Macro Implications of Household Finance
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1 Introduction Model Solution Results Conclusion Appendix Macro Implications of YiLi Chien, Harold Cole and Hanno Lustig Purdue, University of Pennsylvania and UCLA November 3, 2008
2 Introduction Model Solution Results Conclusion Appendix Introduction Portfolio Behavior non-participation: the majority of US households hold only safe assets, real estate and vehicles heterogeneity among participants: large variation in investment styles sophisticated investors earn higher Sharpe ratios on their investments and take on more risk Campbell(2006) infers that households voluntarily limit their set of assets for fear of making mistakes.
3 Introduction Model Solution Results Conclusion Appendix Wealth Distribution wealth distribution is more dispersed than income distribution wealth is highly correlated with equity fraction of portfolio Asset Prices the equity premium is large and volitile the risk-free rate is low and stable. equity premia are counter-cyclical
4 Introduction Model Solution Results Conclusion Appendix Can limiting household trading options account for these features of the data? Conjecture If many households are subject to both aggregate and idiosyncratic risk, but some households passively save via low risk portfolios without adjusting portfolio composition this could force a small number of more active traders to absorb a lot of aggregate risk. Interesting things might happen in such a model.
5 Introduction Model Solution Results Conclusion Appendix Objective of paper Propose to formalize this story and evaluate. develop new method for handling incomplete markets allows for differential portfolio restrictions with ease of analysis and computation plug in some numbers and evaluate story
6 Introduction Model Solution Results Conclusion Appendix Quantitative Findings Introducing heterogeneity in investment behavior helps us understand the connections between household portfolio behavior household wealth distribution asset prices reduces the gap between model and data: model can match moments of asset prices model delivers better match of wealth distribution model delivers better match of risk asset holdings and wealth
7 Introduction Model Solution Results Conclusion Appendix Methodological Contribution develop multiplier method for incomplete market economies use measurability restrictions to capture portfolio restrictions building on Aiyagari, Marcet, Sargent and Seppala et al. (2002) and Lustig, Sleet and Yeltekin (2002)
8 Introduction Model Solution Results Conclusion Appendix Methodological Contribution develop multiplier method for incomplete market economies use measurability restrictions to capture portfolio restrictions develop new state variable - recursive multiplier building on Cuoco and He (2001), Basak and Cuoco (1998), Marcet and Marimon (1999)
9 Introduction Model Solution Results Conclusion Appendix Methodological Contribution develop multiplier method for incomplete market economies use measurability restrictions to capture portfolio restrictions develop new state variable - recursive multiplier construct analytic consumption sharing rule and SDF extends Lustig (2006) complete markets result
10 Introduction Model Solution Results Conclusion Appendix Methodological Contribution develop multiplier method for incomplete market economies use measurability restrictions to capture portfolio restrictions develop new state variable - recursive multiplier construct analytic consumption sharing rule and SDF develop simple quantiative method avoid guessing the mapping from the wealth distribution to equilibrium asset prices similar to Krusell and Smith (1997) avoids complexities of Krusell and Smith (1998)
11 Introduction Model Solution Results Conclusion Appendix Literature literature: our paper: literature: participation vs non-participation active vs passive traders preference heterogeneity EIS (Guvenen (2003), Vissing-Jorgensen (2001)) time discount rate (Krusell and Smith (1998)) our paper: heterogeneity in trading technologies
12 Introduction Model Solution Results Conclusion Appendix Environment Measurability Constraints Macro and Micro Risk Aggregate output Y t = exp(z t )Y t 1 comes in two forms tradeable output (1 γ)y t depends on z t non-tradeable output γy t η t depends on η t Idiosyncratic shocks η are i.i.d. across households and E {η t z t } = 1 π(z t, η t ) is probability of observing z t and η t
13 Introduction Model Solution Results Conclusion Appendix Environment Measurability Constraints Households Continuum of ex ante identical households π(z t, η t )/π(z t ) is fraction of households with history η t given z t. Households have preferences given by: } β t c1 α t 1 α E 0 { t 1 identical CRRA preferences.
