Dynamic risksharing in the United States and Europe

We use a panel VAR model to improve upon the existing methodologies to analyze interregional risksharing and consumption smoothing channels. First, we endogenize the output process within a more general multi-equation framework, capturing the dynamic feedback between output and various smoothing channels. Second, in line with dynamic general equilibrium open economy models of risksharing, we exploit impulse response functions to trace the role of each smoothing channel over time, in the presence of different structural shocks (temporary vs. permanent and output vs. smoothing channels). In the application to the US and OECD countries, we find different dynamic properties of different smoothing channels. We compare our results with the predictions of standard risksharing and consumption theories, and tackle some of the puzzles in the literature, such as the “international risksharing puzzle” and the “consumption-output correlation puzzle.” We are also able to address such policy issues as whether fiscal stabilizers have been substitutes or complements for financial market diversification activities and whether further financial market integration is likely to provide countries with more shock-absorption tools. A key result is the strong substitutability between capital and credit smoothing in the US, and between fiscal and credit smoothing in the OECD.     

The irreversibility premium

When investment is irreversible, theory suggests that firms will be “reluctant to invest.” This reluctance creates a wedge between the discount rate guiding investment decisions and the standard Jorgensonian user cost (adjusted for risk). We use the intertemporal tradeoff between benefits and costs of changing the capital stock to estimate this wedge, which we label the irreversibility premium. Estimates are based on panel data for the period 1980-2001. The large dataset allows us to estimate the effects of limited resale markets, low depreciation rates, high uncertainty, and negative industry-wide shocks on the irreversibility premium. Our estimates provide a readily interpretable measure of the importance of irreversibility and document that the irreversibility premium is both economically and statistically significant.     

Consumption smoothing channels in open economies

Many intertemporal open economy macro models imply a theory of consumption smoothing channels; thus we build an empirical model to analyze the intertemporal smoothing role of saving components (fixed investments, inventories and trade balance) through the use of VAR impulse responses to different types of shocks. We find that for the OECD countries the bulk of intertemporal smoothing has been carried out domestically, via gross fixed investments and inventories, but the trade balance has also played a relevant – albeit volatile – smoothing role. We also characterize the dynamic behavior of each component: the trade balance and inventories are mostly used as short-run smoothing tools while fixed investment provides more and more smoothing over time. We can also address some empirical puzzles, such as the “excess sensitivity of investment” anomaly (Glick, R., Rogoff, K., 1995. Global versus country-specific productivity shocks and the current account. Journal of Monetary Economics, 35, 159–192) and the “saving-investment correlation puzzle” (Feldstein, M., Horioka, C., 1980. Domestic saving and international capital flows. Economic Journal, 90, 314–329).     

Flexible inflation targets,forex interventions and exchange rate volatility in emerging countries

Emerging economies with inflation targets (IT) face a dilemma between fulfilling the theoretical conditions of “strict IT”, which imply a fully flexible exchange rate, or applying a “flexible IT”, which entails a de facto managed-floating exchange rate with foreign exchange (forex) interventions to moderate exchange rate volatility. Using a panel data model for 37 countries we find that, although IT lead to higher exchange rate instability than alternative regimes, forex interventions in some IT countries have been more effective to lower volatility than in non-IT countries, which may justify the use of “flexible IT” by policymakers.     

Estimating the expected marginal rate of substitution: A systematic exploitation of idiosyncratic risk

We develop a methodology to estimate the shadow risk free rate or expected intertemporal marginal rate of substitution, “EMRS”. Our technique relies upon exploiting idiosyncratic risk, since theory dictates that idiosyncratic shocks earn the EMRS. We apply our methodology to recent monthly and daily data sets for the New York and Toronto Stock Exchanges. We estimate EMRS with precision and considerable time-series volatility, subject to an identification assumption. Both markets seem to be internally integrated; different assets traded on a given market share the same EMRS. We reject integration between the stock markets, and between stock and money markets.     

A present value test of habits and the current account

Forecasts derived from standard intertemporal current account (ICA) models generally fail to match the volatility of actual current accounts. This paper offers a solution to the “excess volatility” problem of standard ICA models by incorporating consumption habits into the standard model. The model, as developed in the paper, shows that significant habit formation implies increased current account volatility, as sluggishness is introduced into the consumption adjustment process that follows income shocks. A theory-consistent measure of the degree of habit formation is estimated using GMM. The estimated habit parameter is found to be statistically significant in six of eight quarterly samples.     

