Amir Kermani

Bio: Amir Kermani is an academic researcher from University of California, Berkeley. The author has contributed to research in topics: Stock market & Monetary policy. The author has an hindex of 17, co-authored 38 publications receiving 1533 citations. Previous affiliations of Amir Kermani include University of Tehran & National Bureau of Economic Research.

The Value of Connections in Turbulent Times: Evidence from the United States

Abstract: The announcement of Timothy Geithner as nominee for Treasury Secretary in November 2008 produced a cumulative abnormal return for financial firms with which he had a connection. This return was about 6% after the first full day of trading and about 12% after ten trading days. There were subsequently abnormal negative returns for connected firms when news broke that Geithner’s confirmation might be derailed by tax issues. Excess returns for connected firms may reflect the perceived impact of relying on the advice of a small network of financial sector executives during a time of acute crisis and heightened policy discretion.

Interest Rate Pass-Through: Mortgage Rates, Household Consumption, and Voluntary Deleveraging

Abstract: Exploiting variation in the timing of resets of adjustable-rate mortgages (ARMs), we find that a sizable decline in mortgage payments (up to 50 percent) induces a significant increase in c...

Credit-Induced Boom and Bust

Abstract: Can a credit expansion induce a boom and bust in house prices and real economic activity? This paper exploits the federal preemption of national banks in 2004 from local laws against predatory lending to gauge the effect of the supply of credit on the real economy. Specifically, we exploit the heterogeneity in the market share of national banks across counties and in state anti-predatory laws to instrument for an outward shift in the supply of credit. First, a comparison between counties in the top and bottom deciles of presence of national banks in states with anti-predatory laws suggests that the preemption regulation resulted in a 11% increase in annual lending in the 2004-2006 period. Our estimates show that this lending increase is associated with a 3.3% rise in annual house price growth rate and a 2.2% expansion of employment in the non-tradable sectors. These effects are followed by a decline in loan origination, house prices and employment of similar magnitude in subsequent years. Furthermore, we show that the increase in the supply of credit reduced mortgage delinquency rates during the boom years but increased them in bust years. Finally, these effects are stronger for subprime and inelastic regions.

How Quantitative Easing Works: Evidence on the Refinancing Channel

Abstract: Despite massive large-scale asset purchases (LSAPs) by central banks around the world since the global financial crisis, there is a lack of empirical evidence on whether and how these programs affect the real economy. Using rich borrower-linked mortgage-market data, we document that there is a “flypaper effect” of LSAPs, where the transmission of unconventional monetary policy to interest rates and (more importantly) origination volumes depends crucially on the assets purchased and degree of segmentation in the market. For example, QE1, which involved significant purchases of GSE-guaranteed mortgages, increased GSE-eligible mortgage originations significantly more than the origination of GSE-ineligible mortgages. In contrast, QE2’s focus on purchasing Treasuries did not have such differential effects. We find that the Fed’s purchase of MBS (rather than exclusively Treasuries) during QE1 resulted in an additional $600 billion of refinancing, substantially reducing interest payments for refinancing households, leading to a boom in equity extraction, and increasing consumption by an additional $76 billion. This de facto allocation of credit across mortgage market segments, combined with sharp bunching around GSE eligibility cutoffs, establishes an important complementarity between monetary policy and macroprudential housing policy. Our counterfactual simulations estimate that relaxing GSE eligibility requirements would have significantly increased refinancing activity in response to QE1, including a 20% increase in equity extraction by households. Overall, our results imply that central banks could most effectively provide unconventional monetary stimulus by supporting the origination of debt that would not be originated otherwise.

Comparative Politics and the Synthetic Control Method

Abstract: In recent years a widespread consensus has emerged about the necessity of establishing bridges between quantitative and qualitative approaches to empirical research in political science. In this article, we discuss the use of the synthetic control method as a way to bridge the quantitative/qualitative divide in comparative politics. The synthetic control method provides a systematic way to choose comparison units in comparative case studies. This systematization opens the door to precise quantitative inference in small-sample comparative studies, without precluding the application of qualitative approaches. Borrowing the expression from Sidney Tarrow, the synthetic control method allows researchers to put "qualitative flesh on quantitative bones.'' We illustrate the main ideas behind the synthetic control method by estimating the economic impact of the 1990 German reunification on West Germany.

Multiagent systems: a modern approach to distributed artificial intelligence

Abstract: Multiagent Systems is the title of a collection of papers dedicated to surveying specific themes of Multiagent Systems (MAS) and Distributed Artificial Intelligence (DAI). All of them authored by leading researchers of this dynamic multidisciplinary field.

Monetary Policy According to HANK

Abstract: We revisit the transmission mechanism from monetary policy to household consumption in a Heterogeneous Agent New Keynesian (HANK) model. The model yields empirically realistic distributions of wealth and marginal propensities to consume because of two features: uninsurable income shocks and multiple assets with different degrees of liquidity and different returns. In this environment, the indirect effects of an unexpected cut in interest rates, which operate through a general equilibrium increase in labor demand, far outweigh direct effects such as intertemporal substitution. This finding is in stark contrast to small- and medium-scale Representative Agent New Keynesian (RANK) economies, where the substitution channel drives virtually all of the transmission from interest rates to consumption. Failure of Ricardian equivalence implies that, in HANK models, the fiscal reaction to the monetary expansion is a key determinant of the overall size of the macroeconomic response.

Using Synthetic Controls: Feasibility, Data Requirements, and Methodological Aspects

Abstract: Probably because of their interpretability and transparent nature, synthetic controls have become widely applied in empirical research in economics and the social sciences. This article aims to provide practical guidance to researchers employing synthetic control methods. The article starts with an overview and an introduction to synthetic control estimation. The main sections discuss the advantages of the synthetic control framework as a research design, and describe the settings where synthetic controls provide reliable estimates and those where they may fail. The article closes with a discussion of recent extensions, related methods, and avenues for future research.

Monetary Policy and the Redistribution Channel

Abstract: This paper evaluates the role of redistribution in the transmission mechanism of monetary policy to consumption. Using consumer theory, I show that redistribution has aggregate effects whenever marginal propensities to consume (MPCs) covary, across households, with balancesheet exposures to aggregate shocks. Unexpected inflation gives rise to a Fisher channel and real interest rate shocks to an interest rate exposure channel; both channels are likely to contribute to the expansionary effects of accommodative monetary policy. Indeed, using a sufficient statistic approach, I find that redistribution could be the dominant reason why aggregate consumer spending reacts to transitory changes in the real interest rate, provided households’ elasticities of intertemporal substitution are reasonably small (0.3 or less in the United States). I then build and calibrate a general equilibrium model with heterogeneity in MPCs, and I evaluate how the redistribution channel alters the economy’s response to shocks. When household assets and liabilities have short effective maturities, the interest rate exposure channel raises the elasticity of aggregate demand to real interest rates, which dampens fluctuations in the natural rate of interest in response to exogenous shocks and amplifies the real effects of monetary policy shocks. The model predicts that if U.S. mortgages all had adjustable rates—as they do in the U.K.—the effect of interest-rate changes on consumer spending would more than double. In addition, this effect would be asymmetric, with rate increases reducing spending by more than cuts would increase it.