14 Introduction Model Solution Results Conclusion Appendix Environment Measurability Constraints Leverage (1 γ)y t comes in two forms bond payouts: R f t (z t 1 )b(z t 1 ) b(z t ) dividend payouts: d t (z t ) ϖ(z t ): price of claim to tradeable output (1 γ)y t assume fixed leverage ψ, which determines b(z t ) and d t (z t ) bond/equity ratio: b(z t ) = ψ [ ϖ(z t ) b(z t ) ]
15 Introduction Model Solution Results Conclusion Appendix Environment Measurability Constraints Heterogeneous Trading Technologies active traders 1. complete market traders (c): trade claims on both z t+1 and η t+1 realizations 2. z-complete market traders (z): passive traders trade claims only on z t+1 realizations 1. diversified traders (div): trade claims to (1 γ)y (z t ) only equivalent to fixed portfolio: 1/(1 + ψ) in levered equity and ψ/(1 + ψ) in risk-free bonds 2. non-participants (np): only a risk-free bond
16 Introduction Model Solution Results Conclusion Appendix Environment Measurability Constraints Sequential Trading all households trade a complete menu of contingent claims a t (z t, η t ) and σ t 1 (z t 1, η t 1 ) shares in the Lucas tree at price ϖ(z t ) net wealth : â(z t, η t ) a(z t, η t ) + σ(z t 1, η t 1 ) [ (1 γ)y (z t ) + ϖ(z t ) ]. subject to a budget constraint a debt bound: â t (z t, η t ) M t (η t, z t ) measurability restrictions on â t (z t, η t ) which replicaes portfolio restriction
17 Introduction Model Solution Results Conclusion Appendix Environment Measurability Constraints Measurability Restrictions 1. active traders: complete traders: no restrictions â t (z t, η t ) z-complete traders: for all t and η t, η t N. â t (z t, η t ) = â t (z t, η t ),
18 Introduction Model Solution Results Conclusion Appendix Environment Measurability Constraints Measurability Restrictions 1. active traders: 2. passive traders: â t (z t, η t ) Rt port (z t ) = ât( z t, η t ) Rt port ( z t ), for all t, z t, z t Z, and η t, η t N. Rt port (z t ) is return on a passive trader s total portfolio: non-participants: Rt port (z t ) = Rt 1 f diversified traders: Rt port (z t ) = R t (z t )
19 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Solving the z-complete Trader s Problem present-value of net savings from state (z t, η t ) onwards: ] S(z t, η t ) = E t [ P(z τ ) (γy (z τ )η τ c(z τ, η τ )). τ t P(z t ) denotes state prices Implicitly, present value price p(z t, η t ) = π(η t z t )π(z t )P(z t ) arbitrage condition when trading is allowed on η t innocuous when not S(z t, η t ) + â t (z t, η t ) = 0 so measureability restrictions on â also apply to S.
20 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Solving the z-complete Trader s Problem β t t=1 +γ { S(z 0, η 0 ) + ϖ(z 0 ) } L = min {γ,ν,ϕ} max {c,â} γ is multiplier on budget constraint { + ν(z t, η t ) t 1 z t,η t ν(z t, η t ) measurability multiplier + t 1 (z t,η t ) ϕ(z t, η t ) debt constraint multiplier. u(c(z t, η t ))π(z t, η t ) (z t,η t ) S(z t, η t ) P(z t )π(z t, η t )â(z t, η t 1 ) { ϕ(z t, η t Mt (z ) t, η t )P(z t )π(z t, η t ) S(z t, η t ) } }.