我国城镇居民消费的风险分担与跨期平滑——基于1985~2011年的实证研究

应用我国1985~2011年的省级数据,构建面板数据模型实证分析了城镇家庭消费的风险分担和跨期平滑情况。研究结果显示：我国城镇家庭消费的跨期平滑是不完全的。无论是从我国整体情况来看,还是从不同地区或者不同收入组家庭来考察,城镇家庭消费的跨期平滑系数γ均介于0~1之间。此外,城镇家庭消费的风险分担程度很低,消费风险分担机制很不完善。进一步的分析显示：各个地区内部和不同收入组内部的风险分担系数要高于全国总体的风险分担系数,这说明我国城镇家庭在进行消费风险分担时具有显著的“本地偏好”和“阶层效应”。     

Towards a measure of financial fragility

The paper proposes a measure of financial fragility that is based on economic welfare in a general equilibrium model calibrated against UK data. The model comprises a household sector, three active heterogeneous banks, a central bank/regulator, incomplete markets, and endogenous default. We address the impact of monetary and regulatory policy, credit and capital shocks in the real and financial sectors and how the response of the economy to shocks relates to our measure of financial fragility. Finally we use panel VAR techniques to investigate the relationships between the factors that characterise financial fragility in our model, i.e. banks’ probabilities of default and banks’ profits – to a proxy of welfare.      

Tax clientele effects of dividends under intertemporal consumption choices

Corporate investors putatively seek high dividends because marginal tax rates on dividends are lower than those on capital gains. However, a lower tax “rate” does not necessarily mean that a higher dividend is desirable. Taking the intertemporal consumption choices given, corporate investors are expected to prefer “time-preference-fitted dividends” if tax rates remain constant over time; otherwise they confront a larger “amount” of tax obligation. If dividend shortfalls exist, they must realize capital gains and thereby suffer unfavorable tax treatment, whereas excessive payments cause intertemporal double taxation on reinvested dividends. Tax-saving problems should be linked with intertemporal consumption choices.     

Adjustment patterns to commodity terms of trade shocks: The role of exchange rate and international reserves policies

We analyze the way in which Latin American countries have adjusted to commodity terms of trade (CTOT) shocks in the 1970–2007 period. Specifically, we investigate the degree to which the active management of international reserves and exchange rates impacted the transmission of international price shocks to real exchange rates. We find that active reserve management not only lowers the short run impact of CTOT shocks significantly, but also affects the long run adjustment of REER, effectively lowering its volatility. We also show that relatively small increases in the average holdings of reserves by Latin American economies (to levels still well below other emerging regions current averages) would provide a policy tool as effective as a fixed exchange rate regime in insulating the economy from CTOT shocks. Reserve management could be an effective alternative to fiscal or currency policies for relatively trade closed countries and economies with relatively poor institutions or high government debt. Finally, we analyze the effects of active use of reserve accumulation aimed at smoothing REERs. The result support the view that “leaning against the wind” is potent, but more effective when intervening to support weak currencies rather than intervening to slow down the pace of real appreciation. The active reserve management reduces substantially REER volatility.     

Default, insurance, and debt over the life-cycle

The widespread use of debt and default suggests that unsecured credit markets play an important role in consumption smoothing. In this paper, I address two previously unanswered questions. First, how does policy towards debt default affect the evolution of consumption and net worth over the life-cycle? Second, how does debt default policy interact with social insurance over the life-cycle? The findings are as follows. First, US default policy appears “lax”, in the sense that it creates severe credit constraints, especially for the young. Second, eliminating default will lower consumption inequality among the young, but will increase it among the old. Third, social insurance alters default risk and, in turn, loan pricing, and therefore matters for purely intertemporal smoothing.     

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.     

Time variation in U.S. wage dynamics

Supply and demand shocks had much stronger long-run effects on nominal wages and prices during the “Great Inflation”. For supply shocks, there is even a sign switch in the nominal wage response. Before and after the “Great Inflation”, nominal wages moved in the same direction as real wages and in the opposite direction of the price level, whereas nominal wages and prices moved in the same direction at longer horizons after the shock in the 1970s. Estimation of a DSGE model shows that these results reflect changes in the degree of wage indexation over time, which was considerably higher during the “Great Inflation”.     

Misreaction or misspecification? A re-examination of volatility anomalies

Existing research examines the impact of volatility shocks on the relative pricing of long-term vs. short-term options and documents patterns of “short-horizon underreaction” and “long-horizon overreaction” in the options market. These studies, however, rely on implied volatilities derived from specific option-pricing models and are thus subject to model specification errors. In this paper, we show that these anomalous patterns are the result of model misspecification as opposed to market misreaction. We provide evidence that these patterns are consistent with, in both direction and magnitude, inherent biases in the misspecified models. We also apply a model-free approach to re-examine the anomalous patterns and find no evidence of market misreaction.     

