the home bias of the poor foreign asset portfolios across the wealth distribution abstract this paper documents how the share of foreign stocks in us household portfolios rises with the ratio of financial wealth to non financial income this is both because wealthier households are more likely to participate in foreign asset markets and because portfolio shares of participants increase with financial wealth but decrease with non financial income a simple standard two country general equilibrium model shows that hedging of terms of trade movements and non financial income risk produces non trivial heterogeneity in portfolios across the wealth and income distribution within countries that is qualitatively in line with this evidence

banking in computable general equilibrium economies abstract in this paper we develop a computable general equilibrium economy that models the banking sector explicitly banks intermediate between households and between the household sector and the government sector households borrow from banks to finance their purchases of houses and they lend to banks to save for retirement banks pool households savings and they purchase interest bearing government debt and non interest bearing reserves we use this structure to answer two sets of questions one normative in nature that evaluates the welfare costs of alternative monetary and tax policies and one positive in nature that studies the real effects of following a procyclical interest rate policy rule

occupational choice and the process of development this paper models economic development as a process of institutional transformation by focusing on the interplay between agents occupational decisions and the distribution of wealth because of capital market imperfections poor agents choose working for a wage over self employment and wealthy agents become entrepreneurs who monitor workers only with sufficient inequality however will there be employment contracts otherwise there is either subsistence or self employment thus in static equilibrium the occupational structure depends on distribution since the latter is itself endogenous we demonstrate the robustness of this result by extending the model dynamically and studying examples in which initial wealth distributions have long run effects in one case the economy develops either widespread cottage industry self employment or factory production employment contracts depending on the initial distribution in the other example it develops into prosperity or stagnation

transitional dynamics and the distribution of wealth in a neoclassical growth model abstract the evolution of the personal distribution of wealth in a standard neoclassical growth model is studied if the economy is growing toward the steady state and preferences are such that marginal utility from consumption is infinite finite at some all positive non negative consumption level s then the average saving propensity of agents is positively negatively related to their wealth if the economy is decaying toward the steady state these relationships are reversed if wealth and average saving propensity are positively negatively related the distribution of current period wealth lorenz dominates is lorenz dominated by next period s distribution of wealth

tough love and intergenerational altruism tough love and intergenerational altruism this article develops and studies a tough love model of intergenerational altruism we model tough love by modifying the barro becker standard altruism model in two ways first the child s discount factor is endogenously determined so lower childhood consumption leads to a higher discount factor later in life second the parent evaluates the child s lifetime utility with a constant high discount factor our model predicts that parental transfers will fall when the child s discount factor falls this is in contrast with the standard altruism model which predicts that parental transfers are independent of exogenous changes in the child s discount factor

individual and aggregate labor supply in heterogeneous agent economies with intensive and extensive margins we develop a heterogeneous agent general equilibrium model that incorporates both intensive and extensive margins of labor supply a nonconvexity in the mapping between time devoted to work and labor services distinguishes between extensive and intensive margins we consider calibrated versions of this model that dier in the value of a key preference parameter for labor supply and the extent of heterogeneity the model is able to capture the salient features of the empirical distribution of hours worked including how individuals transit within this distribution we then study how the various specications inuence labor supply responses to aggregate technology shocks we nd that abstracting from intensive margin adjustment has large eects on the volatility of aggregate hours even if intensive margin uctuates relatively little

information heterogeneity and market incompleteness information is market consistent if agents only use market prices to infer the underlying states of the economy this paper applies this concept to a stochastic growth model with incomplete markets and heterogeneous agents the economy with market consistent information can never replicate the full information equilibrium and there are substantial differences in impulse responses to aggregate productivity shocks these results are robust to the introduction of a noisy public signal and aggregate financial markets we argue that the principle of market consistent information should be applied to any model with incomplete markets

asset returns with transactions costs and uninsured individual risk abstract we explore whether incorporating an explicit motive for holding liquid assets within an equilibrium asset pricing model helps explain the following features of asset returns and turnover in the post war u s economy i the low risk free real interest rate ii the large spread between returns on liquid assets and stocks and iii the greater transaction velocity of liquid assets relative to stocks we introduce a demand for liquid assets by adding uninsured individual risk together with differential costs of trading securities numerical simulations attempting to match the return data generate a ratio of liquid assets to income considerably below observed levels

income and wealth heterogeneity in the macroeconomy how do movements in the distribution of income and wealth affect the macroeconomy we analyze this question using a calibrated version of the stochastic growth model with partially uninsurable idiosyncratic risk and movements in aggregate productivity our main finding is that in the stationary stochastic equilibrium the behavior of the macroeconomic aggregates can be almost perfectly described using only the mean of the wealth distribution this result is robust to substantial changes in both parameter values and model specification our benchmark model whose only difference from the representative agent framework is the existence of uninsurable idiosyncratic risk displays far less cross sectional dispersion and skewness in wealth than u s data however an extension that relies on a small amount of heterogeneity in thrift does succeed in replicating the key features of the wealth data furthermore this extension features aggregate time series that depart significantly from permanent income behavior