21 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm First-order condition for c(z t, η t ) β t u (c(z t, η t ))π(z t, η t ) = γ 0 [υ(z τ, η τ ) ϕ(z τ, η τ )] P(zt )π(z t, η t ) (z τ,η τ ) (z t,η t ) First-order condition for â(z t, η t 1 ) η t υ(z t, [ η t 1, η t ] )P(z t )π(z t, η t ) = 0
22 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Multipliers Define recursive multipliers ζ 0 = γ and law of motion ζ t = ζ t 1 + ν t ϕ t. f.o.c. for consumption is given by: β t u (c t ) P(z t ) = ζ t. f.o.c. for â t (z t, η t 1 ) is: in each z t+1. E [ ν t+1 z t+1] = 0
23 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm form of f.o.c. for â t changes with portfolio restrictions For the diversified investors: [ + P(z t, η t ζ(z ) t, η t ) (γη t Y (z t ) c(z t, η t )) + ν (z t, η t ) σ(z t 1, η t 1 ) [(1 γ)y (z t ) + ϖ(z t )] ϕ(z t, η t )M(z t, η t ) t 1 z t,η t ] +γϖ(z 0 ). The first order condition with respect to σ(z t, η t ) is given by: z t+1 z t,η t+1 η t ν ( z t+1, η t+1 ) [ (1 γ)y (z t+1 ) + ϖ(z t+1 ) ] π(z t+1, η t+1 )P(z t+1 ) f.o.c. for â t (z t 1, η t 1 ) implies ζ is a Martingale when the borrowing constraint does not bind since: ν t = ζ t ζ t 1 + ϕ t. = 0.
24 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Martingales General Form of the Martingale condition E [ζ t m t R t ] = ζ t 1 E [m t R t ] where R t is the (possibly state-contingent) return m t = P(z t )/P(z t 1 ) z-complete traders conditioned on (z t, η t 1 ) and R t = 1 passive traders conditioned on (z t 1, η t 1 ) and R t is portfolio return active traders multipliers are conditional martingales and passive traders are twisted martingales.
25 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Euler inequalities martingale conditions imply standard Euler inequalities: np : div : z : c : u (c t ) R f t βe t { u (c t+1 ) } u (c t ) βe t { Rt+1 u (c t+1 ) } { } u (c t ) βe t u (c t+1 ) P(zt ) P(z t+1 ) zt+1 { } u (c t ) β u (c t+1 ) P(zt ) P(z t+1 )
26 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Consumption sharing rule f.o.c. for consumption implies that [ c t = u 1 ζt P(z t ] ) β t. aggregate consumption is: C t = η t c(z t, η t )π(η t z t ). the household consumption share is c t C t = u 1 [ζ(z t, η t )P(z t )] η t u 1 [ζ(z t, η t )P(z t )] π(η t z t ).
27 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Characterizing Equilibrium with Multipliers For all traders, consumption share is: with the aggregate multiplier: c t /C t = ζ 1 α t /h(z t ), h(z t ) = ζ(z t, η t ) 1 α π(η t z t ). η t The stochastic discount factor is: ( ) α ( ) +α Ct+1 ht+1 m t+1 β. C t with the aggregate multiplier: h t h(z t ) = ζ(z t, η t ) 1 α π(η t z t ). η t no need to clear each market separately
28 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm What do these Multipliers do? present value of future savings S is recursive in ζ: S t (ζ; z t, η t ) = C t γη t ζ 1 α t h(z t ) [ P(z + t+1 ] ) E t P(z t ) S t+1(ζ t+1 ; z t+1, η t+1 )
29 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm What do these Multipliers do? S t (ζ; z t, η t ) = C t γη t ζ 1 α [ t P(z h(z t + t+1 ] ) E t ) P(z t ) S t+1(ζ t+1 ; z t+1, η t+1 ) non-participants: S t+1 cannot depend on η t+1 (or z t+1 ) multipliers change in response to shocks η t+1 = hi ν t+1 ζ t+1 η t+1 = lo ν t+1 ζ t+1 enforces measurability constraint on average zero change in multiplier: E t [ζ t+1 m t /E [m t ] z t, η t ] = ζ t u (c t ) = R f t βe t { u (c t+1 ) } enforces Euler equation
30 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Full Participation If 1. there are no non-participants, 2. z t is i.i.d., φ(z t+1 ), and 3. η t is independent of z t 4. M(z t, η t ) = M(η t )Y (z t ). household consumption shares are independent of the aggregate history z t, only depend on η t. (Krueger and Lustig, 2005)
31 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Full Participation Simple Proof Step 1 define S as: S(ζ t ; z t, η t ) = C (z t ) S(ζ t ; η t ). recursive rule for S does not depend on z t
32 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Recursive rule for S(ζ t ; z t, η t ) implies that where S(ζ(z t, η t ); z t, η t ) = γη t ζ(zt, η t ) 1 α h(z t ) +β z t+1 φ(z t+1 z t ) η t+1 ϕ(η t+1 η t ) S(ζ(z t+1, η t+1 ); z t+1, η t+1 ). φ(z t+1 z t ) = φ(z t+1 ) [ h(z t+1 ] γ ) h(z t e (1 γ)z t+1. ) If h(z t+1 )/h(z t ) doesn t depend upon z t, then z t drops out of this recursion.
