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Author:Aruoba, S. Boragan 

Conference Paper
Search, money, and capital: a neoclassical dichotomy
Recent work has reduced the gap between search-based monetary theory and mainstream macroeconomics by incorporating into the search model some centralized markets as well as some decentralized markets where money is essential. This paper takes a further step toward this integration by introducing labor, capital, and neoclassical firms. The resulting framework nests a search-theoretic monetary model and a standard neoclassical growth model as special cases.
AUTHORS: Wright, Randall; Aruoba, S. Boragan
DATE: 2003

Working Paper
Search, money and capital: a neoclassical dichotomy
Recent work has reduced the gap between search-based monetary theory and mainstream macroeconomics by incorporating into the search model some centralized markets as well as some decentralized markets where money is essential. This paper takes a further step towards this integration by introducing labor, capital and neoclassical firms. The resulting framework nests the search-theoretic monetary model and a standard neoclassical growth model as special cases. Perhaps surprisingly, it also exhibits a dichotomy: one can determine the equilibrium path for the value of money independently of the paths of consumption, investment and employment in the centralized market.
AUTHORS: Aruoba, S. Boragan; Wright, Randall
DATE: 2002

Working Paper
Comparing solution methods for dynamic equilibrium economies
This paper compares solution methods for dynamic equilibrium economies. The authors compute and simulate the stochastic neoclassical growth model with leisure choice using Undetermined Coefficients in levels and in logs, Finite Elements, Chebyshev Polynomials, Second and Fifth Order Perturbations and Value Function Iteration for several calibrations. The authors document the performance of the methods in terms of computing time, implementation complexity and accuracy and they present some conclusions about their preferred approaches based on the reported evidence.
AUTHORS: Aruoba, S. Boragan; Fernandez-Villaverde, Jesus; Rubio-Ramirez, Juan F.
DATE: 2003

Working Paper
Money and capital
We revisit classic questions concerning the effects of money on investment in a new framework: a two-sector model where some trade occurs in centralized and some in decentralized markets, as in recent monetary theory, but extended to include capital. This allows us to incorporate novel elements from the microfoundations literature on trading with frictions, including stochastic exchange opportunities, alternative pricing mechanisms, etc. We calibrate models with bargaining and with price taking in the decentralized market.
AUTHORS: Aruoba, S. Boragan; Waller, Christopher J.; Wright, Randall
DATE: 2007

Working Paper
Money and capital: a quantitative analysis
We study the effects of money (anticipated inflation) on capital formation. Previous papers on this topic adopt reduced-form approaches, putting money in the utility function or imposing cash in advance, but use otherwise frictionless models. We follow a literature that is more explicit about the frictions making money essential. This introduces several new elements, including a two-sector structure with centralized and decentralized markets, stochastic trading opportunities, and bargaining. We show how these elements matter qualitatively and quantitatively. Our numerical results differ from findings in the reduced-form literature. The analysis reduces the previously large gap between mainstream macro and monetary theory.
AUTHORS: Aruoba, S. Boragan; Waller, Christopher J.; Wright, Randall
DATE: 2009

Working Paper
The macroeconomy and the yield curve: a nonstructural analysis
We estimate a model with latent factors that summarize the yield curve (namely, level, slope, and curvature) as well as observable macroeconomic variables (real activity, inflation, and the stance of monetary policy). Our goal is to provide a characterization of the dynamic interactions between the macroeconomy and the yield curve. We find strong evidence of the effects of macro variables on future movements in the yield curve and much weaker evidence for a reverse influence. We also relate our results to a traditional macroeconomic approach based on the expectations hypothesis.
AUTHORS: Diebold, Francis X.; Aruoba, S. Boragan; Rudebusch, Glenn D.
DATE: 2003

Working Paper
Macroeconomic Dynamics Near the ZLB : A Tale of Two Countries
We compute a sunspot equilibrium in an estimated small-scale New Keynesian model with a zero lower bound (ZLB) constraint on nominal interest rates and a full set of stochastic fundamental shocks. In this equilibrium a sunspot shock can move the economy from a regime in which inflation is close to the central bank's target to a regime in which the central bank misses its target, inflation rates are negative, and interest rates are close to zero with high probability. A nonlinear filter is used to examine whether the U.S. in the aftermath of the Great Recession and Japan in the late 1990s transitioned to a deflation regime. The results are somewhat sensitive to the model specification, but on balance, the answer is affirmative for Japan and negative for the U.S.
AUTHORS: Schorfheide, Frank; Cuba-Borda, Pablo; Aruoba, S. Boragan
DATE: 2016-05

Working Paper
Optimal fiscal and monetary policy when money is essential
We study optimal fiscal and monetary policy in an environment where explicit frictions give rise to valued money, making money essential in the sense that it expands the set of feasible trades. Our main results are in stark contrast to the prescriptions of earlier flexible-price Ramsey models. Two especially important findings emerge from our work: the Friedman Rule is typically not optimal and inflation is stable over time. Inflation is not a substitute instrument for a missing tax, as is sometimes the case in standard Ramsey models. Rather, the inflation tax is exactly the right tax to use because the use of money has a rent associated with it. Regarding the optimal dynamic policy, realized (ex-post) inflation is quite stable over time, in contrast to the very volatile ex-post inflation rates that arise in standard flexible-price Ramsey models. We also find that because capital is underaccumulated, optimal policy includes a subsidy on capital income. Taken together, these findings turn conventional wisdom from traditional Ramsey monetary models on its head.
AUTHORS: Chugh, Sanjay K.; Aruoba, S. Boragan
DATE: 2006

Working Paper
Real-time measurement of business conditions
We construct a framework for measuring economic activity in real time (e.g., minute-by-minute), using a variety of stock and flow data observed at mixed frequencies. Specifically, we propose a dynamic factor model that permits exact filtering, and we explore the efficacy of our methods both in a simulation study and in a detailed empirical example.
AUTHORS: Aruoba, S. Boragan; Diebold, Francis X.; Scotti, Chiara
DATE: 2007

Report
Term Structures of Inflation Expectations and Real Interest Rates: The Effects of Unconventional Monetary Policy
Inflation expectations have recently received increased interest because of the uncertainty created by the Federal Reserve?s unprecedented reaction to the Great Recession. The effect of this reaction on the real economy is also an important topic. In this paper I use various surveys to produce a term structure of inflation expectations ? inflation expectations at any horizon from 3 to 120 months ? and an associated term structure of real interest rates. Inflation expectations extracted from this model track actual (ex-post) realizations of inflation quite well, and in terms of forecast accuracy they are at par with or superior to some popular alternatives obtained from financial variables. Looking at the period 2008?2013, I conclude that the unconventional policies of the Federal Reserve kept long-run inflation expectations anchored and provided a large level of monetary stimulus to the economy.
AUTHORS: Aruoba, S. Boragan
DATE: 2014-08-13

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