earnings inequality and other determinants of wealth inequality abstract we study the relation between the distribution of labor earnings and the distribution of wealth we show theoretically as well as empirically that while labor earnings and precautionary savings are important determinants of wealth inequality factors they cannot by themselves account for the thick tail of the large top shares in the observed distribution of wealth other determinants like stochastic returns to wealth as well as savings rates and rates of returns increasing in wealth need to be accounted for

asset pricing puzzles and incomplete markets the representative agent theory of asset pricing is modified to incorporate heterogeneous agents and incomplete markets the model features two types of agents who differ up to a nontradable idiosyncratic component in their endowment processes numerical solutions indicate that individuals are able to diversify a substantial portion of their idiosyncratic income risk through riskless borrowing and lending alone restrictions on the variability of intertemporal marginal rates of substitution hansen and jagannathan 1991 are used to argue that incomplete markets as modeled here cannot account for the properties of asset returns that are anomalous from the perspective of representative agent theory a large literature in financial economics has investigated the extent to which variants of the lucas 1978 general equilibrium theory of asset pricing can account for the joint behavior of aggregate u s consumption and asset returns by and large this literature has concluded that a theory based upon frictionless arrow debreu markets and or a representative agent makes strongly counterfactual predictions regarding even the simple unconditional properties of this relationship mehra and prescott 1985 for instance show that the theory drastically underpredicts the average excess rate of return on u s stocks the so called equity premium puzzle weil 1989 points out as did mehra and prescott that the magnitude of the average risk free rate is far below that predicted by the theory this has been dubbed the risk free rate puzzle numerous authors including grossman melino and shiller 1987 and backus gregory and zin 1989 show that the theory cannot account for term premia inherent in the yield curve hodrick 1987 surveys a large literature which documents the theory s shortcomings in accounting for excess expected returns in foreign exchange markets the notion that the representative agent model cannot account for excess returns across a wide array of asset markets can be made more precise by using tools developed by hansen and jagannathan 1991 and shiller 1982

heterogeneity aggregate uncertainty and the short term interest rate this article analyzes the relationship between the short term interest rate and diversity i e the number of types in models with heterogeneous agents and incomplete markets the number of types needed to approximate a continuum varies across examples in all cases however the number of types has little effect on the average interest rate and consumption variability in these models the set of state variables is large because the equilibrium law of motion depends on the cross sectional wealth distribution the article shows how to solve these models numerically by approximating the distribution using moments or percentiles

the welfare cost of inflation under imperfect insurance abstract this paper examines the welfare cost of inflation in an economy where agents hold money in order to smooth consumption in the face of income variability for which there is no insurance the findings indicate that for the type of economies considered here the area under the empirical money demand curve is a poor measure of the welfare cost of inflation this area accounts for only one fourth of the true costs in the case of 5 inflation

on the size of u s government political economy in the neoclassical growth model we study a dynamic version of meltzer and richard s median voter model of the size of government taxes are proportional to total income and they are redistributed as equal lump sum transfers voting takes place periodically over time and each consumer votes for the tax rate that maximizes his equilibrium utility we calibrate the model to u s data key elements in the calibration are the income and wealth distribution and the parameters governing the leisure and consumption choices the total size of transfers predicted by our political economy model is quite close to the size of transfers in the data

median voter equilibria in the neoclassical growth model under aggregation we study a dynamic version of meltzer and richard s median voter model where agents differ in wealth taxes are proportional to income and are redistributed as equal lump sum transfers voting occurs every period and each consumer votes for the tax that maximizes his welfare we characterize time consistent markov perfect equilibria twofold first restricting utility classes we show that the economy s aggregate state is mean and median wealth second we derive the median voter s first order condition interpreting it as a tradeoff between distortions and net wealth transfers our method for solving the steady state relies on a polynomial expansion around the steady state

fiscal policy with heterogeneous agents and incomplete markets i undertake a quantitative investigation into the short run effects of changes in the timing of proportional income taxes for model economies in which heterogeneous households face a borrowing constraint temporary tax changes are found to have large real effects in the benchmark model a temporary tax cut increases aggregate consumption on impact by around 29 cents for every dollar of tax revenue lost comparing the benchmark incomplete markets model to a complete markets economy income tax cuts provide a larger boost to consumption and a smaller investment stimulus when asset markets are incomplete copyright 2005 wiley blackwell

can social security be welfare improving when there is demographic uncertainty abstract this paper studies the welfare implications of a payg pension system in an overlapping generations olg model with demographic uncertainty and incomplete markets in the absence of public pensions small cohorts tend to be favoured by the changes in relative prices implied by demographic shocks payg defined benefit systems can help to share the financial risks created by this type of demographic uncertainty across generations our careful quantitative analysis test this possibility with unfavourable results the overall welfare impact of the public pensions is negative due to the prominence of the crowding out effect over the insurance effect