33 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Full Participation Simple Proof Step 3 define S as: S(ζ t ; z t, η t ) = C (z t ) S(ζ t ; η t ). recursive rule for S does not depend on z t borrowing constraint does not depend upon z t : S(ζ(z t+1, η t+1 ); z t, η t ) M(η t+1 ). (1) for div, z and c traders their measurability constraints do not depend on z t
34 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Full Participation for div, z and c traders their measurability constraints do not depend on z t : z-complete traders: diversified traders: S z (ζ t+1 ; η t+1 ) = S z (ζ t+1 ; η t+1 ) for all η t+1, η t+1 and z t+1, ω(z t+1 ) + (1 γ)y (z t+1 ) C (z t+1 ) S div (ζ t+1 ; η t+1 ) = S div (ζ t+1 ; η t+1 ) for all η t+1, η t+1 z t+1 and z t+1,
35 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Full Participation Simple Proof - complete define S as: S(ζ t ; z t, η t ) = C (z t ) S(ζ t ; η t ). recursive rule for S does not depend on z t borrowing constraint does not depend upon z t : S(ζ(z t+1, η t+1 ); z t, η t ) M(η t+1 ). (2) for div, z and c traders their measurability constraints do not depend on z t hence updating functions T j, j {div, z} are independent of z t. hence h t does not depend on z t
36 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Irrelevance of Aggregate History if no non-participants, h t+1 does not depend on z t+1. all have same portfolio (regardless of y t ) of 1/(1 + ψ) in equity and remainder in risk-free consumption shares do not depend on z t Breeden-Lucas risk premium obtains (small and constant risk premia) m t+1 β ( Ct+1 C t ) α ( ) +α ht+1. with the aggregate multiplier growth rate independent of z t+1 segmentation of households in other trading technologies is irrelevant h t
37 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Non-Participation and Relevance of Aggregate History for non-participants: measurability constraints does depend on z t+1 St+1(ζt+1; z t+1, ηt+1) C (z t, z t )/C (z t = S t+1 (ζ t ; z t+1, η t+1 ) ) C (z t, z t+1 )/C (z t ). updating functions T np does depend of z t+1. h t+1 does depend on z t+1.
