF -0.01 (0.005) 0.04 (0.006) -0.02 (0.009) 0.01 (0.005)

Observations 12,905,961 10,878,290 13,241,977 9,470,890

Married w/ childrenFrisch elasticity ηF 0.00 (0.005) 0.04 (0.007) 0.00 (0.015) 0.05 (0.008)

Married no childrenFrisch elasticity ηF -0.03 (0.006) 0.03 (0.005) -0.01 (0.006) 0.01 (0.003)

Tertiary educationFrisch elasticity ηF 0.00 (0.007) 0.05 (0.006) -0.02 (0.008) 0.01 (0.005)

a In CHF. Numbers in bold indicate statistical significance with p < 0.05.

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 52/33

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Individual-level IV Estimates by Pre-Holiday Earnings(Wage Earners) Macro estimates

Employee Aver. wage Employee Aver. wage0/1 earnings 0/1 earningsMen Men Women Women

1–25k CHFFrisch elasticity ηF -0.01 (0.025) -0.01 (0.025) -0.04 (0.012) -0.03 (0.018)

25–50k CHFFrisch elasticity ηF -0.01 (0.010) 0.03 (0.008) -0.01 (0.006) 0.02 (0.004)

50–100k CHFFrisch elasticity ηF -0.02 (0.004) 0.03 (0.004) -0.01 (0.006) 0.01 (0.003)

100–200k CHFFrisch elasticity ηF -0.02 (0.007) 0.04 (0.006) -0.01 (0.015) 0.02 (0.010)

>200k CHFFrisch elasticity ηF 0.00 (0.010) 0.08 (0.015) -0.09 (0.062) 0.09 (0.046)

Numbers in bold indicate statistical significance with p < 0.05.

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 53/33

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Event Study: Self-Employment Income by Gender back

-.1

-.05

0

.05

.1

.15

.2Ef

fect

of t

ax h

olid

ay

k=-4

k=-3

k=-2

k=-1

1st T

H

2nd T

H k=2

k=3

k=4

Time from tax holiday start

MaleFemale

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 54/33

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Bonus-Incidence: Male Employees in the Private Sector

Fraction with bonus above 5K CHF

.05

.1

.15

.2

.25

Bonu

s >5

K C

HF

rece

ived

1994

1996

1998

2000

2002

2004

2006

2008

2010

1998 1999-00 or 2000 2001-02Tax Holiday in...

Data Source: Wage Structure Survey (LSE) Insurances Anecdotal evidence Conclusion

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 55/33

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Bonus Incidence: Insurance Industry

Fraction with bonus above 20K CHF0

.02

.04

.06

.08

.1Bo

nus

>20K

CH

F re

ceiv

ed

1996 1998 2000 2002 2004 2006 2008 2010

1998 1999-00 2001-02Tax Holiday in...

Data Source: Wage Structure Survey (LSE) back Conclusion

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 56/33

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Anecdotal Evidence:Doctors Shift Billing of Treatment Costs

back Conclusion

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 57/33

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References I

Bianchi, Marco, Bjorn R. Gudmundsson, and Gylfi Zoega, “Iceland’sNatural Experiment in Supply-Side Economics,” The American EconomicReview, 2001, 91 (5), 1564–1579.

Chetty, Raj, Adam Guren, Dayanand S. Manoli, and Andrea Weber, “DoesIndivisible Labor Explain the Difference between Micro and MacroElasticities? A Meta-Analysis of Extensive Margin Elasticities,” NBERMacroeconomics Annual, 2013, 27 (1), 1–56.

Parchet, Raphael, “Are Local Tax Rates Strategic Complements or StrategicSubstitutes?,” American Economic Journal: Economic Policy, 2018,forthcoming.

Sigurdsson, Josef, “Labor Supply Responses and Adjustment Frictions: ATax-Free Year in Iceland,” Working Paper 2018.

Stefansson, Arnaldur, “Labor supply response to a tax holdy: The take-homefrom a large and salient shock,” Mimeo 2018.

Intertemporal Labor Supply Substitution Martınez, Saez, Siegenthaler 58/33