the regulatory record of the greenspan fed alan greenspan played an important role in shaping major changes in the structure and rules of financial regulation indeed it is in this realm that chairman greenspan has made his most important contributions as an institutional innovator just describing how the federal reserve made possible the expansion of commercial banks powers to permit them to engage in investment banking could occupy this entire essay that change occurred in several stages beginning with the fed s decision in 1987 to allow small inroads by banks into investment banking those changes created a favorable track record which laid the groundwork for the administration s and congress s willingness to eliminate restrictions entirely in 1999 a policy the fed advocated in the 1990s the growth in commercial banks market share in investment banking has been dramatic in 1992 only 10 percent of corporate debt and less than 1 percent of corporate equity flotations were underwritten solely or jointly by commercial banks by 2002 that share had grown to 66 percent of debt and 36 percent of equity calomiris and thanavut pornrojnangkool 2006 can one identify a philosophy of regulation that underlies the regulatory advocacy of the fed under chairman greenspan although the fed s advocacy on various matters may appear somewhat contradictory or at least philosophically heterodox the fed has behaved in a manner that is remarkably predictable once one takes account of the political arena in which both regulatory and monetary policy are made there is fairly straightforward logic to the fed s regulatory advocacy to understand it one must consider the fed as a political player in the washington drama as a creature of congress subject to its oversight as a competitor with other regulators for influence within the financial services industry and within the political realm and as a prioritizing agent that had to decide which battles monetary or regulatory to fight when and how hard one lesson of this overview of fed regulatory advocacy during the greenspan years is that the algorithm of fed advocacy the decision process that decides which position the fed will advocate has not changed although some of the specific policy advocacy has john hawke 1988 wrote an evaluation of chairman paul volcker s regulatory policy during his years at the fed which was presented at the 1988 assa annual meeting and which describes an approach to fed policy that is similar to the one suggested here in that sense chairman greenspan did not change the fed indeed it is probably more accurate to say that his personal advocacy was changed by being at the fed but that does not imply an irrelevance to his leadership what emerges from a review of greenspan s regulatory record is an appreciation of his skill as a beltway warrior particularly with respect to his success in facilitating the geographical expansion of banks broadening bank powers and securing a prominent role for the fed under the gramm leach bliley act of 1999

cost of business cycles with indivisibilities and liquidity constraints it is almost universally agreed that individuals face incomplete insurance markets and cannot perfectly insure against the idiosyncratic risk in this paper simple general equilibrium models with incomplete insurance markets are examined in order to assess the impact of imperfect insurance on the magnitude of the welfare costs of business cycles two versions of incomplete insurance markets are considered and certain statistical properties of the equilibrium stochastic processes in these environments are compared with those of a perfect insurance economy

the risk free rate in heterogeneous agent incomplete insurance economies abstract why has the average real risk free interest rate been less than one percent the question is motivated by the failure of a class of calibrated representative agent economies to explain the average return to equity and risk free debt i construct an economy where agents experience uninsurable idiosyncratic endowment shocks and smooth consumption by holding a risk free asset i calibrate the economy and characterize equilibria computationally with a borrowing constraint of one year s income the resulting risk free rate is more than one percent below the rate in the comparable representative agent economy

life cycle economies and aggregate fluctuations do the implications for business cycle issues change when we switch from studying infinitely lived representative agent models to more sophisticated demographic structures with finitely lived agents this article addresses that question by using a large overlapping generations model that is calibrated to u s demographic properties microeconomic evidence and national income and product accounts the finding is that the answers obtained are basically the same for the two kinds of models the article also explores the relative volatility of hours across age groups an issue that cannot be addressed by using the infinitely lived representative agent abstraction

the sensitivity of tests of the intertemporal allocation of consumption to near rational alternatives suppose a consumer sets consumption equal to income each period rather than following the optimal permanent income decision rule how much utility does he lose this paper finds that the answer is typically less than 10 cents 1 per quarter in environments specified by popular tests on aggregate data it includes calculations of the costs of excess sensitivity and excess smoothness to income and interest rate changes and the costs of ignoring information it concludes that the theory does not make predictions for aggregate tests that are robust to small costs such as information or transactions copyright 1989 by american economic association

a history of european electricity day ahead prices in this article we examine the development of day ahead prices in five european markets which became more connected over recent years where previous studies examined the convergence of price levels over time we focus on patterns in estimates for the parameters in a switching regimes model this makes it possible to distinguish between prices under normal market conditions and under non normal market conditions those market conditions that can cause extreme price spikes we expect that increased connectivity yields additional supply in the short term and therefore will reduce the impact of price spikes our results indicate that the impact of price spikes and volatility decreased over time that prices behave more random and that the parameter estimates between various connected markets seem to have converged between the belgian dutch french german and nordic day ahead markets over the years 2003 through 2010 these results can be explained by increased connectivity and improved liquidity