Incomplete Intertemporal Consumption Smoothing and Incomplete Risk Sharing

This paper develops a method to estimate jointly the degree of intertemporal consumption smoothing and the degree of “inter‐regional” risk sharing. The empirical results for the U.S. states and OECD and EU countries suggest that: (i) regardless of the assumption on the degree of intertemporal consumption smoothing, the degree of risk sharing within a country is larger than across countries; (ii) the degree of intertemporal consumption smoothing within a country is also larger than across countries; and (iii) the difference between the degree of intertemporal consumption smoothing within U.S. states and across OECD and EU countries is as large as the difference between the degree of risk sharing, contrary to the findings of some past studies.     

What are the effects of monetary policy on output? Results from an agnostic identification procedure

This paper proposes to estimate the effects of monetary policy shocks by a new agnostic method, imposing sign restrictions on the impulse responses of prices, nonborrowed reserves and the federal funds rate in response to a monetary policy shock. No restrictions are imposed on the response of real GDP to answer the key question in the title. I find that “contractionary” monetary policy shocks have no clear effect on real GDP, even though prices move only gradually in response to a monetary policy shock. Neutrality of monetary policy shocks is not inconsistent with the data.     

Inflation dynamics: A cross-country investigation

We document that “persistent and lagged” inflation (with respect to output) is a world-wide phenomenon in that these short-run inflation dynamics are highly synchronized across countries. In particular, the average cross-country correlation of inflation is significantly and systematically stronger than that of output, while the cross-country correlation of money growth is essentially zero. We investigate whether standard monetary models driven by monetary shocks are consistent with the empirical facts. We find that neither the new Keynesian sticky-price model nor the sticky-information model can fully explain the data. An independent contribution of the paper is to provide a simple solution technique for solving general equilibrium models with sticky information.     

Evaluating the real effect of bank branching deregulation: Comparing contiguous counties across US state borders

This paper proposes a new methodology to evaluate the economic effect of state-specific policy changes, using bank-branching deregulations in the US as an example. The new method compares economic performance of pairs of contiguous counties separated by state borders, where on one side restrictions on statewide branching were removed relatively earlier, to create a natural “regression discontinuity” setup. The study uses a total of 285 pairs of contiguous counties along 38 segments of such regulation change borders to estimate treatment effects for 23 separate deregulation events taking place between 1975 and 1990. To distinguish real treatment effects from those created by data-snooping and spatial correlations, fictitious placebo deregulations are randomized (permutated) on another 32 segments of non-event borders to establish empirically a statistical table of critical values for the estimator. The method determines that statistically significant growth accelerations can be established at a > 90% confidence level in five (and none prior to 1985) out of the 23 deregulation events examined. “Hinterland counties” within the still-regulated states, but farther away from the state borders, are used as a second control group to consider and reject the possibility that cross-border spillover of deregulation effects may invalidate the empirical design.     

Credit and identity theft

The quintessential crime of the information age is identity theft, the malicious use of personal identifying data. In this paper we model “identity” and its use in credit transactions. Various types of identity theft occur in equilibrium, including “new account fraud,” “existing account fraud,” and “friendly fraud.” The equilibrium incidence of identity theft represents a tradeoff between a desire to avoid costly or invasive monitoring of individuals on the one hand, and the need to control transactions fraud on the other. Our results suggest that technological advances will not eliminate this tradeoff.     

“Black Swans” before the “Black Swan” evidence from international LIBOR–OIS spreads

The LIBOR–OIS spread is a closely monitored indicator of the financial health of economy. Previous research has used this spread to identify and anticipate abrupt changes in financial markets. Taylor and Williams (2009) refer to the drastic increase in the US LIBOR–OIS spread on August 7th, 2007 as a “Black Swan” in the money market. In this paper, rather than rely on visual observations of “Black Swans” we estimate them using Bai and Perron’s (1998) procedure. We estimate structural breaks, Granger causality tests, and innovation accounting in international LIBOR–OIS spreads and a CDS index to better understand their dynamics during the recent crisis. Our results reveal that “Black Swans” appeared in smaller economies prior to that in large ones during the financial crisis. In addition, we find that only shocks to the US LIBOR–OIS spread has any statistically significant effects after 30 days.