38 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Aggregate Savings The aggregate multiplier for each group h j (z t ) is given by h j (z t ) = ζ(zt, η t ) 1/α π(η t z t )dη t η t hj (z t ) h(z t ) is consumption share of trader segment j the aggregate savings function for each group of traders: [ Sa(z j t ) = C (z t ) γµ j hj (z t ) h(z t ) ] + π(zt+1 )P(zt+1 ) π(z t )P(z t S ) a(z j t+1 ). z t+1 market clearing implies: Sa(z j t ) = [ϖ(z t ) + (1 γ)y (z t )] j the same measurability restrictions apply to the aggregate savings function S j a(z t )
39 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Dumping Aggregate Risk? [ Sa np (z t ) = C (z t ) γµ np hnp (z t ) h(z t ) ] + π(zt+1 )P(zt+1 ) π(z t )P(z t ) z t+1 S np a (z t+1 ). for non-participants Sa np (z t ) cannot not depend on z t follows directly from aggregating their measurability restrictions implies counter-cyclical savings share Sa np (z t )/ j Sa(z j t ) generating aggregate risk
40 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Dumping Aggregate Risk? [ Sa div (z t ) = C (z t ) γµ div hdiv (z t ) h(z t ) ] + π(zt+1 )P(zt+1 ) π(z t )P(z t ) z t+1 S div a (z t+1 ). for diversified traders the ratio Sa div (z t )/ j Sa(z j t ) cannot not depend on z t follows directly from aggregating their measurability restrictions bear none of the residual aggregate risk
41 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Dumping Aggregate Risk on active traders. for non-participants Sa np (z t ) cannot not depend on z t for diversified traders the ratio Sa div (z t )/ j Sa(z j t ) cannot not depend on z t for active traders the ratio Sa div (z t )/ j Sa(z j t ) does depend on z t and is procyclical bear all residual aggregate risk of non-participants active traders induced to do so by the spread in state prices
42 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm System of equations Table: System of Equations Martingale Conditions np Ẽ t [ν t+1 ] = 0. div Ẽ t [ν t+1 ] = 0 z E t [ νt+1 z t+1] = 0 c ν t+1 = 0 Measurability Conditions np S t (z t, η t ) = S( z t, η t ) div S t (z t,η t ) St ( zt, ηt ) R t (z t = ) R t ( z t ) z S(z t, η t ) = S(z t, η t )
43 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Solving system of equation updating function T i for ζ: ζ t+1 = T i (z t+1, η t+1 z t, η t )(ζ t ) T i is solution to system of equations defined by: 1. measurability conditions using recursive expression for S 2. martingale conditions 3. borrowing constraint using recursive expression for S h(z t ) is defined as h(z t+1 ) = j T [ T j (z t+1, η t+1 z t, η t )(ζ t ) ] 1 α η t+1 η t ϕ(η t+1 η t )dφ j t,
44 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Algorithm 1. in stage i, guess an aggregate weight forecasting function {h i (z k )} with truncated history z k 2. solve system of equations for updating functions T j, j {z, c, div, np} 3. updating functions define new {h i+1 (z k )}, computed by simulating long panels (N = 3, 000 and T = 10, 000) and averaging: h i+1 (z k+1 ) = j T [ ] 1 T j (z k+1, η t+1 z k α, η t )(ζ t ) η t+1 η t 4. iterate until convergence of {h i+1 (z k )} details ϕ(η t+1 η t )dφ j t,
45 Introduction Model Solution Results Conclusion Appendix Multipliers Full Participation Segmentation Algorithm Algorithm Without analytic asset pricing result: Need to guess asset pricing relationship asset prices can be a complicated function of the wealth distribution. Need to compute market clearing prices in each period of the panel simulation solve for continuation payoff given asset pricing rules in recursion stage. use continuation payoff to compute portfolio demands in simulation stage. compute new prices by solving for market clearing prices in simulation stage. use new prices to update pricing rules. Tough Problem comparison
46 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Calibration Preferences: α = 5 and β =.95 Endowments: aggregate consumption growth: MP aggregate consumption growth E [λ(z)] = and std[λ(z)] =.035 but i.i.d. growth to focus on internal propagation - report other results in paper. no concentration of idio. risk in recessions log η : ρ[log η] =.92
47 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Calibration choose γ to match wealth-to-income ratio Total Collateralizable wealth to income ratio is 4.30 in postwar US data we (conservatively) choose γ =.90. choose segment sizes to match asset prices 10% in z-complete 20% diversified 70% non-participants. adjust segment per capita income to match income distribution So long as shares of nontradeable wealth don t change, prices don t change.
48 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Accuracy The simulation moments are generated by draws from an economy with 3000 agents. For the benchmark calibration max σ([h /h]) E ([h /h]) = History works better than Wealth moments R 2 results for h /h in state-by-state regressions are low with E (W ) and E (W z /W ) range from with additional lagged z t 1 increase to with four lags range from
49 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Market Price of Risk and Risk-Free Rate large and volatile market price of risk σ(m)/e (m) σ(m)/e (m) E [R s R f ] /σ [R s R f ] =.44 low and stable risk-free rate HTT Model HTT Model Data RA Model σ(m)/e (m) E (R f ) Std[σ(m)/E (m)] σ(r f )
50 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Equity Risk Premium large equity premium and Sharpe ratio dividends are a leveraged claim to consumption the leverage parameter ψ is 3 HTT Model Data RA Model E [R s R f ] σ [R s R f ] E [R s R f ] /σ [R s R f ]
51 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Time Variation large and volatile market price of risk σ(m)/e (m) counter-cyclical market price of risk σ t (m)/e t (m) ditto for conditional risk premium h /h shocks Conditional Risk Premium Conditional market price of risk Notes: Market Segmentation: 10% in z-complete, 20% diversified and 70% non-participants.
52 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Equity Share of z-trader Net Wealth/C Portfolio Share of Equity Conditional Market Price of Risk Notes: Market Segmentation: 10% in z-complete, 20% diversified and 70% non-participants.
53 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Household Portfolio Returns z E [Rz W R f ] div E [Rdiv W R f ] np E [Rnp W R f ] z E [Rz W R f ]/σ[rz W R f ] div E [Rdiv W R f ]/σ[rdiv W R f ] np E [Rnp W R f ]/σ[rnp W R f ] more sophisticated investors (CCS, 06): higher Sharpe ratios take on more risk σ[w z /W ] = median Swedish household gives up 1/3 of market s SR
54 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Welfare Costs of Passivity and Nonparticipation Figure: Equity Share Case 1 Case 2 Case 3 Welfare Loss Percentage of consumption Fraction of equity in portfolio Notes: Case 1: 0/10/20 (complete/z-complete/diversified) composition of trader segments. Case 2: 5/5/20 composition. Case 3: 10/0/20 composition.
55 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Household Consumption Growth Standard Deviation Individual Group Avg. z div np Volatility of household consumption growth declines with trading sophistication. But sophisticated household load up on aggregate risk - which leads to group average volatility rising with trading sophistication. Consistent with findings of Malloy, Moskowitz and Vissing-Jorgensen (2007)
56 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Household Consumption-Returns Correlation Correlation Part ρ [R s, ( log(c p )] z ρ [R s, ( log(c z )] div ρ [R s, ( log(c div )] np ρ [R s, ( log(c np )] higher correlation for participants consistent with Mankiw and Zeldes (91) and Brav, Constantinides and Geczy (02) lower risk aversion estimates off the Euler equation for stock returns for wealthier households diversifed traders don t satisfy stockmarket Euler condition
57 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Household Consumption Shares Correlation Part ρ [R s, ( log(ĉ p )] z ρ [R s, ( log(ĉ z )] div ρ [R s, ( log(ĉ div )] np ρ [R s, ( log(ĉ np )] z traders: procyclical consumption shares div traders: constant consumption shares np traders: countercyclical consumption shares
58 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Household Wealth z E [W z /W ] div E [W div /W ] np E [W np /W ] more sophisticated investors: accumulate more wealth by taking on more risk high wealth to income ratio for z traders suggest we can match skewness in wealth distribution
59 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Matching the Income Distribution First we try to better match the income distribution, we reduced the population share of the z traders to 7% reduced the population share of the div. traders to 17 %. Income Distribution Percentile Ratio Model US Data 90/ / / / / / /
60 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Wealth Distribution Bewley HTT Net Asset Total Asset kurtosis skewness Gini W 75 /W W 80 /W W 85 /W W 90 /W Notes: The Bewley model is one in which there are no nonparticipants.
61 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Wealth Distribution we match income distribution by changing fraction of population in each group j 10,000,000 Model 1,000,000 Data (Net Worth) 100,000 10, Percentile of total net worth Notes: Nondiversified wealth shares 10% in z-complete, 20% diversified and 70% non-participants, but adjusted population shares.
62 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Table: Wealth Distribution Over Time -Data and Model Data Std Model Std kurtosis skewness Gini Coefficient Percentile Ratio W 80 /W W 85 /W W 90 /W Notes: The wealth data are from the SCF (all available years). The statistics shown are for Household Net Worth.
63 Introduction Model Solution Results Conclusion Appendix Calibration Asset Prices Consumption Wealth Asset Shares in Model and Data can we replicate asset holdings distribution in the data? Data Model Percentile % % % % % % %
64 Introduction Model Solution Results Conclusion Appendix Conclusion Methods 1. Develop a multiplier method for incomplete markets. 2. Very easy to solve and implement Findings 1. Big distinction between passive and active traders 2. Help us to understand asset prices,consumption and wealth 3. Move closer to matching many features of the data
65 Introduction Model Solution Results Conclusion Appendix Literature basic risk-shifting mechanism similar to Guvenen (2003) Guvenen: had two representative agents: participants and nonparticipants our paper: continuum of each type of active and passive investor Guvenen: production economy with no growth our paper: endowment economy with stochastic growth
66 Introduction Model Solution Results Conclusion Appendix Comparing CCL to Krusell and Smith KS (1996). only traded asset is capital - which is a very good hedge labor is exogenous and stochastic the return on capital is given by z F K (K, L ) + (1 δ), which only depends upon 1 endo variable: K leads to simple procedure - forecast K
67 Introduction Model Solution Results Conclusion Appendix KS (1996) Procedure Assume that there exists a simple forecasting function G (M t, z t ) for K where M t are current moments current capital turns out to work well Compute solution to individual s problem given forecasting rule and wealth w. can use capital savings policy function s(w, z), to compute the total savings level S = s(w, z)ω t (w)dw, given pdf of worker s states. w
68 Introduction Model Solution Results Conclusion Appendix KS (1996) Procedure Simulation methods used to construct pdf of the workers states in each period. draw stochastic panel of aggregate and idio shocks use individual savings function to construct savings choices sum to get S t iterate on forecasting rule for K
69 Introduction Model Solution Results Conclusion Appendix Comparing CCL to Krusell and Smith KS (1997) traded assets expanded to include risk-free bond and capital labor is still exogenous and stochastic the return on capital is still given by z F K (K, L ) + (1 δ), but now need a rule for the bond price q
70 Introduction Model Solution Results Conclusion Appendix KS (1997) Procedure Let G b (M, z) denote the market clearing bond price function let G K (M, z) denote the forecasting function for K which may depend upon q itself. Taking implied return function for capital and the price function for bonds as given, one can solve the individual s problem to construct their continuation payoff function given this continuation payoff tomorrow, one can solve for the individual s asset demand functions today given their individual state and q today.
71 Introduction Model Solution Results Conclusion Appendix KS (1997) Procedure Let s k and s b denote their respective savings functions today. draw stochastic panel of aggregate and idio shocks in panel solve for the q today that clears the bond market q t = w s b (w, z, q)ω t (w)dw = 0, and with that q, determine the level of capital for tomorrow K t+1 = s k (w, z, q)ω t (w)dw, w Given a sequence of implied returns and capital stocks, construct a new forecasting and a pricing rule iterate until the rules converge.
72 Introduction Model Solution Results Conclusion Appendix Comparing CCL to Krusell and Smith In KS the need to compute a market clearing price in each period comes with the addition a new asset whose return or price is not directly implied by some simple aggregate state variable. Our asset pricing result buys us is essentially the same thing as having only capital in the original KS model. We know all prices as a function of a single moment of the distribution of multiplier distribution. However, our forecasting problem may be larger since we must forecast h /h for each possible combination of current and future aggregate states. Though, in our particular application, since we are pricing a one-period Arrow security, the number of market prices that would have to be determined is the same. back
MACRO IMPLICATIONS OF HOUSEHOLD FINANCE Preliminary and Incomplete
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